CN212695995U - Modulation-demodulation circuit of low-speed long-distance optical transmitter and receiver - Google Patents
Modulation-demodulation circuit of low-speed long-distance optical transmitter and receiver Download PDFInfo
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- CN212695995U CN212695995U CN202021434533.8U CN202021434533U CN212695995U CN 212695995 U CN212695995 U CN 212695995U CN 202021434533 U CN202021434533 U CN 202021434533U CN 212695995 U CN212695995 U CN 212695995U
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Abstract
The utility model relates to the relevant technical field of optical transceiver modulation and demodulation, which comprises a wiring terminal, a power supply module, a conversion module, a transmitting frequency modulation module, a receiving adjustment module and an optical module, wherein the conversion module is communicated with the power supply module through the wiring terminal; the conversion module is connected with a transmitting frequency modulation module and a receiving regulation module in parallel; the transmitting frequency modulation module and the receiving adjusting module are simultaneously connected to the optical module; the wiring terminal is provided with two wire inlet ends and two wire outlet ends; a first electrolytic capacitor, a voltage reduction chip, a voltage stabilizing diode, an inductor, a second electrolytic capacitor, a third electrolytic capacitor, a first resistor, a second resistor, a voltage stabilizing chip and a fourth electrolytic capacitor are sequentially connected between two wire inlet ends of the wiring terminal; the technical scheme can provide the modulation and demodulation circuit which can solve the problems of complex circuit, large number of components and short transmission distance in the prior art.
Description
Technical Field
The utility model relates to an optical transmitter and receiver modem correlation technique field, concretely relates to remote optical transmitter and receiver modem circuit of low-speed.
Background
In the application of low-speed data optical transmission in the traditional industrial control field, the rail transit monitoring field and the like, the transmission distance is limited to be within 20 km. The optical module can not transmit low-speed data with the characteristics of burst signals, namely, the line can not be maintained in a state of 0 or 1 for a long time, and a coding/decoding (modulation/demodulation) circuit is added.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a remote optical transmitter and receiver modem circuit of low-speed to solve the current modem circuit that proposes in the above-mentioned background art complicated, the many and short technical problem of transmission distance of components and parts quantity.
In order to achieve the above object, the utility model provides a following technical scheme: a modulation and demodulation circuit of a low-speed remote optical transmitter and receiver comprises a wiring terminal, a power supply module, a conversion module, a transmitting frequency modulation module, a receiving regulation module and an optical module, wherein the conversion module is communicated with the power supply module through the wiring terminal; the conversion module is connected with a transmitting frequency modulation module and a receiving regulation module in parallel; the transmitting frequency modulation module and the receiving regulation module are simultaneously connected to the optical module; the wiring terminal is provided with two wire inlet ends and two wire outlet ends; a first electrolytic capacitor, a voltage reduction chip, a voltage stabilizing diode, an inductor, a second electrolytic capacitor, a third electrolytic capacitor, a first resistor, a second resistor, a voltage stabilizing chip and a fourth electrolytic capacitor are sequentially connected between two wire inlet ends of the wiring terminal, and the first electrolytic capacitor, the voltage stabilizing diode, the second electrolytic capacitor, the third electrolytic capacitor, the second resistor and the fourth electrolytic capacitor are all connected with a grounding end through wires; a third resistor, a transient suppression diode, a fourth resistor, a fifth resistor, a level conversion chip, a first stepless capacitor and a trigger are sequentially connected between two wire outlet ends of the wiring terminal, and the fourth resistor, the level conversion chip, the first stepless capacitor and the trigger are all connected with the ground through wires; the transmitting frequency modulation module consists of a first active crystal oscillator, a second active crystal oscillator and an analog switch; one wire outlet end of the conversion module is connected with the analog switch through a wire, and two interfaces of the analog switch are respectively connected with a grounding end through a first active crystal oscillator and a second active crystal oscillator; the receiving and adjusting module consists of a sixth resistor, a precise operational amplifier, a seventh resistor, an eighth resistor, a ninth resistor and a second stepless capacitor; the wire outlet end of the conversion module is sequentially connected with a sixth resistor, a precise operational amplifier and a second stepless capacitor in series through a lead; the connection end of the precision operational amplifier is connected with the grounding end after passing through a seventh resistor and a ninth resistor respectively; and the conversion module and the wire outlet end of the second stepless capacitor are connected to the optical module through wires.
