CN102832899B - Intelligent terminal resistance device - Google Patents

Abstract

An intelligent terminal resistor device comprises an input end switch, an input end terminal resistor, an output end switch and an output end terminal resistor. When a plurality of the intelligent terminal resistance devices are connected together, the input end switch of the first intelligent terminal resistance device is conducted so that the input end terminal resistance can be connected, and the output end switch is not conducted so that the output end terminal resistance can not be connected; the input end switch of the last intelligent terminal resistor device is not conducted so that the input end terminal resistor is not connected, and the output end switch is conducted so that the output end terminal resistor is connected; the input switches of the other intelligent terminal resistor devices are not conducted so that the input terminal resistors are not connected, and the output switches are not conducted so that the output terminal resistors are not connected.

Description

Intelligent terminal resistance device

technical field

The invention relates to a terminal resistance device, in particular to an intelligent terminal resistance device.

Background technique

RS485 is a common communication standard in industrial environments; controller area network (CAN or CAN-bus) is a common communication standard in vehicles. When using RS485 or controller area network, the first electronic device in the network needs to install a terminal resistor to reduce signal interference, and the last electronic device in the network also needs to install a terminal resistor to reduce signal interference.

Please refer to FIG. 1 , which is a block diagram of an existing RS485 (or controller area network) network connection. An electronic device 102 includes a communication integrated circuit 104 ; the communication integrated circuit 104 includes a high potential terminal 106 and a low potential terminal 108 for communicating with other electronic devices 102 . The high potential terminals 106 are connected together; the low potential terminals 108 are connected together. The first electronic device 102 needs to install a terminal resistor 110 to reduce signal interference, and the last electronic device 102 also needs to install a terminal resistor 110 to reduce signal interference.

At present, the existing method is that after the user finds the first electronic device 102 and the last electronic device 102, the user manually installs the terminal resistor 110 and the last electronic device on the first electronic device 102. 102 manually install the terminal resistor 110; this is very inconvenient and error-prone.

Contents of the invention

In order to improve the above-mentioned shortcomings of the prior art, the object of the present invention is to provide an intelligent termination resistor device.

In order to achieve the above object of the present invention, the intelligent terminal resistance device of the present invention is applied to a driving voltage and an electronic device, the electronic device includes a communication integrated circuit, the communication integrated circuit includes a high potential end and a low potential end, the The intelligent terminal resistance device includes: an input switch unit, including a first pin, a second pin and a third pin, and the third pin of the input switch unit is electrically connected to the low potential end ; an input terminal resistance unit, one end is electrically connected to the high potential end, and the other end is electrically connected to the first pin of the input switch unit; an input drive circuit unit is electrically connected to the driving voltage and the second pin of the input-end switch unit, the input-end drive circuit unit includes an input-end first resistance unit, one end is electrically connected to the driving voltage, and the other end is electrically connected to the input-end switch unit The second pin; an input short-circuit circuit, which is set relative to the input drive circuit unit; an output switch unit, including a first pin, a second pin and a third pin, the output switch unit The third pin of the output end is electrically connected to the low potential end; one end of an output terminal resistance unit is electrically connected to the high potential end, and the other end is electrically connected to the first pin of the output end switch unit; An output end drive circuit unit electrically connected to the drive voltage and the second pin of the output end switch unit, the output end drive circuit unit includes an output end first resistance unit, one end electrically connected to the drive voltage , the other end is electrically connected to the second pin of the output switch unit; and an output short-circuit circuit is set opposite to the output drive circuit unit. When the two smart terminal resistor devices are electrically connected, the input switch unit of the first smart terminal resistor device will be turned on, so the high potential end and the low potential end will be connected to the first smart terminal resistor The input terminal resistance unit of the device, the short-circuit circuit of the input terminal of the second intelligent terminal resistance device will ground the second pin of the output switch unit of the first intelligent terminal resistance device, thereby closing The output terminal switch unit of the first intelligent terminal resistance device, so the high potential end and the low potential end will not be connected to the output terminal resistance unit of the first intelligent terminal resistance device, the first intelligent terminal The short-circuit loop at the output end of the resistor device will ground the second pin of the input switch unit of the second smart terminal resistor device, thereby closing the input switch unit of the second smart terminal resistor device, Therefore, the high potential end and the low potential end will not be connected to the input terminal resistance unit of the second intelligent terminal resistance device, and the output switch unit of the second intelligent terminal resistance device will be turned on, so the high The potential terminal and the low potential terminal are connected to the output terminal resistance unit of the second intelligent terminal resistance device.

