Patent Description:
A signal conditioning circuit is a circuit that converts an analogue signal into a digital signal that can be used for data acquisition, controlling processes, executing computations, displaying readouts, and so on. Sampling and conditioning a voltage signal is main components of the signal conditioning circuit.

While performing voltage sampling in practice, a range of an input voltage is significantly large. When the input voltage is relatively large, the input voltage may exceed a range of a sampling circuit. When the input voltage is small, sampling accuracy may be insufficient, or no data can be sampled. Usually, a same amplification multiple may be applied to amplify the input voltage. The sampling accuracy may be low and universality of sampling may be low. When a microcontroller is configured to control segmented sampling, the circuit may be complex and costly. Prior art document <CIT> discloses an auto-ranging measurement circuit receiving an input signal. The input signal is compared to two reference or threshold voltages in comparators producing three control voltage outputs to control transistors that drive relays forming with resistors an attenuator that conditions the input signal.

Therefore, a segmented selectable signal conditioning circuit and a measurement device are provided to solve the problem in the voltage sampling and conditioning methods as mentioned in the above, such that an applicable sampling range of voltage sampling and conditioning may be increased, accuracy and universality of sampling may be improved, and scenarios that voltage sampling circuits can be applied may be increased.

According to a first aspect, a signal conditioning circuit is provided and includes: a segmented voltage threshold circuit, comprising X segmented voltage threshold sub-circuits, wherein the X segmented voltage threshold sub-circuits is configured to output X voltage threshold signals, and the X voltage threshold signals have different threshold values, and X is an integer greater than or equal to <NUM>; a selection circuit, connected to the segmented voltage threshold circuit and configured to receive an input voltage signal and the X voltage threshold signals and output X+<NUM> conduction signals, wherein each conduction signal of the X+<NUM> conduction signals is output based on a comparison result between the input voltage signal and one of the X voltage threshold signals; and a segmented voltage conditioning circuit, comprising X+<NUM> segmented voltage conditioning sub-circuits, wherein each of the X+<NUM> segmented voltage conditioning sub-circuit is configured to condition the input voltage signal to output a corresponding output voltage signal based on a corresponding conduction signal of the X +<NUM> conduction signals. Further, the segmented voltage conditioning circuit comprises a switching transistor and a proportional operational amplifier sub-circuit, the proportional operational amplifier sub-circuit is configured to amplify the input voltage signal in a preset proportion, wherein a gate of the switching transistor is connected to the selection circuit, a source of the switching transistor is connected to an input terminal of the proportional operational amplifier sub-circuit, and an output terminal of the proportional operational amplifier sub-circuit is configured to output a proportional amplified voltage signal.

According to a second aspect, a signal measurement device is provided and includes the signal conditioning circuit in the first aspect.

According to the present disclosure, the signal conditioning circuit includes a segmented voltage threshold circuit, a segmented voltage conditioning circuit and a selection circuit. The segmented voltage threshold circuit includes at least two voltage threshold sub-circuits. Each voltage threshold sub-circuit is configured to output a voltage threshold signal. Voltage threshold signals are set to have different threshold values. The segmented voltage conditioning circuit includes a plurality of segmented voltage conditioning sub-circuits. Each segmented voltage conditioning sub-circuit is configured to condition the input voltage signal based on a corresponding conduction signal to output a corresponding output voltage signal. The selection circuit is connected to the segmented voltage threshold circuit and the segmented voltage conditioning circuit. The selection circuit is configured to: receive the input voltage signal and each voltage threshold signal; compare the voltage value of the input voltage signal to a threshold value of each voltage threshold signal; and, based on a comparison result, output the conduction signal corresponding to each comparison, such that segmented and selectable voltage signal conditioning may be achieved. In the present disclosure, the voltage signal conditioning is optimized, the voltage is automatically segmented and conditioned. The circuit may be flexibly adapted for multi-segment voltage conditioning. The applicable sampling range of the voltage sampling conditioning is increased, and the sampling accuracy and universality is improved. Therefore, scenarios that voltage sampling and conditioning are increased, and universality and accuracy of the circuit are improved.

Reference numerals in the drawings:
segmented voltage threshold circuit <NUM>; first segmented voltage threshold sub-circuit <NUM>; second segmented voltage threshold sub-circuit <NUM>; segmented voltage conditioning circuit <NUM>; first segmented voltage conditioning sub-circuit <NUM>; first proportional operational amplifier sub-circuit <NUM>; first voltage following sub-circuit <NUM>; second segmented voltage conditioning sub-circuit <NUM>; second proportional operational amplifier sub-circuit <NUM>; first differential amplifier sub-circuit <NUM>; first continuously-output conditioning circuit <NUM>; second voltage following sub-circuit <NUM>; third segmented voltage conditioning sub-circuit <NUM>; third proportional operational amplifier sub-circuit <NUM>; second differential amplifier sub-circuit <NUM>; second continuously-output conditioning circuit <NUM>; third voltage following sub-circuit <NUM>; selection circuit <NUM>; first comparator B <NUM>; second comparator B2; third comparator B3; fourth comparator B4; first switching tube Q1; second switching tube Q2; third switching tube Q3; fourth switching tube Q4; fifth switching tube Q5; first resistor R1; second resistor R2; third resistor R3; fourth resistor R4; fifth resistor R5; sixth resistor R6; seventh resistor R7; eighth resistor R8; ninth resistor R9; tenth resistor R10; eleventh resistor R11; twelfth resistor R12; thirteenth resistor R13; fourteenth resistor R14; fifteenth resistor R15; sixteenth resistor R16; seventeenth resistor R17; eighteenth resistor R18; nineteenth resistor R19; twentieth resistor R20; twenty-first resistor R21; twenty-second resistor R22.

In order to enable any ordinary skilled person in the art to understand the present disclosure better, technical solutions in the embodiments of the present disclosure will be described clearly and completely below by referring to the accompanying drawings in the embodiments of the present disclosure. Apparently, the described embodiments are only a part of but not all of the embodiments of the present disclosure. All other embodiments obtained by any ordinary skilled person in the art based on the embodiments of the present disclosure without creative work shall fall within the scope of the present disclosure.

To noted that the terms "first", "second", and so on, in the specification, claims, and the accompanying drawings of the present disclosure are used to distinguish similar objects and shall not be interpreted as describing a particular order or sequence. It shall be understood that the data described by the terms are interchangeable, where appropriate, for the purposes of the embodiments of the present disclosure. Furthermore, the terms "include", "have", and any variation thereof, are used to cover non-exclusive inclusion. For example, a process, a method, a system, a product or an apparatus including a series of operations or units need not be limited to those operations or units that are clearly listed, but may include those that are not explicitly listed or inherently included in the process, the method, the system, the product or the apparatus.

In addition, the term "plurality" shall have the meaning of two and more than two.

According to the present disclosure, a signal conditioning circuit is provided and includes: a segmented voltage threshold circuit, a selection circuit, and a segmented voltage conditioning circuit. The segmented voltage threshold circuit includes X segmented voltage threshold sub-circuits. The X segmented voltage threshold sub-circuits is configured to output X voltage threshold signals, and the X voltage threshold signals have different threshold values, and X is an integer greater than or equal to <NUM>. The selection circuit is connected to the segmented voltage threshold circuit and configured to receive an input voltage signal and the X voltage threshold signals and output X+<NUM> conduction signals. Each conduction signal of the X+<NUM> conduction signals is output based on a comparison result between the input voltage signal and one of the X voltage threshold signals. The segmented voltage conditioning circuit includes X+<NUM> segmented voltage conditioning sub-circuits. Each of the X+<NUM> segmented voltage conditioning sub-circuit is configured to condition the input voltage signal to output a corresponding output voltage signal based on a corresponding conduction signal of the X +<NUM> conduction signals.