As a further improvement, power module, conversion module, transmission frequency modulation module and receipt adjusting module still have power indicator, no light fault indicator, send the pilot lamp and receive the pilot lamp through circuit electric connection respectively.
As a further improvement of the utility model, the first electrolytic capacitor adopts an electrolytic capacitor with the parameter of 100 muF/50V; the second electrolytic capacitor and the third electrolytic capacitor both adopt electrolytic capacitors with the parameter of 470 muF/10V.
As a further improvement of the utility model, the inductance adopts the inductance with the parameter of 22 mu H.
As a further improvement, the 1K resistor model is selected for use to first resistance and second resistance.
As a further improvement of the utility model, the voltage reduction chip specifically adopts a DCDC voltage reduction chip with the model number XL 1509; the voltage stabilizing chip is specifically an LDO voltage stabilizing chip with the model number of SPX 3819.
As a further improvement of the present invention, the level conversion chip is a conversion chip with a model number of MAX 3485; the trigger adopts a chip with the model NC7SZ14M 5.
As a further improvement of the utility model, the precision operational amplifier adopts an amplifier of LM321 model series.
As a further improvement of the present invention, the optical module adopts the model to be 84M photoelectric conversion module.
Compared with the prior art, the beneficial effects of the utility model are that: the technical scheme is composed of an electric wiring terminal, a power supply module, a conversion module, a transmitting frequency modulation module, a receiving regulation module and an optical module, wherein the input range of the power supply module is 7.5-24V, so that a wide-range power supply scheme is realized; the level conversion module in the technical scheme can convert the communication bus signal at the equipment side into the level signal required by the modulation and demodulation circuit, for example, the level conversion module is configured to convert RS485 signals into UART signals, or the level conversion module is configured to convert RS232 signals into UART signals, or convert RS422 signals into UART signals, and the conversion types are various; the transmitting frequency modulation and receiving adjustment module part of the technical scheme generates two lines of square waves by adopting the set bicrystal vibration and then drives the optical module by using the analog switch to switch different frequencies according to the state; the signal demodulation circuit receives the output signal converted by the optical module, and the filter circuit outputs the detected signal.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
In the figure: 1. a wiring terminal; 2. a power supply module; 3. a conversion module; 4. a transmission frequency modulation module; 5. a receiving and adjusting module; 6. an optical module; 7. a first electrolytic capacitor; 8. a voltage reduction chip; 9. a voltage regulator diode; 10. an inductance; 11. a second electrolytic capacitor; 12. a third electrolytic capacitor; 13. a first resistor; 14. a second resistor; 15. a voltage stabilization chip; 16. a fourth electrolytic capacitor; 17. a ground terminal; 18. a third resistor; 19. a transient suppression diode; 20. a fourth resistor; 21. a fifth resistor; 22. a level conversion chip; 23. a first stepless capacitor; 24. a trigger; 25. a first active crystal oscillator; 26. a second active crystal oscillator; 27. an analog switch; 28. a sixth resistor; 29. a precision operational amplifier; 30. a seventh resistor; 31. an eighth resistor; 32. a ninth resistor; 33. and a second stepless capacitor.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: a modulation and demodulation circuit of a low-speed remote optical transmitter and receiver comprises a wiring terminal 1, a power module 2, a conversion module 3, a transmitting frequency modulation module 4, a receiving regulation module 5 and an optical module 6, wherein the conversion module 3 is communicated with the power module 2 through the wiring terminal 1; the conversion module 3 is connected with a transmitting frequency modulation module 4 and a receiving regulation module 5 in parallel; the transmission frequency modulation module 4 and the reception adjustment module 5 are simultaneously connected to the optical module 6.
