Communication signal transmission circuit and electronic equipment

Abstract

The present invention relates to a communication signal transmission circuit and electronic equipment, comprising: a first signal transceiver circuit including a first transmitting unit and a receiving unit, a second signal transceiver circuit including a second transmitting unit and a receiving unit, and first and second driving units and a power supply unit; the first driving unit is connected to the first transmitting unit and the second receiving unit, outputs a first driving level when the first transmitting unit outputs a high level, and outputs a second driving level when the first transmitting unit outputs a low level; the second driving unit is connected to the second transmitting unit and the first receiving unit, outputs a third driving level when the second transmitting unit outputs a high level, and outputs a fourth driving level when the second transmitting unit outputs a low level; the first driving unit outputs a first driving level when the first transmitting unit is on standby; the second driving unit outputs a third driving level when the second transmitting unit is on standby. The implementation of the present invention can improve communication isolation and reduce the influence of interference on the communication process.

Description

Technical Field

[0001] The present invention relates to the technical field of communication circuits, and more specifically, to a communication signal transmission circuit and electronic equipment. Background Art

[0002] At present, in various circuit boards, it is often necessary to communicate between different controllers or mainboards. At present, when two or more mainboards need to communicate, the common practice is to directly connect the controller of each mainboard, such as the MCU communication port, to the controller of other mainboards, such as the MCU communication port. This embodiment will cause poor interference resistance during communication, wherein interference is easily introduced in the transmission path to cause damage to the communication port. For example, static interference is introduced to damage the MCU communication port. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a communication signal transmission circuit and an electronic device in view of the above-mentioned technical defects of the prior art.

[0004] The technical solution adopted by the present invention to solve the technical problem is: construct a communication signal transmission circuit, including: a first signal transceiver circuit including a first transmitting unit and a first receiving unit, a second signal transceiver circuit including a second transmitting unit and a second receiving unit, and a first driving unit, a second driving unit and a power supply unit;

[0005] The first driving unit is connected to the first transmitting unit, the second receiving unit and the power supply unit, and is configured to output a first driving level when the first transmitting unit outputs a high level, and output a second driving level when the first transmitting unit outputs a low level;

[0006] The second driving unit is connected to the second transmitting unit, the first receiving unit and the power supply unit, and is configured to output a third driving level when the second transmitting unit outputs a high level, and output a fourth driving level when the second transmitting unit outputs a low level;

[0007] The first driving unit is further configured to continuously output the first driving level when the first transmitting unit is in a standby state;

[0008] The second driving unit is further configured to continuously output the third driving level when the second transmitting unit is in a standby state.

[0009] Preferably, the first driving unit includes a first switching unit and a first voltage output unit;

[0010] The first switch unit is connected to the first transmitting unit, and is configured to be turned on when the first transmitting unit outputs a high level, and to be turned off when the first transmitting unit outputs a low level; the first voltage output unit is connected to the first switch unit and the second receiving unit, and is configured to output the first driving level when the first switch unit is turned on, and to turn off the first driving level when the first switch unit is turned off.

[0011] Preferably, the first switching unit includes a third switching tube, a resistor R9 and a resistor R5; the first end of the third switching tube is connected to the first end of the resistor R9, the second end of the resistor R9 is connected to the first transmitting unit, the third end of the third switching tube is connected to the first end of the resistor R5, the second end of the resistor R5 is connected to the power supply unit, and the third end of the third switching tube is connected to the first voltage output unit.

[0012] Preferably, the first voltage output unit includes a fourth switch tube, a resistor R6 and a resistor R8, the first end of the fourth switch tube is connected to the second end of the third switch tube and the first end of the resistor R5, the second end of the fourth switch tube is grounded, the third end of the fourth switch tube is connected to the first end of the resistor R6 and the first end of the resistor R8, the second end of the resistor R6 is connected to the power supply unit, and the second end of the resistor R8 is connected to the second receiving unit.