In some embodiments, X is equal to <NUM>. The X segmented voltage threshold sub-circuits comprise a first segmented voltage threshold sub-circuit and a second segmented voltage threshold sub-circuit, the X voltage threshold signals comprise a first voltage threshold signal and a second voltage threshold signal, and a threshold value of the first voltage threshold signal is less than a threshold value of the second voltage threshold signal, wherein the first segmented voltage threshold sub-circuit is configured to output the first voltage threshold signal, the second segmented voltage threshold sub-circuit is configured to output the second voltage threshold signal. The X+<NUM> conduction signals comprise a first conduction signal, a second conduction signal, and a third conduction signal, wherein the first conduction signal is output in response to a voltage value of the input voltage signal being less than the threshold value of the first voltage threshold signal, the second conduction signal is output in response to a voltage value of the input voltage signal being greater than the threshold value of the first voltage threshold signal and less than the threshold value of the second voltage threshold signal, and the third conduction signal is output in response to a voltage value of the input voltage signal being greater than the threshold value of the second voltage threshold signal. The X+<NUM> segmented voltage conditioning sub-circuits comprise a first segmented voltage conditioning sub-circuit, a second segmented voltage conditioning sub-circuit, and a third segmented voltage conditioning sub-circuit, wherein the first segmented voltage conditioning sub-circuit is configured to condition the input voltage signal to output a first output voltage signal based on the first conduction signal, the second segmented voltage conditioning sub-circuit is configured to condition the input voltage signal to output a second output voltage signal based on the second conduction signal, and the third segmented voltage conditioning sub-circuit is configured to condition the input voltage signal to output a third output voltage signal based on the third conduction signal.

In some embodiments, the first segmented voltage conditioning sub-circuit includes a third switching tube and a first proportional operational amplifier sub-circuit, wherein a gate of the third switching tube is connected to the selection circuit, a source of the third switching tube is connected to an input terminal of the first proportional operational amplifier sub-circuit, and an output terminal of the first proportional operational amplifier sub-circuit is configured to output a first proportional amplified voltage signal. The second segmented voltage conditioning sub-circuit comprises a fourth switching tube and a second proportional operational amplifier sub-circuit, wherein a gate of the fourth switching tube is connected to the selection circuit, a source of the fourth switching tube is connected to an input terminal of the second proportional operational amplifier sub-circuit, and an output terminal of the second proportional operational amplifier sub-circuit is configured to output a second proportional amplified voltage signal. The third segmented voltage conditioning sub-circuit comprises a fifth switching tube and a third proportional operational amplifier sub-circuit, wherein a gate of the fifth switching tube is connected to the selection circuit, a source of the fifth switching tube is connected to an input terminal of the third proportional operational amplifier sub-circuit, and an output terminal of the third proportional operational amplifier sub-circuit is configured to output a third proportional amplified voltage signal.

In some embodiments, the second segmented voltage conditioning sub-circuit further includes a first differential amplifier sub-circuit and a first continuously-output conditioning circuit, wherein a first input terminal of the first differential amplifier sub-circuit is connected to the output terminal of the second proportional operational amplifier sub-circuit, a second input terminal of the first differential amplifier sub-circuit is connected to the first continuously-output conditioning circuit, and an output terminal of the first differential amplifier sub-circuit is configured to output a conditioned second proportional amplification voltage signal which is obtained as the second proportional amplification voltage signal is conditioned. The third segmented voltage conditioning sub-circuit further comprises a second differential amplifier sub-circuit and a second continuously-output conditioning circuit, wherein a first input terminal of the second differential amplifier sub-circuit is connected to the output terminal of the third proportional operational amplifier sub-circuit, a third input terminal of the second differential amplifier sub-circuit is connected to the second continuously-output conditioning circuit, and an output terminal of the second differential amplifier sub-circuit is configured to output a conditioned third proportional amplification voltage signal which is obtained as the third proportional amplification voltage signal is conditioned.

In some embodiments, the first proportional operational amplifier sub-circuit comprises a first proportional operational amplifier, a ninth resistor, and a tenth resistor, wherein a positive input terminal of the first proportional operational amplifier is used as the input terminal of the first proportional operational amplifier sub-circuit, a negative input terminal of the first proportional operational amplifier is connected to one terminal of the ninth resistor and one terminal of the tenth resistor, another terminal of the ninth resistor is grounded, and another terminal of the tenth resistor is connected to an output terminal of the first proportional operational amplifier. The second proportional operational amplifier sub-circuit comprises a second proportional operational amplifier, an eleventh resistor, and a twelfth resistor, wherein a positive input terminal of the second proportional operational amplifier is used as the input terminal of the second proportional operational amplifier sub-circuit, a negative input terminal of the second proportional operational amplifier is connected to one terminal of the eleventh resistor and one terminal of the twelfth resistor, another terminal of the eleventh resistor is grounded, and another terminal of the twelfth resistor is connected to an output terminal of the second proportional operational amplifier. The third proportional operational amplifier sub-circuit comprises a third proportional operational amplifier, a thirteenth resistor, and a fourteenth resistor, wherein a positive input terminal of the third proportional operational amplifier is used as the input terminal of the third proportional operational amplifier sub-circuit, a negative input terminal of the third proportional operational amplifier is connected to one terminal of the thirteenth resistor and one terminal of the fourteenth resistor, another terminal of the thirteenth resistor is grounded, and another terminal of the fourteenth resistor is connected to an output terminal of the third proportional operational amplifier.

In some embodiments, the first continuously-output conditioning circuit comprises a fifth resistor and a sixth resistor which are series-connected, one end of the series-connected fifth resistor and the sixth resistor is connected to a DC power supply and another end of the series-connected fifth resistor and the sixth resistor is grounded. The first differential amplifier sub-circuit comprises a first differential amplifier, a fifteenth resistor, a sixteenth resistor, an seventeenth resistor, and an eighteenth resistor, wherein a positive input terminal of the first differential amplifier is connected to one terminal of the fifteenth resistor and one terminal of the sixteenth resistor, another terminal of the fifteenth resistor is connected to the output terminal of the second proportional operational amplifier sub-circuit, another terminal of the sixteenth resistor is grounded, a negative input terminal of the first differential amplifier is connected to one terminal of the seventeenth resistor and one terminal of the eighteenth resistor, another terminal of the seventeenth resistor is connected between the third resistor and the fourth resistor, and another terminal of the eighteenth resistor is connected to an output terminal of the first differential amplifier. The second continuously-output conditioning circuit comprises a seventh resistor and an eighth resistor which are series-connected, one end of the series-connected seventh resistor and the eighth resistor is connected to a DC power supply and another end of the series-connected seventh resistor and the eighth resistor is grounded. The second differential amplifier sub-circuit comprises a second differential amplifier, a nineteenth resistor, a twentieth resistor, a twenty-first resistor, and a twenty-second resistor, wherein a positive input terminal of the second differential amplifier is connected to one terminal of the nineteenth resistor and one terminal of the twentieth resistor, another terminal of the nineteenth resistor is connected to the output terminal of the second proportional operational amplifier sub-circuit, another terminal of the twentieth resistor is grounded, a negative input terminal of the second differential amplifier is connected to one terminal of the twenty-first resistor and one terminal of the twenty-second resistor, another terminal of the twenty-first resistor is connected between the third resistor and the fourth resistor, and another terminal of the twenty-second resistor is connected to an output terminal of the second differential amplifier.

