A resistance-type splitting apparatus includes a transformer and a resistor distribution circuit. The resistor distribution circuit is electrically connected to the transformer. The resistor distribution circuit includes a plurality of distribution resistors. The distribution resistors are electrically connected to the transformer. The distribution resistors of the resistor distribution circuit are arranged as a radial pattern. The transformer receives a cable television signal. After the transformer receives the cable television signal, the transformer distributes the cable television signal through the distribution resistors. A transformer turns ratio of the transformer is adjusted to perform an impedance matching with the distribution resistors of the resistor distribution circuit.

BACKGROUND OF THE INVENTION

Field of the Invention

The present invention relates to a splitting apparatus, and especially relates to a resistance-type splitting apparatus.

Description of the Related Art

Currently, the cable television system is very popular. The cable television system transmits television programs and network signals to client sides through coaxial cables. The client sides can use multimedia over coax alliance (which is usually abbreviated as MoCA) apparatuses so that a plurality of rooms have the network signals to use at the same time.

The related art cable television system needs to use the splitter to distribute signals to the client sides. However, the related art splitter used in the cable television area is manufactured with the—ferrite core which is wound by wires. It has high energy loss and bad frequency response at high frequency (for example, above 1 GHz), which influence the quality of the signals. If the stages are more, the influence is more serious. Moreover, although the frequency response of the related art pure-resistance-type splitting circuit is better, it still has higher energy loss.

SUMMARY OF THE INVENTION

In order to solve the above-mentioned problems, an object of the present invention is to provide a resistance-type splitting apparatus.

In order to achieve the object of the present invention mentioned above, the resistance-type splitting apparatus of the present invention comprises a transformer and a resistor distribution circuit. The resistor distribution circuit is electrically connected to the transformer. Moreover, the resistor distribution circuit comprises a plurality of distribution resistors. The distribution resistors are electrically connected to the transformer. Moreover, the distribution resistors of the resistor distribution circuit are arranged as a radial pattern. The transformer is configured to receive a cable television signal. After the transformer receives the cable television signal, the transformer is configured to distribute the cable television signal through the distribution resistors. Moreover, a transformer turns ratio of the transformer is configured to be adjusted to be configured to perform an impedance matching with the distribution resistors of the resistor distribution circuit.

Moreover, in the resistance-type splitting apparatus mentioned above, the resistor distribution circuit further comprises a plurality of matched resistors. The matched resistors are electrically connected to the distribution resistors. Moreover, the transformer turns ratio of the transformer is configured to be adjusted to be configured to perform the impedance matching with the distribution resistors and the matched resistors of the resistor distribution circuit.

Moreover, in the resistance-type splitting apparatus mentioned above, resistance values of the distribution resistors are the same, so that the transformer is configured to equally (namely, evenly or averagely) distribute the cable television signal through the distribution resistors.

Moreover, in the resistance-type splitting apparatus mentioned above, resistance values of the matched resistors are the same, so that the transformer is configured to equally (namely, evenly or averagely) distribute the cable television signal through the distribution resistors.

Moreover, in the resistance-type splitting apparatus mentioned above, the resistance values of the distribution resistors are configured to be adjusted to be configured to adjust isolations between a plurality of output sides of the resistor distribution circuit.

Moreover, in the resistance-type splitting apparatus mentioned above, the resistance values of the distribution resistors and the resistance values of the matched resistors are configured to be adjusted to be configured to adjust the isolations between a plurality of the output sides of the resistor distribution circuit.

Moreover, in the resistance-type splitting apparatus mentioned above, the distribution resistors and the matched resistors of the resistor distribution circuit are arranged as the radial pattern, so that the transformer is configured to equally (namely, evenly or averagely) distribute the cable television signal through the distribution resistors.

Moreover, in the resistance-type splitting apparatus mentioned above, the resistor distribution circuit further comprises a plurality of the output sides. The output sides are electrically connected to the distribution resistors, the matched resistors and a plurality of user side apparatuses. Moreover, the distribution resistors and the matched resistors of the resistor distribution circuit are configured to impedance match with the user side apparatuses.

Moreover, in the resistance-type splitting apparatus mentioned above, the cable television signal is a multimedia over coax alliance signal.

The advantages of the present invention is to reduce the energy loss of the splitter used in the cable television area, and to improve the frequency response of the splitter used in the cable television area.

Please refer to the detailed descriptions and figures of the present invention mentioned below for further understanding the technology, method and effect of the present invention. The figures are only for references and descriptions, and the present invention is not limited by the figures.

