CN216252732U - Isolated communication circuit - Google Patents
Isolated communication circuit Download PDFInfo
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- CN216252732U CN216252732U CN202122606068.2U CN202122606068U CN216252732U CN 216252732 U CN216252732 U CN 216252732U CN 202122606068 U CN202122606068 U CN 202122606068U CN 216252732 U CN216252732 U CN 216252732U
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- 238000004891 communication Methods 0.000 title claims abstract description 37
- 238000002955 isolation Methods 0.000 claims abstract description 27
- 239000003990 capacitor Substances 0.000 claims description 69
- 239000013078 crystal Substances 0.000 claims description 3
- 230000010355 oscillation Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 10
- 238000010586 diagram Methods 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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Abstract
The utility model discloses an isolated communication circuit, comprising: the isolating circuit, the frequency selecting circuit and the remote communication circuit are sequentially connected; the isolation circuit includes: the one end of first resistance is connected to the one end of first electric capacity, the base of first triode is all connected to the other end of the other end and first resistance, VCC is connected to the projecting pole of first triode, the one end of second resistance is connected respectively to the collecting electrode, the one end of second electric capacity and the positive pole of first diode, the other end ground connection of second resistance, the negative pole of first diode links to each other with the one end of third resistance, the other end of third resistance respectively with the other end of second electric capacity, the base of second triode, the one end of fourth resistance links to each other, the other end of fourth resistance, the projecting pole of second triode all grounds, the collecting electrode of second triode links to each other with the one end of fifth resistance. By adopting the utility model, the isolation between the processor or the controller and the communication circuit can be realized, and the signal can be adjusted to adapt to long-distance transmission.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to an isolated communication circuit.
Background
With the development of economic society, the application of communication technology in various fields is becoming more and more extensive, and signals sent by a processor or a controller need to be sent to external terminal equipment through a communication circuit, but when the signals sent by the processor or the controller are directly sent out through the communication circuit without being adjusted, the communication circuit causes noise interference to the processor or the controller, and the signals also have the problems that the signals cannot adapt to remote transmission and the like. Accordingly, the present inventors have provided an isolated communication circuit to solve the above problems.
Disclosure of Invention
In order to solve the above problems, it is an object of the present invention to provide an isolated communication circuit, which can achieve isolation between a processor or a controller and the communication circuit, and adjust a signal of the processor or the controller to be suitable for long-distance transmission.
Based on this, the present invention provides an isolated communication circuit, the isolation comprising:
the isolation circuit, the frequency selection circuit and the remote communication circuit are connected in sequence;
the isolation circuit includes: the circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor, a second capacitor, a first triode, a second triode and a first diode; one end of the first capacitor is connected with one end of the first resistor, one end of the first capacitor is also used as a signal input end, the other end of the first capacitor and the other end of the first resistor are both connected with the base of the first triode, the emitter of the first triode is connected with a voltage VCC, the collector of the first triode is respectively connected with one end of the second resistor, one end of the second capacitor and the anode of the first diode, the other end of the second resistor is grounded, the cathode of the first diode is connected with one end of the third resistor, the other end of the third resistor is respectively connected with the other end of the second capacitor, the base of the second triode and one end of the fourth resistor, the other end of the fourth resistor and the emitter of the second triode are both grounded, and the collector of the second triode is connected with one end of the fifth resistor, and the other end of the fifth resistor is used as the output end of the isolation circuit.
Wherein, the frequency selection circuit includes: the first inductor is connected with the first capacitor; one end of the third capacitor is connected with one end of the first inductor, one end of the third capacitor is also used as a signal input end of the frequency selection circuit, the other end of the third capacitor is grounded, the other end of the first inductor is respectively connected with one end of the fourth capacitor and one end of the second inductor, the other end of the fourth capacitor is grounded, and the other end of the second inductor is used as an output end of the frequency selection circuit.
Wherein the remote communication circuit comprises: the wireless transmitting circuit comprises a sixth resistor, a seventh resistor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor and a wireless transmitting chip; the power control input pin of the wireless transmitting chip is connected with the positive power supply end of the wireless transmitting circuit through a sixth resistor, the power supply pin of the wireless transmitting chip is connected with the positive power supply end of the wireless transmitting circuit, the grounding pin of the wireless transmitting chip is grounded, the reference oscillation pin of the wireless transmitting chip is grounded through a crystal oscillator, the standby mode control pin of the wireless transmitting chip is connected with the transmitting/standby mode control end, a printed antenna is connected between the high power transmitting pin and the low power transmitting pin of the wireless transmitting chip, and the data input pin of the wireless transmitting chip is connected with the output end of the frequency selecting circuit; a seventh resistor and an eighth capacitor which are connected in parallel are connected between a power control input pin of the wireless transmitting chip and the ground, and a fifth capacitor, a sixth capacitor and a seventh capacitor which are connected in parallel are connected between a power pin and a ground pin of the wireless transmitting chip.