In some embodiments, the fifteenth resistor, the sixteenth resistor, the seventeenth resistor, and the eighteenth resistor have the same resistor value. The nineteenth resistor, the twentieth resistor, the twenty-first resistor, and the twenty-second resistor have the same resistor value.

In some embodiments, the first segmented voltage threshold sub-circuit comprises a first resistor and a second resistor which are series-connected, wherein one end of the series-connected first resistor and the second resistor is connected to a DC power supply and another end of the series-connected first resistor and the second resistor is grounded. The second segmented voltage threshold sub-circuit comprises a third resistor and a fourth resistor which are series-connected, wherein one end of the series-connected third resistor and the fourth resistor is connected to the DC power supply through the selection circuit and another end of the series-connected third resistor and the fourth resistor is grounded.

In some embodiments, the selection circuit comprises a first comparator, a second comparator, a third comparator, a fourth comparator, a first switching tube, and a second switching tube. A first input terminal of the first comparator is used to receive the input voltage signal, a second input terminal of the first comparator is connected to the first segmented voltage threshold sub-circuit, an output terminal of the first comparator is connected to the first segmented voltage conditioning sub-circuit. A first input terminal of the second comparator is connected to the first segmented voltage threshold sub-circuit, a second input terminal of the second comparator is used to receive the input voltage signal, and an output terminal of the second comparator is connected to a gate of the first switching tube and a gate of the second switching tube. A first input terminal of the third comparator is connected to the second segmented voltage threshold sub-circuit, a second input terminal of the second comparator is connected to a source of the first switching tube, and an output terminal of the third comparator is connected to the third segmented voltage conditioning sub-circuit. A first input terminal of the fourth comparator is connected to a source of the first switching tube, a second input terminal of the fourth comparator is connected to the second segmented voltage threshold sub-circuit, an output terminal of the fourth comparator is connected to the second segmented voltage conditioning sub-circuit. The source of the first switching tube is further grounded, a drain of the first switching tube is used to receive the input voltage signal. A source of the second switching tube is grounded and connected to the one end of the series-connected third resistor and the fourth resistor, a drain of the second switching tube is connected to the DC power supply.

In some embodiments, the first segmented voltage conditioning sub-circuit further comprises a first voltage following sub-circuit, wherein a positive input terminal of the first voltage following sub-circuit is connected to the output terminal of the first proportional operational amplifier sub-circuit, and a negative input terminal of the first voltage following sub-circuit is connected to the output terminal of the first voltage following sub-circuit. The second segmented voltage conditioning sub-circuit further comprises a second voltage following sub-circuit, wherein a positive input terminal of the second voltage following sub-circuit is connected to the output terminal of the second proportional operational amplifier sub-circuit, and a negative input terminal of the second voltage following sub-circuit is connected to the output terminal of the second voltage following sub-circuit. The third segmented voltage conditioning sub-circuit further comprises a third voltage following sub-circuit, wherein a positive input terminal of the third voltage following sub-circuit is connected to the output terminal of the third proportional operational amplifier sub-circuit, and a negative input terminal of the third voltage following sub-circuit is connected to the output terminal of the third voltage following sub-circuit.

In some embodiments, both the first comparator, the second comparator, the third comparator, and the fourth comparator are operational comparators.

According to the present disclosure, a signal measurement device is provided and includes the signal conditioning circuit of any one of the above embodiments.

In the following, the present disclosure will be described by taking X=<NUM> as examples.

In order to solve problem of the voltage sampling and condition method in the art as mentioned in the above, in an embodiment, as shown in <FIG>, a segmented selectable signal conditioning circuit is provided and includes a segmented voltage threshold circuit <NUM>, a segmented voltage conditioning circuit <NUM>, and a selection circuit <NUM>.

The segmented voltage threshold circuit <NUM> includes at least two voltage threshold sub-circuits. Each voltage threshold sub-circuit is configured to output a corresponding voltage threshold signal. Voltage threshold signals of the at least two voltage threshold sub-circuits preset different threshold values. The segmented voltage conditioning circuit <NUM> includes a plurality of segmented voltage conditioning sub-circuits. Each segmented voltage conditioning sub-circuit is configured to condition an input voltage signal based on a corresponding conduction signal to obtain an output voltage signal. The selection circuit <NUM> is connected to the segmented voltage threshold circuit <NUM> and the segmented voltage conditioning circuit <NUM>. The selection circuit <NUM> is configured to: receive the input voltage signal and each voltage threshold signal; compare a value of the input voltage signal to the threshold value of each voltage threshold signal; and output the corresponding conduction signal based on a comparison result.

The segmented voltage threshold circuit <NUM> may include at least two corresponding voltage threshold sub-circuits. Each voltage threshold sub-circuit is connected to the selection circuit. A corresponding resistance value may be set for each voltage threshold sub-circuit, such that each voltage threshold sub-circuit outputs the voltage threshold signal having the corresponding threshold value to the selection circuit. The voltage threshold signals output by the voltage threshold sub-circuits are preset to have different threshold values. The threshold value of the voltage threshold signal refers to the corresponding voltage threshold value.

The segmented voltage conditioning circuit <NUM> may include at least three corresponding segmented voltage conditioning sub-circuits. Each segmented voltage conditioning sub-circuit is connected to the selection circuit. The segmented voltage conditioning sub-circuit may receive the conduction signal transmitted from the selection circuit, such that the segmented voltage conditioning sub-circuit may condition the input voltage signal based on the corresponding conduction signal to obtain an output voltage signal.

The selection circuit <NUM> may be configured with an input interface. The input interface is configured to receive the input voltage signal. Since the selection circuit <NUM> is connected to each voltage threshold sub-circuit, the selection circuit <NUM> may receive the input voltage signal and each voltage threshold signal; compare the input voltage signal with each voltage threshold signal respectively; and output corresponding conduction signals based on the comparison result. In this way, the voltage signal may be conditioned in a multi-segmented and selectable manner based on a signal conditioning channel having set segmented voltage ranges.

In the above embodiments, the segmented voltage threshold circuit <NUM>, the segmented voltage conditioning circuit <NUM>, and selection circuit <NUM> are arranged. Voltage signal conditioning is optimized. The voltage is automatically segmented and conditioned. Therefore, the circuit may be flexibly adapted for multi-segment voltage conditioning. The applicable sampling range of voltage sampling conditioning may be increased, and sampling accuracy and universality may be improved. In this way, scenarios that the voltage sampling conditioning can be applied may be increased, and universality of the circuit and accuracy of sampling conditioning may be improved.

In an embodiment, as shown in <FIG>, a segmented selectable signal conditioning circuit is provided. The segmented selectable signal conditioning circuit includes a segmented voltage threshold circuit <NUM>, a segmented voltage conditioning circuit <NUM>, and a selection circuit <NUM>. The segmented voltage threshold circuit <NUM> includes at least a first segmented voltage threshold sub-circuit <NUM> and a second segmented voltage threshold sub-circuit <NUM>. The segmented voltage conditioning circuit <NUM> includes at least a first segmented voltage conditioning sub-circuit <NUM>, a second segmented voltage conditioning sub-circuit <NUM>, and a third segmented voltage conditioning sub-circuit <NUM>.

