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CN-115694468-B - Signal conversion circuit

CN115694468BCN 115694468 BCN115694468 BCN 115694468BCN-115694468-B

Abstract

The invention provides a signal conversion circuit. The input end and the output end of the voltage adjusting circuit are respectively coupled with the power supply voltage and the output end of the signal converting circuit, the control circuit provides a control signal to the control end of the voltage adjusting circuit, and the control signal is controlled to be switched between a first control voltage level and a second control voltage level according to the input data signal, or whether a default voltage is provided to the output end of the voltage adjusting circuit is determined according to the input data signal so as to convert the input data signal into a data power supply signal.

Inventors

  • YAN ZHILIANG
  • KONG JIANMIN
  • XU PENG

Assignees

  • 中磊电子（苏州）有限公司
  • 中磊电子股份有限公司

Dates

Publication Date
20260505
Application Date
20221031

Claims (8)

  1. 1. A signal conversion circuit, comprising: The voltage adjusting circuit comprises a control end, an input end coupled to the power supply voltage, an output end coupled to the output end of the signal converting circuit, and The control circuit is coupled to the voltage adjustment circuit and provides a control signal to a control end of the voltage adjustment circuit, the control signal is controlled to switch between a first control voltage level and a second control voltage level corresponding to the signal level change of the input data signal according to an input data signal, or whether a default voltage is provided to an output end of the voltage adjustment circuit is determined according to the input data signal so as to convert the input data signal into a data power supply signal, and the control end of the voltage adjustment circuit is coupled to the power supply voltage so as to receive the control signal, and the control circuit comprises: a first switch circuit having a control terminal receiving the input data signal, and The second switch circuit is coupled between the power supply voltage and the output end of the voltage regulating circuit, the first switch circuit is coupled between the control end of the second switch circuit and the reference voltage, and the first switch circuit determines whether to connect the control end of the second switch circuit to the reference voltage according to the input data signal so as to correspondingly turn on or off the second switch circuit.
  2. 2. The signal conversion circuit of claim 1, wherein the first switching circuit comprises: And the transistor is coupled between the control end of the second switch circuit and the reference voltage, and the control end of the transistor receives the input data signal.
  3. 3. The signal conversion circuit according to claim 1, wherein the second switching circuit includes: And the transistor is coupled between the power supply voltage and the output end of the voltage regulating circuit, and the control end of the transistor is coupled with the first switching circuit.
  4. 4. The signal conversion circuit of claim 1, further comprising: The voltage dividing circuit is coupled to the power supply voltage, the control ends of the first switch circuit and the second switch circuit, and divides the power supply voltage when the first switch circuit is conducted to provide divided voltage to the control end of the second switch circuit.
  5. 5. The signal conversion circuit according to claim 4, wherein the voltage dividing circuit includes: a first resistor coupled between the power voltage and the control terminal of the second switch circuit, and The second resistor is coupled between the control end of the second switch circuit and the first switch circuit.
  6. 6. The signal conversion circuit of claim 1, further comprising: the voltage dividing circuit is coupled between the power supply voltage and the reference voltage, divides the power supply voltage, and provides a conducting voltage as the control signal to the control end of the voltage regulating circuit, wherein the conducting voltage controls the voltage regulating circuit to provide the power supply voltage.
  7. 7. The signal conversion circuit according to claim 6, wherein the voltage dividing circuit includes: a third resistor coupled between the power supply voltage and the control terminal of the voltage regulating circuit, and And the fourth resistor is coupled between the control end of the voltage regulating circuit and the reference voltage.
  8. 8. The signal conversion circuit of claim 1, further comprising: The cathode terminal and the anode terminal of the Zener diode are respectively coupled with the control terminal of the voltage regulating circuit and the reference voltage.

Description

Signal conversion circuit Technical Field The present invention relates to a signal conversion circuit, and more particularly to a signal conversion circuit integrating a data signal and a power signal. Background Generally, the data signal and the power signal are transmitted independently, and thus two lines are required to be transmitted separately. However, some products have limited size available to accommodate circuit wiring that cannot accommodate separate data signals and power signals, and thus the difficulty of wiring increases significantly. In addition, the increased difficulty in wiring often results in an unnecessarily long circuit wiring, and in the case of long-distance transmission, the signal is prone to problems of being disturbed or attenuated. In addition, the existing products often use multiple voltage levels to generate the data signals, and when the accommodating size of the products is limited, the circuit design of multiple voltage levels is not easy to be adopted, and in addition, the multiple voltage levels also cause more signal interference problems. Disclosure of Invention The invention provides a signal conversion circuit which can effectively reduce wiring difficulty and ensure signal transmission quality. The signal conversion circuit comprises a voltage adjusting circuit and a control circuit. The input end and the output end of the voltage adjusting circuit are respectively coupled with the power supply voltage and the output end of the signal converting circuit. The control circuit is coupled to the voltage adjusting circuit and provides a control signal to the control end of the voltage adjusting circuit body, and switches between a first control voltage level and a second control voltage level according to the signal level change of the input data signal corresponding to the control signal of the input data signal, or determines whether to provide a default voltage to the output end of the voltage adjusting circuit body according to the input data signal so as to convert the input data signal into a data power signal. Based on the above, the input end and the output end of the voltage adjusting circuit are respectively coupled to the power supply voltage and the output end of the signal converting circuit, the control circuit can provide a control signal to the control end of the voltage adjusting circuit, and switch between the first control voltage level and the second control voltage level according to the signal level change of the input data signal corresponding to the control signal of the input data signal, or determine whether to provide a default voltage to the output end of the voltage adjusting circuit according to the input data signal, so as to convert the input data signal into a data power supply signal. Therefore, the input data signal and the power supply voltage are integrated to generate the data power supply signal, and the purpose of transmitting the data signal and the power supply signal can be achieved simultaneously by only one transmission line, so that the wiring difficulty can be reduced, the data signal is ensured not to be interfered under the condition of long-distance transmission, and the signal transmission quality is greatly improved. In order to make the above features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below. Drawings FIG. 1 is a schematic diagram of an embodiment of a signal conversion circuit of the present invention; FIG. 2 is a schematic diagram of another embodiment of a signal conversion circuit of the present invention; FIG. 3 is a timing diagram illustrating an embodiment of the signal conversion circuit of FIG. 2; FIG. 4 is a schematic diagram of another embodiment of a signal conversion circuit of the present invention; FIG. 5 is a schematic diagram of another embodiment of a signal conversion circuit of the present invention; FIG. 6 is a timing diagram illustrating the operation of the signal conversion circuit of the embodiment of FIG. 5; fig. 7 is a schematic diagram of another embodiment of the signal conversion circuit of the present invention. Detailed Description Fig. 1 is a schematic diagram of an embodiment of a signal conversion circuit according to the present invention, please refer to fig. 1. The signal conversion circuit 100 includes a control circuit 102 and a voltage adjustment circuit 103, the voltage adjustment circuit 103 has a control terminal, an input terminal and an output terminal, in this embodiment, the voltage adjustment circuit 103 is implemented by a bipolar transistor Q1 (bipolar junction transistor, BJT), wherein the control terminal, the input terminal and the output terminal of the voltage adjustment circuit 103 are respectively the base, the collector and the emitter of the bipolar transistor Q1. The collector and emitter of the bipolar transistor Q1 are coupled TO the power voltage VCC and the output