[0013] Preferably, the third switch tube includes a first transistor Q3, the base of the first transistor Q3 is connected to the first end of the resistor R9, the emitter of the first transistor Q3 is grounded, and the collector of the first transistor Q3 is connected to the first end of the resistor R5; and / or

[0014] The fourth switch tube includes a second transistor Q4, the base of the second transistor Q4 is connected to the first end of the resistor R5, the emitter of the second transistor Q4 is grounded, and the collector of the second transistor Q4 is connected to the first end of the resistor R6 and the first end of the resistor R8.

[0015] Preferably, the first switch unit further includes a resistor R7, a first end of the resistor R7 is connected to the power supply unit, and a second end of the resistor R7 is connected to the second end of the resistor R9.

[0016] Preferably, the second driving unit includes a second switching unit and a second voltage output unit;

[0017] The second switch unit is connected to the second transmitting unit, and is configured to be turned on when the second transmitting unit outputs a high level, and to be turned off when the second transmitting unit outputs a low level;

[0018] The second voltage output unit is connected to the second switch unit and the first receiving unit, and is configured to output the third driving level when the second switch unit is turned on, and to turn off the third driving level when the second switch unit is turned off.

[0019] Preferably,

[0020] The second switch unit includes a sixth switch tube, a resistor R14 and a resistor R11; the first end of the sixth switch tube is connected to the first end of the resistor R14, the second end of the resistor R14 is connected to the second transmitting unit, the third end of the sixth switch tube is connected to the first end of the resistor R11, the second end of the resistor R11 is connected to the power supply unit, and the third end of the sixth switch tube is connected to the second voltage output unit.

[0021] Preferably, the second voltage output unit includes a fifth switch tube, a resistor R10 and a resistor R13, the first end of the fifth switch tube is connected to the second end of the sixth switch tube, the second end of the fifth switch tube is grounded, the third end of the fifth switch tube is connected to the first end of the resistor R10 and the first end of the resistor R13, the second end of the resistor R10 is connected to the power supply unit, and the second end of the resistor R13 is connected to the first receiving unit.

[0022] Preferably, the sixth switch tube includes a third triode Q6, the base of the third triode Q6 is connected to the first end of the resistor R14, the emitter of the third triode Q6 is grounded, and the collector of the third triode Q6 is connected to the first end of the resistor R11; and / or

[0023] The fifth switch tube includes a fourth transistor Q5, a base of the fourth transistor Q5 is connected to the first end of the resistor R11, an emitter of the fourth transistor Q5 is grounded, and a collector of the fourth transistor Q5 is connected to the first end of the resistor R13 and the first end of the resistor R10.

[0024] Preferably, the second switch unit further includes a resistor R12, a first end of the resistor R12 is connected to the power supply unit, and a second end of the resistor R12 is connected to the second end of the resistor R14.

[0025] Preferably, the first driving unit includes a first switching tube and a resistor R2; the first end of the first switching tube is connected to the first transmitting unit, the second end of the first switching tube is connected to the power supply unit, the third end of the first switching tube is connected to the first end of the resistor R2, and the second end of the resistor R2 is connected to the second receiving unit.

[0026] Preferably, the first driving unit further includes a resistor R1, a first end of the resistor R1 is connected to the power supply unit, and a second end of the resistor R1 is connected to a second end of the resistor R2.

[0027] Preferably, the first switch tube includes a first MOS tube Q1, a source of the first MOS tube Q1 is connected to the first emission unit, a gate of the first MOS tube Q1 is connected to the power supply unit, and a drain of the first MOS tube Q1 is connected to the first end of the resistor R2.

[0028] Preferably, the second driving unit includes a second switch tube and a resistor R4; the first end of the second switch tube is connected to the second transmitting unit, the second end of the second switch tube is connected to the power supply unit, the third end of the second switch tube is connected to the first end of the resistor R4, and the second end of the resistor R4 is connected to the first receiving unit.

[0029] Preferably, the second driving unit further includes a resistor R3, a first end of the resistor R3 is connected to the power supply unit, and a second end of the resistor R3 is connected to the second end of the resistor R4.

[0030] Preferably, the second switch tube includes a second MOS tube Q2, a source of the second MOS tube Q2 is connected to the second emission unit, a gate of the second MOS tube Q2 is connected to the power supply unit, and a drain of the second MOS tube Q2 is connected to the first end of the resistor R4.