The first segmented voltage threshold sub-circuit <NUM> is configured to output a first voltage threshold signal. The second segmented voltage threshold sub-circuit <NUM> is configured to output a second voltage threshold signal. A threshold value of the first voltage threshold signal is less than a threshold value of the second voltage threshold signal. The first segmented voltage conditioning sub-circuit <NUM> is configured to condition the input voltage signal, based on a received first conduction signal, to output a first output voltage signal. The second segmented voltage conditioning sub-circuit <NUM> is configured to condition the input voltage signal, based on a received second conduction signal, to output a second output voltage signal. The third segmented voltage conditioning sub-circuit <NUM> is configured to condition the input voltage signal, based on a received third conduction signal, to output a third output voltage signal. The selection circuit <NUM> is configured to receive the input voltage signal, the first voltage threshold signal, and the second voltage threshold signal. The selection circuit <NUM> is further configured to: output the first conduction signal in response to the voltage value of the input voltage signal being less than the threshold value of the first voltage threshold signal; output the second conduction signal in response to the voltage value of the input voltage signal being greater than the threshold value of the first voltage threshold signal and less than the threshold value of the second voltage threshold signal; and output the third conduction signal in response to the voltage value of the input voltage signal being greater than the threshold value of the second voltage threshold signal.

The segmented voltage threshold circuit <NUM> may include at least <NUM> corresponding sub-circuits. For example, the segmented voltage threshold circuit <NUM> may include the first segmented voltage threshold sub-circuit <NUM> and an N-th segmented voltage threshold sub-circuit. The N is a positive integer greater than or equal to <NUM>. Exemplarily, in the present embodiment, voltage signal conditioning will be illustrated by diving the voltage signal into three voltage ranges, and that is, the segmented voltage threshold circuit <NUM> includes the first segmented voltage threshold sub-circuit <NUM> and the second segmented voltage threshold sub-circuit <NUM>. When four voltage ranges are applied, the segmented voltage threshold circuit <NUM> includes three corresponding sub-circuits; when five voltage ranges are applied, the segmented voltage threshold circuit <NUM> includes four corresponding sub-circuits; and so on. Voltage signal conditioning processes for the four voltage ranges or the five voltage ranges may be referred to the processes for the three voltage ranges, and will not be repeated here.

The first segment voltage threshold sub-circuit <NUM> is connected to the selection circuit <NUM>. A resistance value may be set for the first segment voltage threshold sub-circuit <NUM>, such that the first segment voltage threshold sub-circuit <NUM> may output the first voltage threshold signal to the selection circuit <NUM>. The second segmented voltage threshold sub-circuit <NUM> is connected to the selection circuit <NUM>. A resistance value may be set for the second segmented voltage threshold sub-circuit <NUM>, such that the second segmented voltage threshold sub-circuit <NUM> may output the second voltage threshold signal to the selection circuit <NUM>. The threshold value of the first voltage threshold signal is less than the threshold value of the second voltage threshold signal. The threshold value of the first voltage threshold signal and the threshold value of the second voltage threshold signal refer to corresponding voltage threshold values.

The segmented voltage conditioning circuit <NUM> may include at least <NUM> corresponding sub-circuits. For example, the segmented voltage conditioning circuit <NUM> may include the first segmented voltage conditioning sub-circuit <NUM>, the second segmented voltage conditioning sub-circuit <NUM>, and an M-th segmented voltage conditioning sub-circuit. The M is a positive integer greater than or equal to <NUM>. Exemplarily, in the present embodiment, voltage signal conditioning will be illustrated by diving the voltage signal into three voltage ranges, and that is, the segmented voltage conditioning circuit <NUM> includes the first segmented voltage conditioning sub-circuit <NUM>, the second segmented voltage conditioning sub-circuit <NUM>, and the third segmented voltage conditioning sub-circuit <NUM>. When four voltage ranges are applied, the segmented voltage conditioning circuit <NUM> includes four corresponding sub-circuits; when five voltage ranges are applied, the segmented voltage conditioning circuit <NUM> includes five corresponding sub-circuits; and so on. Voltage signal conditioning processes for the four voltage ranges or the five voltage ranges may be referred to the processes for the three voltage ranges, and will not be repeated here.

The selection circuit <NUM> may be configured with an input interface, and the input interface may be configured to receive the input voltage signal. Since the selection circuit <NUM> is connected to the first segmented voltage threshold sub-circuit <NUM> and the second segmented voltage threshold sub-circuit <NUM>, the selection circuit <NUM> may receive the input voltage signal, the first voltage threshold signal, and the second voltage threshold signal and compare the input voltage signal with the first voltage threshold signal and the second voltage threshold signal respectively for processing. Further, the selection circuit <NUM> may output, based on the comparison result, the first conduction signal to the first segmented voltage conditioning sub-circuit <NUM> in response to the value of the input voltage signal being less than the threshold value of the first voltage threshold signal, such that the first segmented voltage conditioning sub-circuit <NUM> may condition, based on the received first conduction signal, the input voltage signal and output the first output voltage signal. The selection circuit <NUM> may output the second conduction signal in response to the value of the input voltage signal being greater than the threshold value of the first voltage threshold signal and less than the threshold value of the second voltage threshold signal, such that the second segment voltage conditioning sub-circuit <NUM> may condition the input voltage signal, based on the received second conduction signal, and output the second output voltage signal. The selection circuit <NUM> may output a third conduction signal in response to the value of the input voltage signal being greater than the threshold value of the second voltage threshold signal, such that the third segmented voltage conditioning sub-circuit <NUM> may condition the input voltage signal, based on the received third conduction signal, and output a third output voltage signal. In this way, the voltage signal may be conditioned in a multi-segmented and selectable manner based on the signal conditioning channel having set segmented voltage ranges.

In the above embodiment, the segmented voltage threshold circuit <NUM>, the segmented voltage conditioning circuit <NUM>, and the selection circuit <NUM> are arranged. Voltage signal conditioning is optimized. The voltage may be automatically segmented and conditioned. The circuit may be flexibly adapted for multi-segment voltage conditioning. The applicable sampling range of voltage sampling conditioning may be increased, and sampling accuracy and universality may be improved. Scenarios that voltage sampling conditioning can be applied may be increased. Universality of the circuit and the accuracy of sampling conditioning may be improved.

In an embodiment, as shown in <FIG>, the selection circuit <NUM> includes a first comparator B1, a second comparator B2, a third comparator B3, a fourth comparator B4, a first switching tube Q1, and a second switching tube Q2.

A first input terminal of the first comparator B1 is configured to receive the input voltage signal, a second input terminal of the first comparator B1 is connected to an output terminal of the first segment voltage threshold sub-circuit <NUM>, and an output terminal of the first comparator B1 is connected to the first segment voltage conditioning sub-circuit <NUM>. A power supply end of the first segment voltage threshold sub-circuit <NUM> is configured to connect to a direct current power supply VCC. A first input terminal of the second comparator B2 is connected to the output terminal of the first segment voltage threshold sub-circuit <NUM>, a second input terminal of the second comparator B2 is configured to receive the input voltage signal, and an output terminal of the second comparator B2 is connected to a gate of the first switching tube Q1 and a gate of the second switching tube Q2. A first input terminal of the third comparator B3 is connected to an output terminal of the second segmented voltage threshold subcircuit <NUM>, a second input terminal of the third comparator B3 is connected to a source of the first switching tube Q1, and an output terminal of the third comparator B3 is connected to the third segmented voltage conditioning subcircuit <NUM>. A first input terminal of the fourth comparator B4 is connected to the source of the first switching tube Q1, a second input terminal of the fourth comparator B4 is connected to the output terminal of the second segmented voltage threshold subcircuit <NUM>, and an output terminal of the fourth comparator B4 is connected to the second segmented voltage conditioning subcircuit <NUM>. A drain of the first switching tube Q1 is connected to the input voltage signal. A drain of the second switching tube Q2 is connected to the direct current power supply VCC. A source of the second switching tube Q2 is connected to a power supply end of the second segmented voltage threshold sub-circuit <NUM>.