DETAILED DESCRIPTION OF THE INVENTION

In the present disclosure, numerous specific details are provided, to provide a thorough understanding of embodiments of the invention. Persons of ordinary skill in the art will recognize, however, that the present invention can be practiced without one or more of the specific details. In other instances, well-known details are not shown or described to avoid obscuring aspects of the present invention. Please refer to following detailed description and figures for the technical content of the present invention:

FIG. 1shows a circuit block diagram of the first embodiment of the resistance-type splitting apparatus of the present invention. A resistance-type splitting apparatus10comprises a transformer106and a resistor distribution circuit108. The resistor distribution circuit108is electrically connected to the transformer106. The resistor distribution circuit108comprises a plurality of distribution resistors110, a plurality of output sides118and an input side126. The distribution resistors110are electrically connected to the transformer106. The output sides118are electrically connected to the distribution resistors110and a plurality of user side apparatuses102. The input side126is electrically connected to the distribution resistors110and the transformer106.

The transformer106receives a cable television signal112. After the transformer106receives the cable television signal112, the transformer106distributes the cable television signal112through the distribution resistors110to the user side apparatuses102. Moreover, the cable television signal112is, for examples but not limited to, a video signal, an audio signal, a data signal or a multimedia over coax alliance (which is usually abbreviated as MoCA) signal.

The distribution resistors110of the resistor distribution circuit108are arranged as a radial pattern, and resistance values of the distribution resistors110are the same (for example, 45 Ohms), so that the transformer106equally (namely, evenly or averagely) distributes the cable television signal112through the distribution resistors110to the user side apparatuses102.

In an embodiment, the resistance values of the distribution resistors110are adjusted to adjust isolations between the output sides118of the resistor distribution circuit108. A transformer turns ratio of the transformer106is adjusted to perform an impedance matching with the distribution resistors110of the resistor distribution circuit108. For example, if the resistance value of each of the distribution resistors110is 45 Ohms and a resistance value of each of the user side apparatuses102is 75 Ohms, then inFIG. 1, the calculation of the left side impedance of the transformer106is: (45+75)/4=30 Ohms.

FIG. 2shows a circuit block diagram of the second embodiment of the resistance-type splitting apparatus of the present invention. The descriptions of the elements shown inFIG. 2which are the same as the elements shown inFIG. 1are not repeated here for brevity. The resistor distribution circuit108further comprises a plurality of matched resistors116. The matched resistors116are electrically connected to the distribution resistors110, the output sides118and the user side apparatuses102.

The distribution resistors110and the matched resistors116of the resistor distribution circuit108are arranged as the radial pattern, and the resistance values of the distribution resistors110are the same (for example, 120 Ohms), and resistance values of the matched resistors116are the same (for example, 200 Ohms), so that the transformer106equally (namely, evenly or averagely) distributes the cable television signal112through the distribution resistors110to the user side apparatuses102.

In an embodiment, the resistance values of the distribution resistors110and the resistance values of the matched resistors116are adjusted to adjust the isolations between the output sides118of the resistor distribution circuit108. The transformer turns ratio of the transformer106is adjusted to perform the impedance matching with the distribution resistors110and the matched resistors116of the resistor distribution circuit108. The distribution resistors110and the matched resistors116of the resistor distribution circuit108impedance match with the user side apparatuses102.

FIG. 3shows a circuit block diagram of the third embodiment of the resistance-type splitting apparatus of the present invention. The descriptions of the elements shown inFIG. 3which are the same as the elements shown inFIG. 1andFIG. 2are not repeated here for brevity. The transformer106of the resistance-type splitting apparatus10is connected to a directional coupler114. The directional coupler114is connected to a cable television signal input side122and a cable television signal output side124.

If the working frequency is higher and the stages are more, using the resistance-type splitter can have better frequency response. If the resistance-type splitter is in an ideal matching, the loss of each of the resistor paths is the same. For example, the loss between the input and any output is equal to the loss between the outputs. In fact, the circuit designer will hope that the loss between the input and any output is smaller, and the loss between the outputs is larger (namely, isolation between the outputs is higher). At this time, the input resistor will be adjusted to be lower, and (or) the output resistor will be adjusted to be higher. When the resistors are adjusted to obtain desired loss, the return loss of the input and the return loss of the output are already very bad (namely, the impedance is not well matched).

In order to solve the problem mentioned above, the present invention further utilizes the transformer106to replace the input resistor. The wire wrapping ratio between the primary side and the secondary side of the transformer106is adjusted, so that the input impedance matches the output impedance. Although the transformer is usually also manufactured by wire wrapping, but it has only one stage, so the problem of uneven frequency response can be controlled and improved easily. Moreover, adjusting the output resistors and the transformer may not meet some designs, so the present invention further utilizes the matched resistors116to achieve better impedance matching.

The advantages of the present invention is to reduce the energy loss of the splitter used in the cable television area, and to improve the frequency response of the splitter used in the cable television area.