[0031] In addition, the present invention also constructs an electronic device, including the communication signal transmission circuit as described in any one of the above.

[0032] A communication signal transmission circuit and electronic equipment implementing the present invention have the following beneficial effects: they can improve communication isolation and reduce the impact of interference on the communication process. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0034] Figure 1 It is a logic block diagram of an embodiment of a communication signal transmission circuit of the present invention;

[0035] Figure 2 is a logic block diagram of another embodiment of a communication signal transmission circuit of the present invention;

[0036] Figure 3 It is a circuit principle diagram of an embodiment of a communication signal transmission circuit of the present invention;

[0037] Figure 4 It is a circuit principle diagram of an embodiment of a communication signal transmission circuit of the present invention. DETAILED DESCRIPTION

[0038] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described in detail with reference to the accompanying drawings.

[0039] like Figure 1As shown, in a first embodiment of a communication signal transmission circuit of the present invention, it includes: a first signal transceiver circuit 110 including a first transmitting unit 111 and a first receiving unit 112, a second signal transceiver circuit 120 including a second transmitting unit 122 and a second receiving unit 121, and a first driving unit 131, a second driving unit 132 and a power supply unit; the first driving unit 131 is connected to the first transmitting unit 111, the second receiving unit 121 and the power supply unit, and is configured to output a first driving level when the first transmitting unit 111 outputs a high level, and output a first driving level when the first transmitting unit 111 outputs a high level. The first signal transceiver circuit 110 and the second signal receiving circuit 120 are connected to the second transmitting unit 122, the first receiving unit 112 and the power supply unit, and are configured to output a third driving level when the second transmitting unit 122 outputs a high level, and output a fourth driving level when the second transmitting unit 122 outputs a low level; the first driving unit 131 is also configured to continuously output the first driving level when the first transmitting unit 111 is in a standby state; the second driving unit 132 is also configured to continuously output the third driving level when the second transmitting unit 122 is in a standby state. Specifically, the first signal transceiver circuit 110 and the second signal receiving circuit can be set in different mainboards, controllers or circuits, and the first signal transceiver circuit 110 and the second signal transceiver circuit 120 are used to implement the signal transceiver process between different mainboards, controllers or circuits. The transmission link of the first signal transceiver circuit 110 includes a first driving unit 131, that is, the first transmitting unit 111 (also understood as a transmitting pin) in the first signal transceiver circuit 110 is connected to the second receiving unit 121 (also understood as a receiving pin) in the second transceiver circuit via the first driving unit 131. The first driving unit 131 is powered by the power supply unit. When the communication signal transmitted by the first transmitting unit 111 is at a high level, the first driving unit 131 outputs a first driving level corresponding to the high level. In one embodiment, the first driving level is also a high level, and the second receiving unit 121 receives the high level output by the first driving unit 131. When the communication signal transmitted by the first transmitting unit 111 is at a low level, the first driving unit 131 outputs a second driving level corresponding to the low level. In one embodiment, the second driving level is also a low level, and the second receiving unit 121 receives the low level output by the first driving unit 131. That is, the level signal received by the second receiving unit 121 through the first driving unit 131 corresponds one-to-one to the transmission level of the first transmitting unit 111. The second receiving unit 121 demodulates the received level signal to obtain the transmission signal of the first transmitting power supply, thereby realizing data communication between the first transmitting unit 111 and the second receiving unit 121.When the first transmitting unit 111 does not transmit a signal, that is, in the standby state, the first driving unit 131 continuously outputs the first driving level, for example, continuously outputs a high level, to ensure that the first driving unit 131 will not be triggered by mistake when there is external interference, causing the second receiving unit 121 to receive an erroneous signal, resulting in a communication transmission error. The transmission link of the second signal transceiver circuit 120 includes a second driving unit 132, that is, the second transmitting unit 122 (also understood as a transmitting pin) in the second signal transceiver circuit 120 is connected to the first receiving unit 112 (also understood as a receiving pin) in the first transceiver circuit via the second driving unit 132. The second driving unit 132 is powered by the power supply unit. When the communication signal transmitted by the second transmitting unit 122 is a high level, the second driving unit 132 outputs a third driving level corresponding to the high level. In one embodiment, the third driving level is also a high level, and at this time, the first receiving unit 112 receives the high level output by the second driving unit 132. When the communication signal transmitted by the second transmitting unit 122 is at a low level, the second driving unit 132 outputs a fourth driving level corresponding to the low level. In one embodiment, the fourth driving level is also at a low level, and at this time, the first receiving unit 112 receives the low level output by the second driving unit 132. That is, the level signal received by the first receiving unit 112 through the second driving unit 132 corresponds to the emission level of the second transmitting unit 122 one by one, and the first receiving unit 112 demodulates the received level signal to obtain the emission signal of the second transmitting power supply, thereby realizing data communication between the second transmitting unit 122 and the first receiving unit 112. When the second transmitting unit 122 does not transmit a signal, that is, in a standby state, the second driving unit 132 continuously outputs the third driving level, for example, continuously outputs a high level, to ensure that the second driving unit 132 will not be triggered by mistake when there is external interference, causing the first receiving unit 112 to receive an erroneous signal, resulting in a communication transmission error.