Each of the first comparator B1, the second comparator B2, the third comparator B3, and the fourth comparator B4 may be an operational comparator. Each of the first switching tube Q1 and the second switching tube Q2 may be a MOS tube. For example, each of the first switching tube Q1 and the second switching tube Q2 may be an N-type MOS tube.

For example, in the following illustration, each of the first comparator B1, the second comparator B2, the third comparator B3, and the fourth comparator B4 may be the operational comparator; and each of the first switching tube Q1 and the second switching tube Q2 is the N-type MOS tube. The first input terminal of the first comparator B1 refers to an inverting input terminal of the first comparator B <NUM>, and the second input terminal of the first comparator B1 refers to the in-phase input terminal of the first comparator B1. The first input terminal of the second comparator B2 refers to an inverting input terminal of the second comparator B2, and the second input terminal of the second comparator B2 refers to an in-phase input terminal of the second comparator B2. The first input terminal of the third comparator B3 refers to an inverting input terminal of the third comparator B3, and the second input terminal of the third comparator B3 refers to an in-phase input terminal of the third comparator B3. The first input terminal of the fourth comparator B4 refers to an inverting input terminal of the fourth comparator B4, and the second input terminal of the fourth comparator B4 refers to an in-phase input terminal of the fourth comparator B4.

Since the power supply end of the first segmented voltage threshold sub-circuit <NUM> is connected to the direct current power supply VCC, the first segmented voltage threshold sub-circuit <NUM> may divide a voltage of the direct current power supply VCC to output the first voltage threshold signal. Since the first input terminal of the first comparator B1 receive the input voltage signal, the second input terminal of the first comparator B1 receives the first voltage threshold signal, the first comparator B1 compares the voltage value of the input voltage signal to voltage value of the first voltage threshold signal. In response to the voltage value of the input voltage signal being greater than the voltage value of the first voltage threshold signal, the first segmented voltage conditioning sub-circuit <NUM> is disconnected. In response to the voltage value of the input voltage signal being less than the voltage value of the first voltage threshold signal, the first comparator B1 transmits the first conduction signal to the first segment voltage conditioning sub-circuit <NUM>, such that the first segment voltage conditioning sub-circuit <NUM> conditions the input voltage signal based on the received first conduction signal to output the first output voltage signal. Exemplarily, the first conduction signal may be a high voltage level signal. For example, the first comparator B1 transmits a low voltage level signal to the first voltage conditioning sub-circuit <NUM> in response to the voltage value of the input voltage signal being greater than the voltage value of the first voltage threshold signal, such that the first voltage conditioning sub-circuit <NUM> remains being disconnected. The first comparator B1 transmits a high voltage level signal to the first voltage conditioning sub-circuit <NUM> in response to the voltage value of the input voltage signal being less than the voltage value of the first voltage threshold signal, such that the first voltage conditioning sub-circuit <NUM> is conducted and is operating.

Since the first input terminal of the second comparator B2 receives the first voltage threshold signal, the second input terminal of the second comparator B2 receives the input voltage signal, the second comparator B2 compares the voltage value of the input voltage signal to the voltage value of the first voltage threshold signal. In response to the voltage value of the input voltage signal being less than the voltage value of the first voltage threshold signal, each of the first switching tube Q1 and the second switching tube Q2 is disconnected, such that the second segmented voltage regulation sub-circuit <NUM> and the third segmented voltage regulation sub-circuit <NUM> are disconnected. The second comparator B2 controls the first switching tube Q1 and the second switching tube Q2 to be connected in response to the voltage value of the input voltage signal being greater than the voltage value of the first voltage threshold signal. For example, the second comparator B2 transmits the low voltage level signal to the gate of the first switching tube Q1and the gate of the second switching tube Q2 in response to the voltage value of the input voltage signal being less than the voltage value of the first voltage threshold signal, such that the first switching tube Q1 and the second switching tube Q2 remain being disconnected. The second comparator B2 transmits the high voltage level signal to the gate of the first switching tube Q1 and the gate of the second switching tube Q2 in response to the voltage value of the input voltage signal being greater than the voltage value of the first voltage threshold signal, such that the first switching tube Q1 and the second switching tube Q2 are conducted and operating.

Since the drain of the second switching tube Q2 is connected to the direct current power supply VCC and the source of the second switching tube Q2 is connected to the power supply end of the second segmented voltage threshold sub-circuit <NUM>, the second segmented voltage threshold sub-circuit <NUM> is conducted in response to the second switching tube Q2 being conducted, such that the second segmented voltage threshold sub-circuit <NUM> transmits the second voltage threshold signal to the first input terminal of the third comparator B3 and the second input terminal of the fourth comparator B4 respectively. Since the drain of the first switching tube Q1 is configured to receive the input voltage signal, the first switching tube Q1 is conducted in response to the second switching tube Q2 being conducted. In this case, the first input terminal of the third comparator B3 receives the second voltage threshold signal, and the second input terminal of the third comparator B3 receives the input voltage signal. Further, the third comparator B3 compares the voltage value of the input voltage signal and the voltage value of the second voltage threshold signal. The third segmented voltage conditioning sub-circuit <NUM> remains being disconnected in response to the voltage value of the input voltage signal being less than the voltage value of the second voltage threshold signal. The third comparator B3 transmits the third conduction signal to the third segmented voltage conditioning sub-circuit <NUM> in response to the voltage value of the input voltage signal being greater than the voltage value of the second voltage threshold signal, such that the third voltage conditioning circuit <NUM> conditions the input voltage signal based on the received third conduction signal to output the third output voltage signal.

Since the drain of the first switching tube Q1 is configured to receive the input voltage signal, the first switching tube Q1 is conducted in response to the second switching tube Q2 being conducted. In this case, the second input terminal of the fourth comparator B4 receives the second voltage threshold signal, and the first input terminal of the fourth comparator B4 receives the input voltage signal. Further, the fourth comparator B4 compares the voltage value of the input voltage signal to the voltage value of the second voltage threshold signal. The second segmented voltage conditioning sub-circuit <NUM> is disconnected in response to the voltage value of the input voltage signal being greater than the voltage value of the second voltage threshold signal. The fourth comparator B4 transmits the second conduction signal to the second segmented voltage conditioning sub-circuit <NUM> in response to the voltage value of the input voltage signal being less than the voltage value of the second voltage threshold signal, such that the second segmented voltage conditioning sub-circuit <NUM> conditions the input voltage signal based on the received second conduction signal to output the second output voltage signal.

In the above embodiment, the segmented voltage threshold circuit <NUM>, the segmented voltage conditioning circuit <NUM>, and the selection circuit <NUM>. The selection circuit <NUM> includes the first comparator B1, the second comparator B2, the third comparator B3, the fourth comparator B4, the first switching tube Q1, and the second switching tube Q2. The input voltage signal is compared and processed by defining a plurality of input voltage ranges. When the voltage value of the input voltage signal falls into a corresponding input voltage range, the voltage conditioning sub-circuit corresponding to the range (the first voltage conditioning sub-circuit, the second voltage conditioning sub-circuit, and the third voltage conditioning sub-circuit) is conducted to achieve segmented and selectable voltage signal conditioning. In the present disclosure, the voltage signal conditioning is optimized, the voltage is automatically segmented and conditioned. The circuit may be flexibly adapted for multi-segment voltage conditioning. The applicable sampling range of the voltage sampling conditioning is increased, and the sampling accuracy and universality is improved. Therefore, scenarios that voltage sampling and conditioning are increased, and universality and accuracy of the circuit are improved.