In order to achieve the above object of the present invention, the intelligent terminal resistance device of the present invention is applied to a driving voltage and an electronic device, the electronic device includes a communication integrated circuit, the communication integrated circuit includes a high potential end and a low potential end, the The intelligent terminal resistance device includes: an input switch unit, including a first pin, a second pin and a third pin, and the third pin of the input switch unit is electrically connected to the low potential end ; an input terminal resistance unit, one end is electrically connected to the high potential end, and the other end is electrically connected to the first pin of the input switch unit; an input drive circuit unit is electrically connected to the driving voltage and the second pin of the input-end switch unit, the input-end drive circuit unit includes an input-end first resistance unit, one end is electrically connected to the driving voltage, and the other end is electrically connected to the input-end switch unit The second pin; the first pin of an input end is electrically connected to the high potential end; the second pin of an input end is electrically connected to the low potential end; the third pin of an input end is opposite to the input The second pin of the input end is set; the fourth pin of the input end is electrically connected to the third pin of the input end; the fifth pin of the input end is electrically connected to the second pin of the switch unit of the input end ; a sixth pin of the input terminal, electrically connected to the ground; an output switch unit, including a first pin, a second pin and a third pin, the third pin of the output switch unit The pin is electrically connected to the low potential end; an output end terminal resistance unit, one end is electrically connected to the high potential end, and the other end is electrically connected to the first pin of the output end switch unit; an output end drive circuit The unit is electrically connected to the driving voltage and the second pin of the output switch unit. The output driving circuit unit includes an output first resistance unit, one end is electrically connected to the driving voltage, and the other end is electrically connected to the driving voltage. connected to the second pin of the switch unit at the output end; a first pin of the output end electrically connected to the high potential end; a second pin of the output end electrically connected to the low potential end; an output The third pin of the output end is electrically connected to the second pin of the switch unit of the output end; the fourth pin of the output end is electrically connected to the ground; the fifth pin of the output end is opposite to the fourth pin of the output end pin setting; and a sixth pin of an output end, electrically connected to the fifth pin of the output end.

The effect of the present invention is to enable the terminal resistor to be connected conveniently and correctly. The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

Description of drawings

Fig. 1 is existing RS485 (or controller area network) network connection block diagram;

Fig. 2 is a block diagram of an embodiment of the intelligent terminal resistance device of the present invention;

Fig. 3 is an application block diagram of an embodiment of the intelligent terminal resistance device of the present invention;

Fig. 4 is the block diagram of another embodiment of the intelligent terminal resistance device of the present invention;

Fig. 5 is an application block diagram of another embodiment of the intelligent terminal resistance device of the present invention.

FIG. 6 is a circuit diagram of an embodiment of the intelligent terminal resistance device of the present invention.

Among them, reference signs

Electronics 102

Communication Integrated Circuits 104

High potential terminal 106

Low potential terminal 108

Terminal resistance 110

Intelligent terminal resistance device 20

Driving voltage 30

The first pin 202 of the input terminal

The second pin 204 of the input terminal

The third pin 206 of the input terminal

The fourth pin 208 of the input terminal

The fifth pin 210 of the input terminal

The sixth pin 212 of the input terminal

Input switch unit 214

The first pin 216

Second pin 218

The third pin 220

Input terminal resistance unit 222

The first resistance unit 224 at the input end

The second resistance unit 226 at the input end

The first pin 228 of the output terminal

The second pin 230 of the output terminal

The third pin 232 of the output terminal

The fourth pin 234 of the output terminal

The fifth pin 236 of the output terminal

The sixth pin 238 of the output terminal

output switching unit 240

The first pin 242

Second pin 244

The third pin 246

Output end terminal resistance unit 248

The first resistance unit 250 at the output end

The second resistance unit 252 at the output end

Input short circuit 254

Output short circuit 256

Input drive circuit unit 258

Output drive circuit unit 260

Detailed ways

Below in conjunction with accompanying drawing, structural principle and working principle of the present invention are specifically described:

Please refer to FIG. 2 , which is a block diagram of an embodiment of the smart terminal resistance device of the present invention. The intelligent terminal resistance device 20 of the present invention is applied to a drive voltage 30 and an electronic device (not shown); the electronic device includes a communication integrated circuit (not shown); the communication integrated circuit includes a high potential terminal 106 and a low potential Terminal 108 for communicating with other electronic devices via RS485 or controller area network.