The wiring terminal 1 is provided with two wire inlet ends and two wire outlet ends; a first electrolytic capacitor 7, a voltage reduction chip 8, a voltage stabilizing diode 9, an inductor 10, a second electrolytic capacitor 11, a third electrolytic capacitor 12, a first resistor 13, a second resistor 14, a voltage stabilizing chip 15 and a fourth electrolytic capacitor 16 are sequentially connected between two wire inlet ends of the wiring terminal 1, and the first electrolytic capacitor 7, the voltage stabilizing diode 9, the second electrolytic capacitor 11, the third electrolytic capacitor 12, the second resistor 14 and the fourth electrolytic capacitor 16 are all connected with a grounding terminal 17 through wires.
A third resistor 18, a transient suppression diode 19, a fourth resistor 20, a fifth resistor 21, a level conversion chip 22, a first stepless capacitor 23 and a trigger 24 are sequentially connected between two wire outgoing ends of the wiring terminal 1, and the fourth resistor 20, the level conversion chip 22, the first stepless capacitor 23 and the trigger 24 are all connected to the ground through wires.
The transmitting frequency modulation module 4 consists of a first active crystal oscillator 25, a second active crystal oscillator 26 and an analog switch 27; one outlet terminal of the conversion module 3 is connected to the analog switch 27 through a wire, and two interfaces of the analog switch 27 are connected to the ground terminal through the first active crystal oscillator 25 and the second active crystal oscillator 26, respectively.
The receiving and adjusting module 5 consists of a sixth resistor 28, a precision operational amplifier 29, a seventh resistor 30, an eighth resistor 31, a ninth resistor 32 and a second stepless capacitor 33; the outlet end of the conversion module 3 is connected in series with a sixth resistor 28, a precise operational amplifier 29 and a second stepless capacitor 33 in sequence through a lead; the connection end of the precision operational amplifier 29 is connected with the ground end after passing through a seventh resistor 30 and a ninth resistor 32 respectively; the outlet terminals of the conversion module 3 and the second stepless capacitor 33 are connected to the optical module 6 through wires.
The power module 2, the conversion module 3, the transmitting frequency modulation module 4 and the receiving regulation module 5 are also electrically connected with a power indicator lamp, a non-light fault indicator lamp, a sending indicator lamp and a receiving indicator lamp respectively through circuits; the first electrolytic capacitor 7 adopts an electrolytic capacitor with the parameter of 100 mu F/50V; the second electrolytic capacitor 11 and the third electrolytic capacitor 12 both adopt electrolytic capacitors with the parameter of 470 muF/10V; the inductor 10 adopts an inductor with a parameter of 22 muH; the first resistor 13 and the second resistor 14 are 1K resistor types; the voltage reduction chip 8 specifically adopts a DCDC voltage reduction chip with the model XL 1509; the voltage stabilizing chip 15 is specifically an LDO voltage stabilizing chip with the model number of SPX 3819; the level conversion chip 22 adopts a conversion chip with the model number of MAX 3485; the trigger 24 adopts a chip with the model number of NC7SZ14M 5; the precision operational amplifier 29 adopts an LM321 model series amplifier; the optical module 6 adopts a 84M photoelectric conversion module.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A modulation-demodulation circuit of a low-speed long-distance optical transceiver is characterized in that: the device comprises a wiring terminal (1), a power supply module (2), a conversion module (3), a transmitting frequency modulation module (4), a receiving regulation module (5) and an optical module (6), wherein the conversion module (3) is communicated with the power supply module (2) through the wiring terminal (1); the conversion module (3) is connected with a transmitting frequency modulation module (4) and a receiving regulation module (5) in parallel; the transmitting frequency modulation module (4) and the receiving regulation module (5) are simultaneously connected to the optical module (6); the wiring terminal (1) is provided with two wire inlet ends and two wire outlet ends; a first electrolytic capacitor (7), a voltage reduction chip (8), a voltage stabilizing diode (9), an inductor (10), a second electrolytic capacitor (11), a third electrolytic capacitor (12), a first resistor (13), a second resistor (14), a voltage stabilizing chip (15) and a fourth electrolytic capacitor (16) are sequentially connected between two wire inlet ends of the wiring terminal (1), and the first electrolytic capacitor (7), the voltage stabilizing