[0040] like Figure 2As shown, in one embodiment, the first driving unit 131 includes a first switch unit 1311 and a first voltage output unit 1312; the first switch unit 1311 is connected to the first transmitting unit 111, and is configured to be turned on when the first transmitting unit 111 outputs a high level, and to be turned off when the first transmitting unit 111 outputs a low level; the first voltage output unit 1312 is connected to the first switch unit 1311 and the second receiving unit 121, and is configured to output a first driving level when the first switch unit 1311 is turned on, and to turn off the first driving level when the first switch unit 1311 is turned off. Specifically, in the first driving unit 131, the first switch unit 1311 is connected to the first transmitting unit 111, and is driven to be turned on or off by the first transmitting unit 111. The first voltage output unit 1312 is used to provide a level output, which outputs the first driving level when the first switch unit 1311 is turned on, and turns off the first driving level when the first switch unit 1311 is turned off, that is, outputs the second driving level.

[0041] like Figure 3 As shown, in one embodiment, the first switch unit 1311 includes a third switch tube, a resistor R9 and a resistor R5; the first end of the third switch tube is connected to the first end of the resistor R9, the second end of the resistor R9 is connected to the first transmitting unit 111, the third end of the third switch tube is connected to the first end of the resistor R5, the second end of the resistor R5 is connected to the power supply unit, and the third end of the third switch tube is connected to the first voltage output unit 1312. Specifically, in the first switch unit 1311, the output level of the first transmitting unit 111 (corresponding to the TX1 pin) drives the third switch tube to turn on or off after passing through the resistor R9. When the third switch tube is turned on, the power supply unit is directly connected to the ground, and the first voltage output unit 1312 outputs the first driving level. Otherwise, the first voltage output power supply outputs the second driving level.

[0042] In one embodiment, the third switch tube includes a first transistor Q3, the base of the first transistor Q3 is connected to the first end of the resistor R9, the emitter of the first transistor Q3 is grounded, and the collector of the first transistor Q3 is connected to the first end of the resistor R5; that is, the transistor Q3 can be turned on or off.

[0043] In one embodiment, the first voltage output unit 1312 includes a fourth switch tube, a resistor R6 and a resistor R8, a first end of the fourth switch tube is connected to the second end of the third switch tube and the first end of the resistor R5, a second end of the fourth switch tube is grounded, a third end of the fourth switch tube is connected to the first end of the resistor R6 and the first end of the resistor R8, a second end of the resistor R6 is connected to the power supply unit, and a second end of the resistor R8 is connected to the second receiving unit 121. That is, the fourth switch tube can be driven on or off by the third switch tube. When the third switch tube is turned on, since the connection end between the third switch tube and the fourth switch tube outputs a low level, the fourth switch tube is turned off at this time, and the power supply voltage of the power supply unit is output to the second receiving unit 121 (corresponding to the RX2 pin) through the resistor R6 and the resistor R8, that is, the corresponding second receiving unit 121 receives the first driving level. When the third switch tube is turned off, the fourth switch is turned off at this time, and the power supply of the power supply unit is directly connected to the ground. At this time, the voltage of the resistor R8 is a low level, that is, the corresponding second receiving unit 121 receives the second driving level.