The intelligent terminal resistance device 20 comprises an input terminal switch unit 214, an input terminal resistance unit 222, an input drive circuit unit 258, an input short circuit 254, an output switch unit 240, an output terminal resistance unit 248 . An output drive circuit unit 260 and an output short circuit 256 .

The input switch unit 214 includes a first pin 216, a second pin 218 and a third pin 220; the output switch unit 240 includes a first pin 242, a second pin 244 and a The third pin 246 .

The input drive circuit unit 258 includes an input first resistance unit 224 and an input second resistance unit 226; the output drive circuit unit 260 includes an output first resistance unit 250 and an output second resistance unit 252.

The third pin 220 of the input switch unit 214 is electrically connected to the low potential end 108; one end of the input terminal resistance unit 222 is electrically connected to the high potential end 106; The other end is electrically connected to the first pin 216 of the input switch unit 214 .

The input drive circuit unit 258 is electrically connected to the drive voltage 30 and the second pin 218 of the input switch unit 214; one end of the input first resistance unit 224 is electrically connected to the drive voltage 30; The other end of the first resistance unit 224 at the input end is electrically connected to the second pin 218 of the switch unit 214 at the input end; one end of the second resistance unit 226 at the input end is electrically connected to the switch unit 214 at the input end. The second pin 218 ; the other end of the second resistor unit 226 at the input end is electrically connected to the ground; the short-circuit circuit 254 at the input end is set relative to the drive circuit unit 258 at the input end.

The third pin 246 of the output switch unit 240 is electrically connected to the low potential end 108; one end of the output terminal resistance unit 248 is electrically connected to the high potential end 106; The other end is electrically connected to the first pin 242 of the output switch unit 240 .

The output driving circuit unit 260 is electrically connected to the driving voltage 30 and the second pin 244 of the output switching unit 240; one end of the output first resistance unit 250 is electrically connected to the driving voltage 30; The other end of the output first resistor unit 250 is electrically connected to the second pin 244 of the output switch unit 240; one end of the output second resistor unit 252 is electrically connected to the output switch unit 240 The second pin 244 ; the other end of the second resistor unit 252 at the output end is electrically connected to the ground; the output short-circuit circuit 256 is set relative to the output end driving circuit unit 260 .

The input switch unit 214 can be a transistor switch or a field effect transistor; the output switch unit 240 can be a transistor switch or a field effect transistor; the input terminal resistor unit 222, the output terminal resistor unit 248, The input first resistor unit 224 , the output first resistor unit 250 , the input second resistor unit 226 and the output second resistor unit 252 are resistors.

Please refer to FIG. 3 , which is an application block diagram of an embodiment of the smart terminal resistance device of the present invention. When the two smart terminal resistance devices 20 are electrically connected:

The input terminal switch unit 214 of the first intelligent terminal resistance device 20 will be turned on, so the high potential terminal 106 and the low potential terminal 108 will be connected to the input terminal resistance unit of the first intelligent terminal resistance device 20 222.

The input terminal short circuit 254 of the second intelligent terminal resistance device 20 will ground the second pin 244 of the output switch unit 240 of the first intelligent terminal resistance device 20, thereby closing the first one of the intelligent terminal resistance device 20. The output terminal switch unit 240 of the smart terminal resistor device 20 , so the high potential terminal 106 and the low potential terminal 108 are not connected to the output terminal resistor unit 248 of the first intelligent terminal resistor device 20 .

The output terminal short circuit 256 of the first intelligent terminal resistance device 20 will ground the second pin 218 of the input switch unit 214 of the second intelligent terminal resistance device 20, thereby turning off the second terminal resistance device 20. The input terminal switch unit 214 of the smart terminal resistor device 20 , so the high potential terminal 106 and the low potential terminal 108 are not connected to the input terminal resistor unit 222 of the second intelligent terminal resistor device 20 .

The output terminal switch unit 240 of the second intelligent terminal resistance device 20 will be turned on, so the high potential terminal 106 and the low potential terminal 108 will be connected to the output terminal resistance unit of the second intelligent terminal resistance device 20 248.

Please refer to FIG. 4 , which is a block diagram of another embodiment of the smart terminal resistance device of the present invention. The intelligent terminal resistance device 20 of the present invention is applied to a drive voltage 30 and an electronic device (not shown); the electronic device includes a communication integrated circuit (not shown); the communication integrated circuit includes a high potential terminal 106 and a low potential Terminal 108 for communicating with other electronic devices via RS485 or controller area network.