Wherein the remote communication circuit comprises: the wireless transmitting chip is model MICRF 102.
By adopting the utility model, the isolation circuit can be connected with the output end of the processor (a controller or a singlechip and other control output elements), and the isolation circuit can realize high-reliable high-voltage isolation protection and improve the quality of transmitted waveforms. The frequency selection circuit can tune signals to obtain electric signals with preset frequency, namely electric signals with preset frequency suitable for remote transmission, data received by the remote communication circuit can be sent out by the printed antenna after being processed by the wireless transmitting chip, and the product is simple in structure, small in size and high in anti-interference capacity. By adopting the utility model, the isolation between the processor or the controller and the communication circuit can be realized, and the signal of the processor or the controller is adjusted to adapt to long-distance transmission.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of an isolated communication circuit provided by an embodiment of the present invention;
FIG. 2 is a schematic diagram of an isolation circuit provided by an embodiment of the present invention;
FIG. 3 is a schematic diagram of a frequency selection circuit according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a telecommunications circuit provided by an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic diagram of an isolated communication circuit provided by an embodiment of the present invention, the circuit including:
the device comprises an isolation circuit 101, a frequency selection circuit 102 and a remote communication circuit 103 which are connected in sequence;
fig. 2 is a schematic diagram of an isolation circuit provided in an embodiment of the present invention, where the isolation circuit includes: the circuit comprises a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first capacitor C1, a second capacitor C2, a first triode T1, a second triode T2 and a first diode D1; one end of the first capacitor C1 is connected to one end of the first resistor R1, one end of the first capacitor C1 is further used as a signal input end, the other end of the first capacitor C1 and the other end of the first resistor R1 are both connected to the base of the first triode T1, the emitter of the first triode T1 is connected to the voltage VCC, the collector of the first triode T1 is connected to one end of the second resistor R2, one end of the second capacitor C2 and the anode of the first diode T1, the other end of the second resistor R2 is grounded, the cathode of the first diode T1 is connected to one end of the third resistor R3, the other end of the third resistor R3 is connected to the other end of the second capacitor C2, the base of the second triode T2 and one end of the fourth resistor R4, the other end of the fourth resistor R4 and the emitter 2 of the second triode T362, the collector of the second transistor T2 is connected to one end of the fifth resistor R5, and the other end of the fifth resistor R5 serves as the output terminal of the isolation circuit.
The isolation circuit mainly comprises a first triode T1 for completing level conversion, a second triode T2 for completing level recovery, a first triode T1 with B-as a reference ground, and a second triode T2 with P-as a reference ground, wherein the first triode T1 completes communication ground isolation of transmission. The connection between the first triode T1 and the second triode T2 adopts the isolation of a first diode D1 and a second capacitor C2, when P-is high voltage, the signal is firstly isolated by the second triode T2 and then isolated by two devices of a first diode D1 and a second capacitor C2, and cannot be transmitted to the inside of the processor, so that high-reliability high-voltage isolation protection can be realized. The first capacitor C1 and the second capacitor C2 in the circuit use capacitors with small capacitance values, and are mainly used for accelerating the starting process of a triode, improving the edge slope during transmission level conversion and improving the quality of transmission waveforms, so that the high-frequency communication of more than 100kbps can be met.
Fig. 3 is a schematic diagram of a frequency selection circuit provided in an embodiment of the present invention, where the frequency selection circuit includes: a third capacitor C3, a fourth capacitor C4, a first inductor L1 and a second inductor L2; one end of the third capacitor C3 is connected to one end of the first inductor L1, one end of the third capacitor C3 is further used as a signal input end of the frequency selection circuit, the other end of the third capacitor C3 is grounded, the other end of the first inductor L1 is connected to one end of the fourth capacitor C4 and one end of the second inductor L2, the other end of the fourth capacitor C4 is grounded, and the other end of the second inductor L2 is used as an output end of the frequency selection circuit.
The frequency selection circuit is used for converting the electric signal into an electric signal with a preset frequency and outputting the electric signal to the remote communication circuit.
Fig. 4 is a schematic diagram of a telecommunication circuit provided by an embodiment of the present invention, the telecommunication circuit including: a sixth resistor R6, a seventh resistor R7, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8 and a wireless transmitting chip; the power control input pin of the wireless transmitting chip is connected with the positive power supply end of the wireless transmitting circuit through a sixth resistor R6, the power supply pin of the wireless transmitting chip is connected with the positive power supply end of the wireless transmitting circuit, the grounding pin of the wireless transmitting chip is grounded, the reference oscillation pin of the wireless transmitting chip is grounded through a crystal oscillator, the standby mode control pin of the wireless transmitting chip is connected with the transmitting/standby mode control end, a printed antenna is connected between the power transmitting high pin and the power transmitting low pin of the wireless transmitting chip, and the data input pin of the wireless transmitting chip is connected with the output end of the frequency selecting circuit; a seventh resistor R7 and an eighth capacitor C8 which are connected in parallel are connected between a power control input pin of the wireless transmitting chip and the ground, and a fifth capacitor C5, a sixth capacitor C6 and a seventh capacitor C7 which are connected in parallel are connected between a power supply pin and a ground pin of the wireless transmitting chip.