[0044] In one embodiment, the fourth switch tube includes a second triode Q4, the base of the second triode Q4 is connected to the first end of the resistor R5, the emitter of the second triode Q4 is grounded, and the collector of the second triode Q4 is connected to the first end of the resistor R6 and the first end of the resistor R8. That is, the power supply voltage can be turned on or off by the triode Q4.

[0045] In one embodiment, the first switch unit further includes a resistor R7, a first end of the resistor R7 is connected to the power supply unit, and a second end of the resistor R7 is connected to a second end of the resistor R9. The pull-up resistor R7 can be used to ensure that the first driving unit 131 continuously outputs a stable level when the first transmitting unit 111 is in standby mode, so as to prevent the second receiving unit 121 from receiving an erroneous communication signal.

[0046] In one embodiment, if Figure 2As shown, the second driving unit 132 includes a second switch unit 1321 and a second voltage output unit 1322; the second switch unit 1321 is connected to the second transmitting unit 122, and is configured to be turned on when the second transmitting unit 122 outputs a high level, and to be turned off when the second transmitting unit 122 outputs a low level; the second voltage output unit 1322 is connected to the second switch unit 1321 and the first receiving unit 112, and is configured to output the third driving level when the second switch unit 1321 is turned on, and to turn off the third driving level when the second switch unit 1321 is turned off. Specifically, in the second driving unit 132, the second switch unit 1321 is connected to the second transmitting unit 122 (corresponding to the TX2 pin), and is driven to be turned on or off by the second transmitting unit 122. The second voltage output unit 1322 is used to provide a level output, which outputs the third driving level when the second switch unit 1321 is turned on, and turns off the third driving level when the second switch unit 1321 is turned off, that is, outputs the fourth driving level.

[0047] In one embodiment, if Figure 3 As shown, the second switch unit includes a sixth switch tube, a resistor R14 and a resistor R11; a first end of the sixth switch tube is connected to a first end of the resistor R14, a second end of the resistor R14 is connected to the second transmitting unit 122, a third end of the sixth switch tube is connected to a first end of the resistor R11, a second end of the resistor R11 is connected to a power supply unit, and a third end of the sixth switch tube is connected to a second voltage output unit 1322. Specifically, in the second switch unit 1321, the output level of the second transmitting unit 122 drives the sixth switch tube to turn on or off after passing through the resistor R14. When the sixth switch tube is turned on, the power supply unit is directly connected to the ground, and the second voltage output unit 1322 outputs a third driving level. Otherwise, the second voltage output power supply outputs a fourth driving level.

[0048] Optionally, the sixth switch tube includes a third transistor Q6, the base of the third transistor Q6 is connected to the first end of the resistor R14, the emitter of the third transistor Q6 is grounded, and the collector of the third transistor Q6 is connected to the first end of the resistor R11; that is, conduction or shutdown can be achieved through the transistor Q6.

[0049] Optionally, the second voltage output unit 1322 includes a fifth switch tube, a resistor R10 and a resistor R13, the first end of the fifth switch tube is connected to the second end of the sixth switch tube, the second end of the fifth switch tube is grounded, the third end of the fifth switch tube is connected to the first end of the resistor R10 and the first end of the resistor R13, the second end of the resistor R10 is connected to the power supply unit, and the second end of the resistor R13 is connected to the first receiving unit 112. That is, the fifth switch tube can be driven to turn on or off by the sixth switch tube. When the sixth switch tube is turned on, since the connection end of the fifth switch tube and the sixth switch tube outputs a low level, the fifth switch tube is turned off at this time, and the power supply voltage of the power supply unit is output to the first receiving unit 112 (corresponding to the RX1 pin) through the resistor R10 and the resistor R13, that is, the first receiving unit 112 receives the third driving level. When the sixth switch tube is turned off, the fifth switch is turned off at this time, and the power supply of the power supply unit is directly grounded. At this time, the voltage of the resistor R13 is a low level, that is, the first receiving unit 112 receives the fourth driving level.