diode (9), the second electrolytic capacitor (11), the third electrolytic capacitor (12), the second resistor (14) and the fourth electrolytic capacitor (16) are all connected with a grounding end (17) through wires; a third resistor (18), a transient suppression diode (19), a fourth resistor (20), a fifth resistor (21), a level conversion chip (22), a first stepless capacitor (23) and a trigger (24) are sequentially connected between two wire outlet ends of the wiring terminal (1), and the fourth resistor (20), the level conversion chip (22), the first stepless capacitor (23) and the trigger (24) are all connected with the ground through wires; the transmitting frequency modulation module (4) consists of a first active crystal oscillator (25), a second active crystal oscillator (26) and an analog switch (27); one wire outlet end of the conversion module (3) is connected with an analog switch (27) through a lead, and two interfaces of the analog switch (27) are respectively connected with a ground end through a first active crystal oscillator (25) and a second active crystal oscillator (26); the receiving and adjusting module (5) consists of a sixth resistor (28), a precise operational amplifier (29), a seventh resistor (30), an eighth resistor (31), a ninth resistor (32) and a second stepless capacitor (33); the outlet end of the conversion module (3) is connected in series with a sixth resistor (28), a precise operational amplifier (29) and a second stepless capacitor (33) in sequence through a lead; the connection end of the precision operational amplifier (29) is connected with the grounding end after passing through a seventh resistor (30) and a ninth resistor (32) respectively; and the outlet ends of the conversion module (3) and the second stepless capacitor (33) are connected to the optical module (6) through wires.
2. A low speed long distance optical transceiver modem circuit according to claim 1, wherein: the power module (2), the conversion module (3), the transmitting frequency modulation module (4) and the receiving regulation module (5) are respectively and electrically connected with a power indicator lamp, a non-light fault indicator lamp, a sending indicator lamp and a receiving indicator lamp through circuits.
3. A low speed long distance optical transceiver modem circuit according to claim 1, wherein: the first electrolytic capacitor (7) adopts an electrolytic capacitor with the parameter of 100 mu F/50V; the second electrolytic capacitor (11) and the third electrolytic capacitor (12) both adopt electrolytic capacitors with the parameter of 470 muF/10V.
4. A low speed long distance optical transceiver modem circuit according to claim 1, wherein: the inductor (10) adopts an inductor with the parameter of 22 mu H.
5. A low speed long distance optical transceiver modem circuit according to claim 1, wherein: the first resistor (13) and the second resistor (14) are 1K resistor types.
6. A low speed long distance optical transceiver modem circuit according to claim 1, wherein: the voltage reduction chip (8) is a DCDC voltage reduction chip with the model number XL 1509; the voltage stabilizing chip (15) is specifically an LDO voltage stabilizing chip with the model number of SPX 3819.
7. A low speed long distance optical transceiver modem circuit according to claim 1, wherein: the level conversion chip (22) adopts a conversion chip with the model number of MAX 3485; the trigger (24) adopts a chip with the model number of NC7SZ14M 5.
8. A low speed long distance optical transceiver modem circuit according to claim 1, wherein: the precision operational amplifier (29) adopts an LM321 model series amplifier.
9. A low speed long distance optical transceiver modem circuit according to claim 1, wherein: the optical module (6) adopts a 84M photoelectric conversion module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021434533.8U CN212695995U (en) | 2020-07-20 | 2020-07-20 | Modulation-demodulation circuit of low-speed long-distance optical transmitter and receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021434533.8U CN212695995U (en) | 2020-07-20 | 2020-07-20 | Modulation-demodulation circuit of low-speed long-distance optical transmitter and receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212695995U true CN212695995U (en) | 2021-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021434533.8U Expired - Fee Related CN212695995U (en) | 2020-07-20 | 2020-07-20 | Modulation-demodulation circuit of low-speed long-distance optical transmitter and receiver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212695995U (en) |
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2020
- 2020-07-20 CN CN202021434533.8U patent/CN212695995U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210312 Termination date: 20210720 |