Wherein the remote communication circuit comprises: the wireless transmitting chip is model MICRF 102.
The remote communication circuit has the advantages of simple structure, small volume and strong anti-interference capability, and can realize wireless automatic tuning.
By adopting the utility model, the isolation circuit can be connected with the output end of the processor (a controller or a singlechip and other control output elements), and the isolation circuit can realize high-reliable high-voltage isolation protection and improve the quality of transmitted waveforms. The frequency selection circuit can tune signals to obtain electric signals with preset frequency, namely electric signals with preset frequency suitable for remote transmission, data received by the remote communication circuit can be sent out by the printed antenna after being processed by the wireless transmitting chip, and the product is simple in structure, small in size and high in anti-interference capacity. By adopting the utility model, the isolation between the processor or the controller and the communication circuit can be realized, and the signal of the processor or the controller is adjusted to adapt to long-distance transmission.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (4)
1. An isolated communication circuit, comprising:
the isolation circuit, the frequency selection circuit and the remote communication circuit are connected in sequence;
the isolation circuit includes: the circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor, a second capacitor, a first triode, a second triode and a first diode; one end of the first capacitor is connected with one end of the first resistor, one end of the first capacitor is also used as a signal input end, the other end of the first capacitor and the other end of the first resistor are both connected with the base of the first triode, the emitter of the first triode is connected with a voltage VCC, the collector of the first triode is respectively connected with one end of the second resistor, one end of the second capacitor and the anode of the first diode, the other end of the second resistor is grounded, the cathode of the first diode is connected with one end of the third resistor, the other end of the third resistor is respectively connected with the other end of the second capacitor, the base of the second triode and one end of the fourth resistor, the other end of the fourth resistor and the emitter of the second triode are both grounded, and the collector of the second triode is connected with one end of the fifth resistor, and the other end of the fifth resistor is used as the output end of the isolation circuit.
2. The isolated communication circuit of claim 1, wherein the frequency selection circuit comprises: the first inductor is connected with the first capacitor; one end of the third capacitor is connected with one end of the first inductor, one end of the third capacitor is also used as a signal input end of the frequency selection circuit, the other end of the third capacitor is grounded, the other end of the first inductor is respectively connected with one end of the fourth capacitor and one end of the second inductor, the other end of the fourth capacitor is grounded, and the other end of the second inductor is used as an output end of the frequency selection circuit.
3. The isolated communication circuit of claim 1, wherein the remote communication circuit comprises: the wireless transmitting circuit comprises a sixth resistor, a seventh resistor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor and a wireless transmitting chip; the power control input pin of the wireless transmitting chip is connected with the positive power supply end of the wireless transmitting circuit through a sixth resistor, the power supply pin of the wireless transmitting chip is connected with the positive power supply end of the wireless transmitting circuit, the grounding pin of the wireless transmitting chip is grounded, the reference oscillation pin of the wireless transmitting chip is grounded through a crystal oscillator, the standby mode control pin of the wireless transmitting chip is connected with the transmitting/standby mode control end, a printed antenna is connected between the high power transmitting pin and the low power transmitting pin of the wireless transmitting chip, and the data input pin of the wireless transmitting chip is connected with the output end of the frequency selecting circuit; a seventh resistor and an eighth capacitor which are connected in parallel are connected between a power control input pin of the wireless transmitting chip and the ground, and a fifth capacitor, a sixth capacitor and a seventh capacitor which are connected in parallel are connected between a power pin and a ground pin of the wireless transmitting chip.
4. The isolated communication circuit of claim 3, wherein the remote communication circuit comprises: the wireless transmitting chip is model MICRF 102.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122606068.2U CN216252732U (en) | 2021-10-28 | 2021-10-28 | Isolated communication circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122606068.2U CN216252732U (en) | 2021-10-28 | 2021-10-28 | Isolated communication circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216252732U true CN216252732U (en) | 2022-04-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122606068.2U Active CN216252732U (en) | 2021-10-28 | 2021-10-28 | Isolated communication circuit |
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| Country | Link |
|---|---|
| CN (1) | CN216252732U (en) |
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2021
- 2021-10-28 CN CN202122606068.2U patent/CN216252732U/en active Active
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Effective date of registration: 20231031 Address after: No. 902, 9th Floor, Unit 1, Building 1, No. 163 Sanse Road, Industrial Park, Jinjiang District, Chengdu City, Sichuan Province, 610011 Patentee after: Chengdu Fangyang Technology Co.,Ltd. Address before: 450001 room 1108, building 8, newtech Park, No. 11 Lianhua street, high tech Industrial Development Zone, Zhengzhou, Henan Province Patentee before: Henan Puda Information Technology Co.,Ltd. |
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| TR01 | Transfer of patent right |