[0050] In one embodiment, the fifth switch includes a fourth transistor Q5, the base of the fourth transistor Q5 is connected to the first end of the resistor R11, the emitter of the fourth transistor Q5 is grounded, and the collector of the fourth transistor Q5 is connected to the first end of the resistor R13 and the first end of the resistor R10. That is, the transistor Q5 can be used to turn on or off the power supply voltage to the first receiving unit 112.

[0051] In one implementation, the second switch unit further includes a resistor R12, a first end of the resistor R12 is connected to the power supply unit, and a second end of the resistor R12 is connected to a second end of the resistor R14. The pull-up resistor R12 can be used to ensure that the second driving unit 132 continuously outputs a stable level when the second transmitting unit 122 is in standby mode, so as to prevent the first receiving unit 112 from receiving an erroneous communication signal.

[0052] like Figure 4 As shown, in one embodiment, the first driving unit 131 includes a first switch tube and a resistor R2; the first end of the first switch tube is connected to the first transmitting unit 111, the second end of the first switch tube is connected to the power supply unit, the third end of the first switch tube is connected to the first end of the resistor R2, and the second end of the resistor R2 is connected to the second receiving unit 121. Specifically, in the first driving unit 131, when the first transmitting unit 111 outputs a high level, the high level is output to the second receiving unit 121 through the body diode of the first switch tube and the resistor R2, that is, at this time, the second receiving unit 121 receives the corresponding first driving level. When the first transmitting unit 111 outputs a low level, the low level drives the first switch tube to turn on, and when the first switch tube is turned on, the resistor R2 is pulled down to a low level, and at this time, the corresponding second receiving unit 121 receives the second driving level.

[0053] Optionally, the first driving unit 131 further includes a resistor R1, a first end of the resistor R1 is connected to the power supply unit, and a second end of the resistor R1 is connected to a second end of the resistor R2. That is, the pull-up resistor R1 can be used to ensure that the first driving unit 131 continuously outputs a stable level when the first transmitting unit 111 is in standby mode, so as to prevent the second receiving unit 121 from receiving an erroneous communication signal.

[0054] Optionally, the first switch tube includes a first MOS tube Q1, a source of the first MOS tube Q1 is connected to the first emission unit 111, a gate of the first MOS tube Q1 is connected to the power supply unit, and a drain of the first MOS tube Q1 is connected to the first end of the resistor R2. Specifically, the first switch tube can be a MOS tube Q1, and it can also be a FET tube.

[0055] like Figure 4 As shown, in one embodiment, the second driving unit 132 includes a second switch tube and a resistor R4; the first end of the second switch tube is connected to the second transmitting unit 122, the second end of the second switch tube is connected to the power supply unit, the third end of the second switch tube is connected to the first end of the resistor R4, and the second end of the resistor R4 is connected to the first receiving unit 112. Specifically, in the second driving unit 132, when the second transmitting unit 122 outputs a high level, the high level is output to the first receiving unit 112 through the body diode of the second switch tube and the resistor R4, that is, at this time, the first receiving unit 112 receives the corresponding third driving level. When the second transmitting unit 122 outputs a low level, the low level drives the second switch tube to turn on, and when the second switch tube is turned on, the resistor R3 is pulled down to a low level, and at this time, the corresponding first receiving unit 112 receives the fourth driving level.

[0056] Optionally, the second driving unit 132 further includes a resistor R3, a first end of the resistor R3 is connected to the power supply unit, and a second end of the resistor R3 is connected to a second end of the resistor R4. That is, the pull-up resistor R3 can be used to ensure that the second driving unit 132 continuously outputs a stable level when the second transmitting unit 122 is in standby mode, so as to prevent the first receiving unit 112 from receiving an erroneous communication signal.

[0057] Optionally, the second switch tube includes a second MOS tube Q2, the source of the second MOS tube Q2 is connected to the second emission unit 122, the gate of the second MOS tube Q2 is connected to the power supply unit, and the drain of the second MOS tube Q2 is connected to the first end of the resistor R4. Specifically, the first switch tube can be a MOS tube Q1, which can also be a FET tube.