In an example, as shown in <FIG>, the first segment voltage threshold sub-circuit <NUM> includes a first resistor R1 and a second resistor R2. A first terminal of the first resistor R1 is connected to the direct current power supply VCC, a second terminal of the first resistor R1 is connected to a first terminal of the second resistor R2. A second terminal of the second resistor R2 is connected to the ground. The second input terminal of the first comparator B1 and the first input terminal of the second comparator B2 are connected between the first terminal of the first resistor R1 and the first terminal of the second resistor R2.

Due to the connection between the first resistor R1 and the second resistor R2, when a resistance value of the first resistor R1 is r1, a resistance value of the second resistor R2 is r2, and a voltage value of the direct current power supply VCC is vcc, the voltage threshold value of the first voltage threshold signal of the first segmented voltage threshold sub-circuit <NUM> is: <MAT>.

Exemplarily, each of the first resistor R1 and the second resistor R2 may be an adjustable resistor.

In an example, as shown in <FIG>, the second segmented voltage threshold sub-circuit <NUM> includes a third resistor R3 and a fourth resistor R4. A first terminal of the third resistor R3 is connected to the source of the second switching tube Q2, and a second terminal of the third resistor R3 is connected to a first terminal of the fourth resistor R4. A second terminal of the fourth resistor R4 is connected to the ground. The first input terminal of the third comparator B3 and the second input terminal of the fourth comparator B4 are connected between the second terminal of the third resistor R3 and the first terminal of the fourth resistor R4.

Due to the connection between the third resistor R3 and the fourth resistor R4, when a resistance value of the third resistor R3 is r3, a resistance value of the fourth resistor R4 is r4, and a voltage value of the direct current power supply VCC is vcc, the voltage threshold value of the second voltage threshold signal of the second segmented voltage threshold sub-circuit <NUM> is: <MAT>.

Exemplarily, each of the third resistor R3 and the fourth resistor R4 may be an adjustable resistor.

Based on the voltage threshold value set for the first segment voltage threshold sub-circuit <NUM> and the voltage threshold value set for the second segment voltage threshold sub-circuit <NUM>, a detection range of the input voltage (VIN) may be divided into three ranges as follows: a first range is VIN < VTH1; a second segment is VTH1 < VIN < VTH2; and a third segment is VIN > VTH2.

In an example, as shown in <FIG>, the first segmented voltage conditioning sub-circuit <NUM> includes a third switching tube Q3 and a first proportional operational amplifier sub-circuit <NUM>. A gate of the third switching tube Q3 is connected to the output terminal of the first comparator B <NUM>, and a drain of the third switching tube Q3 is configured to access the input voltage signal. A source of the third switching tube Q3 is connected to an in-phase input terminal of the first proportional amplifier sub-circuit <NUM>, an output terminal of the first proportional amplifier sub-circuit <NUM> is configured to output a first proportional amplified voltage signal.

The first proportional operational amplifier sub-circuit <NUM> is configured to amplify the input voltage signal in a first preset proportion.

When the voltage value VIN of the input voltage signal is less than the voltage threshold value VTH1 of the first voltage threshold signal, the first comparator B1 outputs the high voltage level signal (i.e., the first conduction signal), and the gate of the third switching tube Q3 receives the first conduction signal, and therefore, the third switching tube Q3 is conducted. The drain of the third switching tube Q3 is configured to access the input voltage signal. The source of the third switching tube Q3 is connected to the in-phase input terminal of the first proportional operational amplifier sub-circuit <NUM>. In this way, the in-phase input terminal of the first proportional operational amplifier sub-circuit <NUM> receives the input voltage signal, and the input voltage signal is amplified by the first proportional operational amplifier sub-circuit <NUM> based on the first preset proportion, such that the first proportional amplified voltage signal is output.

In an example, as shown in <FIG>, the second segmented voltage conditioning sub-circuit <NUM> includes a fourth switching tube Q4, a second proportional amplifier sub-circuit <NUM>, a first differential amplifier sub-circuit <NUM>, and a first continuously-output conditioning circuit <NUM>. A gate of the fourth switching tube Q4 is connected to the output terminal of the fourth comparator B4, and a drain of the fourth switching tube Q4 is configured to access the input voltage signal. A source of the fourth switching tube Q4 is connected to an in-phase input terminal of the second proportional amplifier sub-circuit <NUM>, and an output terminal of the second proportional amplifier sub-circuit <NUM> is configured to transmit a second proportional amplified voltage signal to an in-phase input terminal of the first differential amplifier sub-circuit <NUM>. An inverting input terminal of the first differential amplifier circuit <NUM> is connected to the first continuously-output conditioning circuit <NUM>. An output terminal of the first differential amplifier circuit <NUM> is configured to output the conditioned second proportional amplified voltage signal.

The second proportional operational amplifier sub-circuit <NUM> is configured to amplify the input voltage signal in a second preset proportion. The first differential amplifier sub-circuit <NUM> has circuit symmetry and may stabilize an operating point. The first continuously-output conditioning circuit <NUM> is configured to condition an output voltage, such that the output voltage continuous. For example, the first continuously-output conditioning circuit <NUM> is configured to output a first continuously-output conditioned signal.

When the voltage value VIN of the input voltage signal is greater than the voltage threshold value VTH1 of the first voltage threshold signal and is less than the voltage threshold value VTH2 of the second voltage threshold signal, the fourth comparator B4 outputs the high voltage level signal (i.e., the second conduction signal), and the gate of the fourth switching tube Q4 receives the second conduction signal, such that the fourth switching tube Q4 is conducted. The drain of the fourth switching tube Q4 is configured to access the input voltage signal. The source of the fourth switching tube Q4 is connected to the in-phase input terminal of the second proportional amplifier sub-circuit <NUM>. In this way, the in-phase input terminal of the second proportional amplifier sub-circuit <NUM> receives the input voltage signal, and the input voltage signal is amplified by the second proportional amplifier sub-circuit <NUM> based on the second preset proportion, such that the second proportional amplified voltage signal is input to the in-phase input terminal of the first differential amplifier sub-circuit <NUM>. Since the inverting input terminal of the first differential amplifier sub-circuit <NUM> is connected to the first continuously-output conditioning circuit <NUM>, the inverting input terminal of the first differential amplifier sub-circuit <NUM> is connected to the first continuously-output conditioned signal. A differential amplification process is performed on the first continuously-output conditioned signal, such that the output terminal of the first differential amplifier sub-circuit <NUM> outputs the conditioned second proportional amplified voltage signal.

In an example, as shown in <FIG>, the third segment voltage conditioning sub-circuit <NUM> includes a fifth switching tube Q5, a third proportional amplifier sub-circuit <NUM>, a second differential amplifier sub-circuit <NUM>, and a second continuously-output conditioning circuit <NUM>. A gate of the fifth switching tube Q5 is connected to the output terminal of the third comparator B3, and a drain of the fifth switching tube Q5 is configured to access the input voltage signal. A source of the fifth switching tube Q5 is connected to an in-phase input terminal of the third proportional amplifier sub-circuit <NUM>. An output terminal of the third proportional amplifier sub-circuit <NUM> is configured to transmit a third proportional amplified voltage signal to an in-phase input terminal of the second differential amplifier sub-circuit <NUM>. An inverting input terminal of the second differential amplifier circuit <NUM> is connected to the second continuously-output adjustment circuit <NUM>. An output terminal of the second differential amplifier circuit <NUM> is configured to output the conditioned third proportional amplified voltage signal.