The intelligent terminal resistance device 20 includes an input terminal switch unit 214, an input terminal resistance unit 222, an input drive circuit unit 258, an input first pin 202, an input second pin 204, an input A third pin 206 of an input end, a fourth pin 208 of an input end, a fifth pin 210 of an input end, and a sixth pin 212 of an input end.

The intelligent terminal resistor device 20 also includes an output switch unit 240, an output terminal resistor unit 248, an output drive circuit unit 260, an output first pin 228, an output second pin 230, a The third pin 232 of the output end, the fourth pin 234 of the output end, the fifth pin 236 of the output end, and the sixth pin 238 of the output end.

The input switch unit 214 includes a first pin 216, a second pin 218 and a third pin 220; the output switch unit 240 includes a first pin 242, a second pin 244 and a The third pin 246 .

The input drive circuit unit 258 includes an input first resistance unit 224 and an input second resistance unit 226; the output drive circuit unit 260 includes an output first resistance unit 250 and an output second resistance unit 252. The third pin 220 of the input switch unit 214 is electrically connected to the low potential end 108; one end of the input terminal resistance unit 222 is electrically connected to the high potential end 106; The other end is electrically connected to the first pin 216 of the input switch unit 214 .

The input drive circuit unit 258 is electrically connected to the drive voltage 30 and the second pin 218 of the input switch unit 214; one end of the input first resistance unit 224 is electrically connected to the drive voltage 30; The other end of the first resistance unit 224 at the input end is electrically connected to the second pin 218 of the switch unit 214 at the input end; one end of the second resistance unit 226 at the input end is electrically connected to the switch unit 214 at the input end. The second pin 218 ; the other end of the second resistor unit 226 at the input end is electrically connected to the ground.

The first pin 202 of the input end is electrically connected to the high potential end 106; the second pin 204 of the input end is electrically connected to the low potential end 108; the third pin 206 of the input end is second to the input end The pin 204 is set; the fourth pin 208 of the input end is electrically connected to the third pin 206 of the input end; the fifth pin 210 of the input end is electrically connected to the second pin of the switch unit 214 of the input end 218 ; the sixth pin 212 of the input end is electrically connected to the ground.

The third pin 246 of the output switch unit 240 is electrically connected to the low potential end 108; one end of the output terminal resistance unit 248 is electrically connected to the high potential end 106; The other end is electrically connected to the first pin 242 of the output switch unit 240 .

The output driving circuit unit 260 is electrically connected to the driving voltage 30 and the second pin 244 of the output switching unit 240; one end of the output first resistance unit 250 is electrically connected to the driving voltage 30; The other end of the output first resistor unit 250 is electrically connected to the second pin 244 of the output switch unit 240; one end of the output second resistor unit 252 is electrically connected to the output switch unit 240 The second pin 244 ; the other end of the second resistor unit 252 at the output end is electrically connected to the ground.

The first pin 228 of the output end is electrically connected to the high potential end 106; the second pin 230 of the output end is electrically connected to the low potential end 108; the third pin 232 of the output end is electrically connected to the output The second pin 244 of the end switch unit 240; the fourth pin 234 of the output end is electrically connected to the ground; the fifth pin 236 of the output end is set opposite to the fourth pin 234 of the output end; the sixth pin of the output end The pin 238 is electrically connected to the fifth pin 236 of the output end.

The input switch unit 214 can be a transistor switch or a field effect transistor; the output switch unit 240 can be a transistor switch or a field effect transistor; the input terminal resistor unit 222, the output terminal resistor unit 248, The input first resistor unit 224 , the output first resistor unit 250 , the input second resistor unit 226 and the output second resistor unit 252 are resistors.

Please refer to FIG. 5 , which is an application block diagram of another embodiment of the smart terminal resistance device of the present invention; assuming that three electronic devices need to be connected and communicated. The first pin 228 to the sixth pin 238 of the output end of the first smart terminal resistor device 20 from left to right are electrically connected to the second smart terminal resistor device 20 from left to right in sequence. The first pin 202 of the input end to the sixth pin 212 of the input end; the first pin 228 of the output end of the second smart terminal resistance device 20 from left to right to the sixth pin 238 of the output end It is electrically connected to the first pin 202 of the input end to the sixth pin 212 of the input end of the third smart terminal resistance device 20 from left to right in sequence.