[0058] In addition, an electronic device of the present invention includes any one of the communication signal transmission circuits described above, that is, the communication signal transmission circuit can be arranged in the electronic device to realize signal transmission between different control components.

[0059] It can be understood that the above embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, the above technical features can be freely combined without departing from the concept of the present invention, and several deformations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should belong to the coverage of the claims of the present invention.

Claims

1. A communication signal transmission circuit, characterized in that: include: A first signal transceiver circuit including a first transmitting unit and a first receiving unit, a second signal transceiver circuit including a second transmitting unit and a second receiving unit, and a first driving unit, a second driving unit and a power supply unit; The first driving unit is connected to the first transmitting unit, the second receiving unit and the power supply unit, and is configured to output a first driving level when the first transmitting unit outputs a high level, and output a second driving level when the first transmitting unit outputs a low level; The second driving unit is connected to the second transmitting unit, the first receiving unit and the power supply unit, and is configured to output a third driving level when the second transmitting unit outputs a high level, and output a fourth driving level when the second transmitting unit outputs a low level; The first driving unit is further configured to continuously output the first driving level when the first transmitting unit is in a standby state; The second driving unit is further configured to continuously output the third driving level when the second transmitting unit is in a standby state; The first driving unit includes a first switching unit and a first voltage output unit; The first switch unit is connected to the first transmitting unit, and is configured to be turned on when the first transmitting unit outputs a high level, and to be turned off when the first transmitting unit outputs a low level; The first voltage output unit is connected to the first switch unit and the second receiving unit, and is configured to output the first driving level when the first switch unit is turned on, and to turn off the first driving level when the first switch unit is turned off; The second driving unit includes a second switching unit and a second voltage output unit; The second switch unit is connected to the second transmitting unit, and is configured to be turned on when the second transmitting unit outputs a high level, and to be turned off when the second transmitting unit outputs a low level; The second voltage output unit is connected to the second switch unit and the first receiving unit, and is configured to output the third driving level when the second switch unit is turned on, and to turn off the third driving level when the second switch unit is turned off.

2. The communication signal transmission circuit according to claim 1, characterized in that: The first switch unit includes a third switch tube, a resistor R9 and a resistor R5; the first end of the third switch tube is connected to the first end of the resistor R9, the second end of the resistor R9 is connected to the first transmitting unit, the third end of the third switch tube is connected to the first end of the resistor R5, the second end of the resistor R5 is connected to the power supply unit, and the third end of the third switch tube is connected to the first voltage output unit.

3. The communication signal transmission circuit according to claim 2, characterized in that: The first voltage output unit includes a fourth switch tube, a resistor R6 and a resistor R8, a first end of the fourth switch tube is connected to the second end of the third switch tube and the first end of the resistor R5, a second end of the fourth switch tube is grounded, a third end of the fourth switch tube is connected to the first end of the resistor R6 and the first end of the resistor R8, a second end of the resistor R6 is connected to the power supply unit, and a second end of the resistor R8 is connected to the second receiving unit.

4. The communication signal transmission circuit according to claim 3, characterized in that: The third switch tube comprises a first transistor Q3, the base of the first transistor Q3 is connected to the first end of the resistor R9, the emitter of the first transistor Q3 is grounded, and the collector of the first transistor Q3 is connected to the first end of the resistor R5; and / or The fourth switch tube includes a second transistor Q4, the base of the second transistor Q4 is connected to the first end of the resistor R5, the emitter of the second transistor Q4 is grounded, and the collector of the second transistor Q4 is connected to the first end of the resistor R6 and the first end of the resistor R8.

5. The communication signal transmission circuit according to claim 2, characterized in that: The first switch unit further includes a resistor R7, a first end of the resistor R7 is connected to the power supply unit, and a second end of the resistor R7 is connected to the second end of the resistor R9.

6. The communication signal transmission circuit according to claim 1, characterized in that: The second switch unit includes a sixth switch tube, a resistor R14 and a resistor R11; the first end of the sixth switch tube is connected to the first end of the resistor R14, the second end of the resistor R14 is connected to the second transmitting unit, the third end of the sixth switch tube is connected to the first end of the resistor R11, the second end of the resistor R11 is connected to the power supply unit, and the third end of the sixth switch tube is connected to the second voltage output unit.