The third proportional operational amplifier sub-circuit <NUM> is configured to amplify the input voltage signal in a third preset proportion. The second differential amplification sub-circuit <NUM> has circuit symmetry and may stabilize the operating point. The second continuously-output conditioning circuit <NUM> is configured to condition the output voltage, such that the output voltage is continuous. For example, the second continuously-output conditioning circuit <NUM> is configured to output a second continuously-output conditioned signal.

When the voltage value VIN of the input voltage signal is greater than the voltage threshold value VTH2 of the second voltage threshold signal, the third comparator B3 outputs the high voltage level signal (i.e., the third conduction signal), and the gate of the fifth switching tube Q5 receives the third conduction signal, such that the fifth switching tube Q5 is conducted. The drain of the fifth switching tube Q5 is configured to access the input voltage signal, and the source of the fifth switching tube Q5 is connected to the in-phase input terminal of the third proportional operational amplifier sub-circuit <NUM>, such that the in-phase input terminal of the third proportional operational amplifier sub-circuit <NUM> receives the input voltage signal. The input voltage signal is amplified by the third proportional operational amplifier sub-circuit <NUM> based on a third preset proportion, such that the third proportional amplified voltage signal is transmitted to the in-phase input terminal of the second differential amplifier sub-circuit <NUM>. The inverting input terminal of the second differential amplifier sub-circuit <NUM> is connected to the second continuously-output conditioning circuit <NUM>, such that the inverting input terminal of the second differential amplifier sub-circuit <NUM> accesses the second continuously-output conditioning signal. The second continuously-output conditioning signal is differentially amplified by the second differential amplifier sub-circuit <NUM>. In this way, the output terminal of the second differential amplifier sub-circuit <NUM> outputs the conditioned third proportional amplified voltage signal.

In the present disclosure, the voltage signal conditioning is optimized. The voltage signal is automatically segmented and conditioned. The circuit may be flexibly adapted for multi-segment voltage conditioning. The applicable sampling range of the voltage sampling conditioning is increased, and the sampling accuracy and universality is improved. By configuring the first continuously-output conditioning circuit <NUM> and the second continuously-output conditioning circuit <NUM>, the voltage may be output continuously, the scenarios that voltage sampling conditioning can be applied may be increased, and universality and accuracy of sampling conditioning of the circuit may be improved.

In an example, as shown in <FIG>, the first segment voltage conditioning sub-circuit <NUM> further includes a first voltage following sub-circuit <NUM>. The second segment voltage conditioning sub-circuit <NUM> further includes a second voltage following sub-circuit <NUM>. The third segmented voltage conditioning sub-circuit <NUM> further includes a third voltage following sub-circuit <NUM>. An in-phase input terminal of the first voltage following sub-circuit <NUM> is connected to the output terminal of the first proportional amplifier sub-circuit <NUM>. The in-phase input terminal of the second voltage following sub-circuit <NUM> is connected to the output terminal of the second differential amplifier sub-circuit <NUM>. An in-phase input terminal of the second voltage following sub-circuit <NUM> is connected to the output terminal of the first differential amplifier sub-circuit <NUM>. An in-phase input terminal of the third voltage following sub-circuit <NUM> is connected to the output terminal of the second differential amplifier sub-circuit <NUM>.

Since the in-phase input terminal of the first voltage following sub-circuit <NUM> connected to the output terminal of the first proportional amplifier sub-circuit <NUM>, the first voltage following sub-circuit <NUM> serves as a buffering isolation, such that the first proportional amplifier sub-circuit <NUM> and any circuit after the first proportional amplifier sub-circuit <NUM> do not affect each other, reliability of voltage signal conditioning may be improved. Since the in-phase input terminal of the second voltage following sub-circuit <NUM> is connected to the output terminal of the first differential amplifier sub-circuit <NUM>, the second voltage following sub-circuit <NUM> serves as a buffering isolation, such that the first differential amplifier sub-circuit <NUM> and any circuit connected after the first differential amplifier sub-circuit <NUM> do not affect each other, and reliability of the voltage signal conditioning may be improved. Since the in-phase input terminal of the third voltage following sub-circuit <NUM> is connected to the output terminal of the second differential amplifier sub-circuit <NUM>, the third voltage following sub-circuit <NUM> serves as a buffering isolation, such that the second differential amplifier sub-circuit <NUM> and any circuit connected after the second differential amplifier sub-circuit <NUM> do not affect each other, and reliability of voltage signal conditioning may be improved.

In an example, as shown in <FIG>, the first continuously-output conditioning circuit <NUM> includes a fifth resistor R5 and a sixth resistor R6. The second continuously-output conditioning circuit <NUM> includes a seventh resistor R7 and an eighth resistor R8.

A first terminal of the fifth resistor R5 is connected to the direct current power supply VCC. A second terminal of the fifth resistor R5 is connected to a first terminal of the sixth resistor R6. A second terminal of the sixth resistor R6 is connected to the ground. The inverting input terminal of the first differential amplifier sub-circuit <NUM> is connected between the second terminal of the fifth resistor R5 and the first terminal of the sixth resistor R6. A first terminal of the seventh resistor R7 is connected to the direct current power supply VCC. A second terminal of the seventh resistor R7 is connected to a first terminal of the eighth resistor R8. A second terminal of the eighth resistor R8 is connected to the ground. The inverting input terminal of the second differential amplifier sub-circuit <NUM> is connected between the second terminal of the seventh resistor R7 and the first terminal of the eighth resistor R8.

Due to the connection between the fifth resistor R5 and the sixth resistor R6, when a resistance value of the fifth resistor R5 is r5, a resistance value of the sixth resistor R6 is r6, and a voltage value of the direct current power supply VCC is vcc, a voltage conditioning value of the first continuously-output conditioning signal of the first continuously-output conditioning circuit <NUM> is <MAT>.

Due to the connection between the seventh resistor R7 and the eighth resistor R8, when a resistance value of the seventh resistor R7 is r7, a resistance value of the eighth resistor R8 is r8, and a voltage value of the direct current power supply VCC is vcc, a voltage conditioning value of the second continuously-output conditioning signal of the second continuously-output conditioning circuit <NUM> is: <MAT>.

Exemplarily, each of the fifth resistor R5 and the sixth resistor R6 may be an adjustable resistor; and each of the seventh resistor R7 and the eighth resistor R8 may be an adjustable resistor.

In an example, as shown in <FIG>, the first segmented voltage threshold sub-circuit <NUM> includes the first resistor R1 and the second resistor R2. The second segmented voltage threshold sub-circuit <NUM> includes the third resistor R3 and the fourth resistor R4. A resistance value of the first resistor R1 is r1. A resistance value of the second resistor R2 is r2. A resistance value of the third resistor R3 is r3. A resistance value of the fourth resistor R4 is r4. A resistance value of the fifth resistor R5 is r5. A resistance value of the sixth resistor R6 is r6. A resistance value of the seventh resistor R7 is r7. A resistance value of the eighth resistor R8 is r8. A voltage of the direct current power supply VCC is vcc.

