Please select the most similar patent number from A, B, C and D. Which number is?
The present invention relates to a battery management circuit, comprising a signal extraction unit, a clock capture unit, a voltage-controlled oscillator, and a voltage sampling unit. The signal extraction unit is suitable for extracting a synchronous pulse signal from a communication bus connected to the battery management circuit. The clock capture unit is connected to the signal extraction unit, and is suitable for generating a clock signal according to the synchronous pulse signal. The voltage-controlled oscillator is suitable for transforming a battery unit voltage into a voltage frequency signal. The voltage sampling unit is suitable for sampling the voltage frequency signal according to the clock signal to obtain a sampling voltage of the battery unit voltage.
A: A battery management system awakening method and an awakening system (100). The method comprises: converting, by means of a conversion unit (130), a low-voltage power supply signal detected by a low-voltage input port (120) into a high-voltage awakening signal, wherein a high-voltage control module (140) receives, under control of the high-voltage awakening signal, an operation voltage provided by a power battery pack (110); controlling, by means of the high-voltage control module (140), a high-voltage transmission module (150) to turn on, providing, via the high-voltage transmission module (150) that is turned on, the operation voltage to a synchronization rectification module (160), so as to convert a high-voltage electric energy provided by the power battery pack (110) into a low-voltage electric energy; and transmitting, under control of the synchronization rectification module (160), the low-voltage electric energy to a low-voltage controller (170), and awakening, by means of the low-voltage controller (170), a battery management system. The awakening method enables stable power supply of a low-voltage side from the high-voltage battery pack (110), thereby reducing degradation of a lead acid battery caused by the entire vehicle.
B: Provided are a shift register unit and gate driving circuit for suppressing an output error caused by a threshold voltage drift and an interval existing when pulling an output terminal down, improving the stability of a shift register unit. The shift register unit comprises an input module, a first output module, a pull-down drive module, a pull-down module, and a first output discharge module, the pull-down drive module being connected to a first clock signal input terminal and a second clock signal input terminal, and providing the first clock signal to a first pull-down node in response to a first clock signal, providing the second clock signal to a second pull-down node in response to a second clock signal; providing a first low-voltage signal to the first pull-down node and the second pull-down node in response to the voltage signal of a pull-up node; providing the first low-voltage signal to the second pull-down node in response to the voltage signal of the first pull-down node; and providing the first low-voltage signal to the first pull-down node in response to the voltage signal of the second pull-down node.
C: An RRAM voltage generation system comprises a charge pump (12), a square-wave oscillator (13), a linear voltage regulator (14), a power-on control circuit (15), and a voltage and current reference source (11). The charge pump (12) is used for raising a voltage of an external power source and providing a power source to another sub-circuit. The square-wave oscillator (13) is used for providing a clock signal, and an output end of the square-wave oscillator (13) is connected to a clock signal input end of the charge pump (12). The linear voltage regulator (14) is used for providing a driving voltage for the operation of a storage unit, and an output end of the linear voltage regulator (14) is sequentially connected to a row and column decoder (2) and a storage unit array (3). The linear voltage regulator (14) is also connected to an external power source VCC and a charge pump (12) output power source VPP. The power-on control circuit (15) is used for providing a power-on reset signal to a system, and also controlling the sequential start of the charge pump (12), the square-wave oscillator (13) and the linear voltage regulator (14). The voltage and current reference source (11) is used for providing a reference voltage and a reference current to the charge pump (12), the square-wave oscillator (13), the linear voltage regulator (14) and the power-on control circuit (15). Both an external power source and the charge pump (12) of a double-branch structure with good technological compatibility are used to separately supply power to the linear voltage regulator (14), and multiple bytes are supported.
D: Provided are a display device and a control method therefor. The display device comprises a source module and an array module. The source module comprises: a receive unit, for receiving an image signal and extracting a control signal and a pixel signal from the image signal; a clock signal generating unit for generating a plurality of clock signals, wherein all the clock signals have a same cycle and high level periods of the plurality of clock signals do not coincide with each other; a level boost unit, for boosting the voltage of the extracted control signal and pixel signal to an analog working voltage; and a digital-to-analog conversion unit, for converting the voltage of the boosted pixel signal into a grayscale voltage. The array module comprises a shift register for outputting the pixel signal with the grayscale voltage on the basis of the boosted control signal and the plurality of generated clock signals.
Answer: A