The input end switch unit 214 of the first smart terminal resistance device 20 from left to right is turned on, so the input end is connected between the first pin 202 of the input end and the second pin 204 of the input end. Terminal resistor unit 222; the output switch unit 240 of the first intelligent terminal resistor device 20 from left to right will not conduct because the second pin 244 of the output switch unit 240 is grounded, so the output terminal The output end termination resistor unit 248 is not connected between the first pin 228 and the second output end pin 230 . That is, the first electronic device will have a terminating resistor.

The input end switch unit 214 of the second smart terminal resistance device 20 from left to right will be non-conductive because the second pin 218 of the input end switch unit 214 is grounded, so the first input end pin 202 The input terminal resistance unit 222 will not be connected between the second pin 204 of the input terminal; the output switch unit 240 of the second intelligent terminal resistance device 20 from left to right will be The second pin 244 of 240 is grounded and non-conductive, so the output terminal resistor unit 248 is not connected between the first output pin 228 and the second output pin 230 . That is to say, the electronic devices in the middle do not have a terminal resistor.

The input end switch unit 214 of the third smart terminal resistance device 20 from left to right will be non-conductive because the second pin 218 of the input end switch unit 214 is grounded, so the first input end pin 202 The input terminal resistance unit 222 will not be connected between the second pin 204 of the input terminal; the output switch unit 240 of the third intelligent terminal resistance device 20 from left to right will be turned on, so the output The output terminal resistor unit 248 is connected between the first pin 228 of the output terminal and the second pin 230 of the output terminal. That is, the last electronic device will have a termination resistor.

In a specific embodiment, the first pin 202 of the input terminal to the sixth pin 212 of the input terminal can be realized by an RJ45 female connector (RJ45 has eight pins, so two pins will not be used); the The first pin 228 of the output end to the sixth pin 238 of the output end can also be implemented with an RJ45 female connector; therefore, the electrical connection of the smart terminal resistance devices 20 can be implemented with an RJ45 network cable.

Please refer to FIG. 6 , which is a circuit diagram of an embodiment of the smart termination resistor device of the present invention. In this embodiment, an RJ45 female connector is used to realize the first pin 202 of the input terminal to the sixth pin 212 of the input terminal (wherein the first pin and the sixth pin of the RJ45 female connector are not used); the implementation An example is to use an RJ45 female connector to realize the first pin 228 to the sixth pin 238 of the output end (wherein the first pin and the sixth pin of the RJ45 female connector are not used).

The advantage of the intelligent terminal resistance device of the present invention is that after multiple electronic devices are connected, a terminal resistance is automatically connected to the first electronic device and a terminal resistance is connected to the last electronic device, while the rest The electronic device is automatically not connected to a terminal resistor to correctly reduce signal interference; it is not like the prior art that requires the user to find the first and last electronic device, and then the user selects the first and last electronic device. The electronic device is manually loaded with a terminal resistor and the last electronic device is manually loaded with a terminal resistor.

Certainly, the present invention also can have other multiple embodiments, without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and deformations according to the present invention, but these corresponding Changes and deformations should belong to the scope of protection of the appended claims of the present invention.

Claims (8)