7. The communication signal transmission circuit according to claim 6, characterized in that: The second voltage output unit includes a fifth switch tube, a resistor R10 and a resistor R13, the first end of the fifth switch tube is connected to the second end of the sixth switch tube, the second end of the fifth switch tube is grounded, the third end of the fifth switch tube is connected to the first end of the resistor R10 and the first end of the resistor R13, the second end of the resistor R10 is connected to the power supply unit, and the second end of the resistor R13 is connected to the first receiving unit.

8. The communication signal transmission circuit according to claim 7, characterized in that: The sixth switch tube includes a third transistor Q6, the base of the third transistor Q6 is connected to the first end of the resistor R14, the emitter of the third transistor Q6 is grounded, and the collector of the third transistor Q6 is connected to the first end of the resistor R11; and / or The fifth switch tube includes a fourth transistor Q5, a base of the fourth transistor Q5 is connected to the first end of the resistor R11, an emitter of the fourth transistor Q5 is grounded, and a collector of the fourth transistor Q5 is connected to the first end of the resistor R13 and the first end of the resistor R10.

9. The communication signal transmission circuit according to claim 6, characterized in that: The second switch unit further includes a resistor R12 , a first end of the resistor R12 is connected to the power supply unit, and a second end of the resistor R12 is connected to a second end of the resistor R14 .

10. A communication signal transmission circuit, characterized in that: The device comprises: a first signal transceiver circuit including a first transmitting unit and a first receiving unit, a second signal transceiver circuit including a second transmitting unit and a second receiving unit, a first driving unit, a second driving unit and a power supply unit; The first driving unit is connected to the first transmitting unit, the second receiving unit and the power supply unit, and is configured to output a first driving level when the first transmitting unit outputs a high level, and output a second driving level when the first transmitting unit outputs a low level; The second driving unit is connected to the second transmitting unit, the first receiving unit and the power supply unit, and is configured to output a third driving level when the second transmitting unit outputs a high level, and output a fourth driving level when the second transmitting unit outputs a low level; The first driving unit is further configured to continuously output the first driving level when the first transmitting unit is in a standby state; The second driving unit is further configured to continuously output the third driving level when the second transmitting unit is in a standby state; The first driving unit includes a first switch tube and a resistor R2; a first end of the first switch tube is connected to the first transmitting unit, a second end of the first switch tube is connected to the power supply unit, a third end of the first switch tube is connected to the first end of the resistor R2, and a second end of the resistor R2 is connected to the second receiving unit; The second driving unit includes a second switch tube and a resistor R4; the first end of the second switch tube is connected to the second transmitting unit, the second end of the second switch tube is connected to the power supply unit, the third end of the second switch tube is connected to the first end of the resistor R4, and the second end of the resistor R4 is connected to the first receiving unit.

11. The communication signal transmission circuit according to claim 10, characterized in that: The first driving unit further includes a resistor R1 , a first end of the resistor R1 is connected to the power supply unit, and a second end of the resistor R1 is connected to a second end of the resistor R2 .

12. The communication signal transmission circuit according to claim 10, characterized in that: The first switch tube includes a first MOS tube Q1, a source of the first MOS tube Q1 is connected to the first emission unit, a gate of the first MOS tube Q1 is connected to the power supply unit, and a drain of the first MOS tube Q1 is connected to the first end of the resistor R2.

13. The communication signal transmission circuit according to claim 10, characterized in that: The second driving unit further includes a resistor R3 , a first end of the resistor R3 is connected to the power supply unit, and a second end of the resistor R3 is connected to the second end of the resistor R4 .

14. The communication signal transmission circuit according to claim 10, characterized in that: The second switch tube includes a second MOS tube Q2, a source of the second MOS tube Q2 is connected to the second emission unit, a gate of the second MOS tube Q2 is connected to the power supply unit, and a drain of the second MOS tube Q2 is connected to the first end of the resistor R4.

15. An electronic device, characterized in that: Comprising the communication signal transmission circuit as described in any one of claims 1 to 14.

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