By setting the resistance value r1 for the first resistor R1, setting the resistance value r2 for the second resistor R2, setting the resistance value r3 for the third resistor R3, and setting the resistance value r4 for the fourth resistor R4, the voltage threshold value VTH1 may be set for the first voltage threshold signal, and the voltage threshold value VTH2 may be set for the second voltage threshold signal as follows: <MAT> and <MAT>.

The selection circuit <NUM> compares the input voltage value VIN to the voltage threshold value VTH1 of the first voltage threshold signal and the voltage threshold value VTH2 of the second voltage threshold signal. When VIN < VTH1, the third switching tube Q3 of the first voltage conditioning sub-circuit <NUM> is closed (connected), and the first switching tube Q1 and the second switching tube Q2 are both open (disconnected). In this case, the first voltage conditioning sub-circuit <NUM> is conducted and operating, and the second voltage conditioning sub-circuit <NUM> and the third voltage conditioning sub-circuit <NUM> are open (disconnected) and are not operating. When VTH1 < VIN < VTH2, the first switching tube Q1, the second switching tube Q2, and the fourth switching tube Q4 are closed, and the third switching tube Q3 and the fifth switching tube Q5 are open. In this case, the second segment voltage conditioning circuit <NUM> is conducted and operating, and the first segment voltage conditioning circuit <NUM> and the third segment voltage conditioning circuit <NUM> are open and are not operating. When VTH2 < VIN, the first switching tube Q1, the second switching tube Q2 and the fifth switching tube Q5 are closed, the third switching tube Q3 and the fifth switching tube Q4 are open. In this case, the third segment voltage conditioning circuit <NUM> is conducted and operating, and the first voltage conditioning sub-circuit <NUM> and the second voltage conditioning sub-circuit <NUM> are open and are not operating.

In detail, as shown in <FIG>, the first proportional operational amplifier sub-circuit <NUM> includes a first operational amplifier, a ninth resistor R9 (having a resistance value of r9), and a tenth resistor R10 (having a resistance value of r10). The second proportional operational amplifier sub-circuit <NUM> includes a second operational amplifier, an eleventh resistor R11 (having a resistance value of r11), and a twelfth resistor R12 (having a resistance value of r12). The third proportional operational amplifier sub-circuit <NUM> includes a third operational amplifier, a thirteenth resistor R13 (having a resistance value of r13), and a fourteenth resistor R14 (having a resistance value of r14). The first differential amplifier sub-circuit <NUM> includes a fourth operational amplifier, a fifteenth resistor R15 (having a resistance value of r15), a sixteenth resistor R16 (having a resistance value of r16), a seventeenth resistor R17 (having a resistance value of r17), and an eighteenth resistor R18 (having a resistance value of r18). The second differential amplifier sub-circuit <NUM> includes a fifth operational amplifier, a nineteenth resistor R19 (having a resistance value of r19), a twentieth resistor R20 (having a resistance value of r20), a twenty-first resistor R21 (having a resistance value of r21), and a twenty-second resistor R22 (having a resistance value of r22).

When VIN < VTH1, the third switching tube Q3 of the first voltage conditioning sub-circuit <NUM> is closed, and the first switching tube Q1 and the second switching tube Q2 are open. In this case, the first voltage conditioning sub-circuit <NUM> is conducted and operating, and the second voltage conditioning sub-circuit <NUM> and the third voltage conditioning sub-circuit <NUM> are disconnected and are not operating, such that the output voltage is: <MAT>. To be noted that, the output voltage may be biased and proportionally amplified based on demands.

When VTH1 < VIN < VTH2, the first switching tube Q1, the second switching tube Q2 and the fourth switching tube Q4 are closed, and the third switching tube Q3 and the fifth switching tube Q5 are open. In this case, the second segment voltage conditioning sub-circuit <NUM> is conducted and operating, the first segment voltage conditioning sub-circuit <NUM> and the third segment voltage conditioning sub-circuit <NUM> are disconnected and are not operating. When r15=r16=r17=r18, the output voltage is: <MAT>. In order to allow the voltage to be output continuously, the VTH3 voltage is set to be: <MAT>. Further, the output voltage is: <MAT>.

When VTH2 < VIN, the first switching tube Q1, the second switching tube Q2 and the fifth switching tube Q5 are all closed, the third switching tube Q3 and the fourth switching tube Q4 are all open. In this case, the third segment voltage conditioning sub-circuit <NUM> is conducted and operating, and the first segment voltage conditioning sub-circuit <NUM> and the second segment voltage conditioning sub-circuit <NUM> are disconnected and are not operating. When r19 = r20 = r21 = r22, <MAT>. In order to allow the voltage to be output continuously, the VTH4 voltage is set to be <MAT>, such that the output voltage is: <MAT>.

That is, the input votlage VIN is conditioned, and an output result of the conditioning is: <MAT>.

To be noted that a similar concept allows multi-segment (such as four segments, five segments, six segments, and so on) voltage continuous signal conditioning to be achieved.

In the above embodiments, the input voltage is divided in to a plurality of ranges, and the input voltage signal is compared and processed. When the voltage value of the input voltage signal falls into a certain input voltage range, a voltage conditioning sub-circuit corresponding to the certain range (the first voltage conditioning sub-circuit, the second voltage conditioning sub-circuit, and the third voltage conditioning sub-circuit) is conducted to achieve segmented selectable voltage signal conditioning. In the present disclosure, the voltage signal conditioning is optimized, the voltage is automatically segmented and conditioned. The circuit may be flexibly adapted for multi-segment voltage conditioning. The applicable sampling range of the voltage sampling conditioning is increased, and the sampling accuracy and universality is improved. Therefore, scenarios that voltage sampling and conditioning are increased, and universality and accuracy of the circuit are improved.

In an embodiment, a signal measurement device is provided. The signal measurement device includes a segmented selectable signal conditioning circuit as mentioned in any of the above embodiments.

Details of the segmented selectable signal conditioning circuit may refer to the description of the above embodiments, and will not be repeated here.

Technical features of the above embodiments may be combined in various ways. In order to provide a concise description, not all possible combinations of the technical features of the above embodiments are described. However, as long as a combination of technical features does not generate conflict, the combination shall be considered to be within the scope of the present disclosure.

Claim 1:
A signal conditioning circuit, comprising:
a segmented voltage threshold circuit (<NUM>), comprising X segmented voltage threshold sub-circuits, wherein the X segmented voltage threshold sub-circuits is configured to output X voltage threshold signals, and the X voltage threshold signals have different threshold values, and X is an integer greater than or equal to <NUM>;
a selection circuit (<NUM>), connected to the segmented voltage threshold circuit (<NUM>) and configured to receive an input voltage signal and the X voltage threshold signals and output X+<NUM> conduction signals, wherein each conduction signal of the X+<NUM> conduction signals is output based on a comparison result between the input voltage signal and one of the X voltage threshold signals; and
a segmented voltage conditioning circuit (<NUM>), comprising X+<NUM> segmented voltage conditioning sub-circuits, wherein each of the X+<NUM> segmented voltage conditioning sub-circuit is configured to condition the input voltage signal to output a corresponding output voltage signal based on a corresponding conduction signal of the X +<NUM> conduction signals;
wherein the segmented voltage conditioning circuit (<NUM>) comprises a switching transistor and a proportional operational amplifier sub-circuit, the proportional operational amplifier sub-circuit is configured to amplify the input voltage signal in a preset proportion, wherein a gate of the switching transistor is connected to the selection circuit, a source of the switching transistor is connected to an input terminal of the proportional operational amplifier sub-circuit, and an output terminal of the proportional operational amplifier sub-circuit is configured to output a proportional amplified voltage signal.