1. An intelligent terminal resistance device, applied to an electronic device and receiving a driving voltage, the electronic device includes a communication integrated circuit, the communication integrated circuit includes a high potential end and a low potential end, it is characterized in that the intelligent The terminal resistance device includes: an input switch unit, including a first pin, a second pin and a third pin, the third pin of the input switch unit is electrically connected to the low potential end; an input terminal resistance unit, one end is electrically connected to the high potential end, and the other end is electrically connected to the first pin of the input switch unit; An input drive circuit unit electrically connected to the drive voltage and the second pin of the input switch unit, the input drive circuit unit includes an input first resistor unit, one end electrically connected to the drive voltage , the other end is electrically connected to the second pin of the input switch unit; An input terminal short-circuit circuit is set relative to the input terminal drive circuit unit; an output switch unit, including a first pin, a second pin and a third pin, the third pin of the output switch unit is electrically connected to the low potential end; an output end terminal resistance unit, one end is electrically connected to the high potential end, and the other end is electrically connected to the first pin of the output end switch unit; An output end drive circuit unit electrically connected to the drive voltage and the second pin of the output end switch unit, the output end drive circuit unit includes an output end first resistance unit, one end electrically connected to the drive voltage , the other end is electrically connected to the second pin of the output switch unit; and A short-circuit circuit at the output end, which is set relative to the drive circuit unit at the output end; Wherein, when the two smart terminal resistance devices are electrically connected, the input switch unit of the first smart terminal resistance device will be turned on, so the high potential end and the low potential end will be connected to the first smart terminal resistance device. The input terminal resistance unit of the terminal resistance device, the short-circuit circuit of the input terminal of the second intelligent terminal resistance device will ground the second pin of the output switch unit of the first intelligent terminal resistance device, thereby This closes the output terminal switch unit of the first intelligent terminal resistance device, so the high potential terminal and the low potential terminal will not be connected to the output terminal resistance unit of the first intelligent terminal resistance device, and the first terminal terminal resistance unit of the intelligent terminal resistance device The short-circuit circuit of the output end of the intelligent terminal resistance device will ground the second pin of the input end switch unit of the second intelligent terminal resistance device, thereby closing the input end switch of the second intelligent terminal resistance device Unit, so the high potential end and the low potential end will not be connected to the input terminal resistance unit of the second intelligent terminal resistance device, and the output switch unit of the second intelligent terminal resistance device will be turned on, so The high potential end and the low potential end are connected to the output terminal resistance unit of the second intelligent terminal resistance device. 2. The intelligent terminal resistance device according to claim 1, wherein the input drive circuit unit further comprises a second input resistance unit, one end of which is electrically connected to the second pin of the input switch unit , and the other end is electrically connected to ground. 3. The intelligent terminal resistance device according to claim 2, wherein the output drive circuit unit further comprises a second output resistance unit, one end of which is electrically connected to the second pin of the output switch unit , and the other end is electrically connected to ground. 4 . The smart terminal resistor device according to claim 3 , wherein the input switch unit is a transistor switch or a field effect transistor, and the output switch unit is a transistor switch or a field effect transistor. 5. An intelligent terminal resistance device, which is applied to an electronic device and receives a driving voltage. The electronic device includes a communication integrated circuit, and the communication integrated circuit includes a high potential end and a low potential end. It is characterized in that the intelligent The terminal resistance device includes: an input switch unit, including a first pin, a second pin and a third pin, the third pin of the input switch unit is electrically connected to the low potential end; an input terminal resistance unit, one end is electrically connected to the high potential end, and the other end is electrically connected to the first pin of the input switch unit; An input drive circuit unit electrically connected to the drive voltage and the second pin of the input switch unit, the input drive circuit unit includes an input first resistor unit, one end electrically connected to the drive voltage , the other end is electrically connected to the second pin of the input switch unit; A first pin of the input end is electrically connected to the high potential end; The second pin of an input end is electrically connected to the low potential end; The third pin of the input end is set relative to the second pin of the input end; The fourth pin of the input end is electrically connected to the third pin of the input end; a fifth pin of the input end, electrically connected to the second pin of the switch unit of the input end; The sixth pin of an input terminal is electrically connected to the ground; an output switch unit, including a first pin, a second pin and a third pin, the third pin of the output switch unit is electrically connected to the low potential end; an output end terminal resistance unit, one end is electrically connected to the high potential end, and the other end is electrically connected to the first pin of the output end switch unit; An output end drive circuit unit electrically connected to the drive voltage and the second pin of the output end switch unit, the output end drive circuit unit includes an output end first resistance unit, one end electrically connected to the drive voltage , the other end is electrically connected to the second pin of the output switch unit; The first pin of an output end is electrically connected to the high potential end; The second pin of an output end is electrically connected to the low potential end; a third pin of the output end, electrically connected to the second pin of the switch unit of the output end; A fourth pin of the output terminal is electrically connected to the ground; a fifth pin of the output end, which is set relative to the fourth pin of the output end; and The sixth pin of an output end is electrically connected to the fifth pin of the output end. 6. The intelligent terminal resistance device according to claim 5, wherein the input drive circuit unit further comprises a second input resistance unit, one end of which is electrically connected to the second pin of the input switch unit , and the other end is electrically connected to ground. 7. The intelligent terminal resistance device according to claim 6, wherein the output drive circuit unit further comprises a second output resistance unit, one end of which is electrically connected to the second pin of the output switch unit , and the other end is electrically connected to ground. 8 . The smart terminal resistor device according to claim 7 , wherein the input switch unit is a transistor switch or a field effect transistor, and the output switch unit is a transistor switch or a field effect transistor.