CN201699682U - Low-speed optical coupler accelerating circuit - Google Patents
Low-speed optical coupler accelerating circuit Download PDFInfo
- Publication number
- CN201699682U CN201699682U CN2010202044482U CN201020204448U CN201699682U CN 201699682 U CN201699682 U CN 201699682U CN 2010202044482 U CN2010202044482 U CN 2010202044482U CN 201020204448 U CN201020204448 U CN 201020204448U CN 201699682 U CN201699682 U CN 201699682U
- Authority
- CN
- China
- Prior art keywords
- circuit
- speed optical
- optical coupler
- npn triode
- low
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Electronic Switches (AREA)
- Led Devices (AREA)
Abstract
The utility model discloses a low-speed optical coupler accelerating circuit, which comprises a low-speed optical coupler. The low-speed optical coupler comprises a light emitting diode and a photo-transistor, as well as a first switch-type NPN triode, a second switch-type NPN triode and a first RC circuit and a second RC circuit. The anode of the light emitting diode is connected with a pulse high-level power supply through a pull-up resistor, and the cathode is connected with the collecting electrode of the first switch-type NPN triode; and the collecting electrode of the photo-transistor is connected the output signal power supply end, and the transmitting electrode is connected with the base electrode of the second switch-type NPN triode through the first RC circuit. Compared with the prior art, the low-speed optical coupler accelerating circuit comprehensively improves the performance of the low-speed optical coupler applied in high-speed pulse signal isolation transmission in input and output aspects, so as to expand the application range of the low-speed optical coupler, save device cost and make remarkable improvement.
Description
Technical field
The utility model relates to a kind of optical coupling acceleration circuit, particularly be a kind of circuit low speed optical coupling acceleration circuit simple, with low cost, this circuit has been realized the high-speed pulse buffer circuit that high speed photo coupling could be realized by adopting the low speed optic coupling element.
Background technology
Therefore optical coupler is the element of the media transmission signal of telecommunication with light, because it has the good isolation effect to input, the output signal of telecommunication, in the various signal circuits that need electrical isolation, has widely and uses.Optical coupler generally is made up of three parts: the emission of light, the reception of light and signal amplify.The signal of telecommunication driven for emitting lights diode of input makes it to send the light of certain wavelength, is received by photo-detector and produces photoelectric current, again through further amplifying back output.This has just finished the conversion of electrical-optical-electricity, thereby plays the effect of input, output, isolation.Owing to isolate mutually between the optical coupler input and output, signal of telecommunication transmission has characteristics such as one-way, thereby has good electrical isolation capabilities and antijamming capability.
Present optical coupler mainly includes: low speed optocoupler and high speed photo coupling, wherein the most frequently used is the low speed optocoupler, because LED is after luminous end in the low speed optocoupler, phototriode need be waited until after the son extraction of damming of base stage finishes and could turn-off, therefore there is bigger transmission delay, transmission rate is very low, generally has only 5～10Kbps; The transmission rate of high speed photo coupling can reach more than the 10Mbps, but high speed photo coupling has also increased circuit such as signal amplification, shaping except light receiving element, so its cost and price is high more a lot of than low speed optocoupler.
Summary of the invention
In view of this, the purpose of this utility model is to provide a kind of low speed optical coupling acceleration circuit, to solve in the present high-speed pulse signal circuit the low and high speed photo coupling cost price problem of higher of low speed optocoupler transmission rate.
For achieving the above object, the utility model is mainly by the following technical solutions:
A kind of low speed optical coupling acceleration circuit, comprise low speed optical coupler (P1), this low speed optical coupler (P1) is made of light-emitting diode and phototriode, wherein also comprise the first switching mode NPN triode (T1), second switch type NPN triode (T2) and a RC circuit, the 2nd RC circuit, the anode of described light-emitting diode is connected with the pulse high level power supply by pull-up resistor (R1), and negative electrode is connected with the collector electrode of the first switching mode NPN triode (T1); The collector electrode of described phototriode is connected with the output signal power end, and emitter is connected with the base stage of second switch type NPN triode (T2) by a RC circuit.
The base stage of the wherein said first switching mode NPN triode (T1) is connected with the 2nd RC circuit.
A wherein said RC circuit is formed in parallel by first speed-up capacitor (C1) and first current-limiting resistance (R2).
Wherein said the 2nd RC circuit is formed in parallel by second speed-up capacitor (C2) and second current-limiting resistance (R3).
Also be connected with a resistance to earth (R4) between wherein said phototriode emitter and the second switch type NPN triode (T2).
Wherein at the input of optocoupler, the high-frequency pulse voltage signal converts current pulse signal fast to by the first switching mode NPN triode, be input to the light-emitting diode of low speed optical coupler, and light-emitting diode changes the light-emitting diode on state current of optocoupler by the setting of pull-up resistance values, under same transfer ratio CTR condition, suitably strengthen the delay that electric current can reduce the signal rising edge;
At the output of optocoupler, the phototriode collector electrode of optocoupler is connected to power positive end, and its emitter is connected in series to the base stage of NPN pipe by the RC circuit of parallel connection, output pulse signal behind the optocoupler driving triode.
In the described output-stage circuit, first electric capacity provides low impedance path for high-frequency signal, has quickened second switch type NPN triode switch speed, and second switch type NPN triode drives the delay that has reduced greatly because of optocoupler itself to the amplification of optocoupler output current.
Compared with prior art, the utility model is owing to comprehensively improved the performance of low speed optocoupler when being applied to the transmission of high-speed pulse Signal Spacing from two aspects of input and output, therefore expand the range of application of low speed optocoupler, saved device cost, therefore had obvious improvement.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
For setting forth thought of the present utility model and purpose, the utility model is described further below in conjunction with the drawings and specific embodiments.
See also shown in Figure 1, the low speed optical coupling acceleration circuit that the utility model provides, comprise low speed optical coupler P1, this low speed optical coupler P1 is made of light-emitting diode and phototriode, wherein also comprise the first switching mode NPN triode T1, second switch type NPN triode T2 and a RC circuit, the 2nd RC circuit, wherein a RC circuit is formed in parallel by the first speed-up capacitor C1 and the first current-limiting resistance R2, and the 2nd RC circuit is formed in parallel by the second speed-up capacitor C2 and the second current-limiting resistance R3.
Wherein the light-emitting diodes tube anode among the low speed optical coupler P1 is connected with the pulse high level power supply by pull-up resistor R1, negative electrode is connected with the collector electrode of the first switching mode NPN triode T1, the base stage of the first switching mode NPN triode T1 then is connected to the high-speed pulse signal input part by the 2nd RC circuit, and also is connected with resistance R 6 between the emitter of the first switching mode NPN triode T1 and the 2nd RC circuit; The collector electrode of described phototriode is connected with the output signal power end, and be pulled to the anode of signal power source by resistance R 5, emitter is connected with the base stage of second switch type NPN triode T2 by a RC circuit, and is connected with resistance to earth R4 between the emitter of the emitter of second switch type NPN triode T2 and phototriode.
The utility model operation principle is: at the input side of optocoupler, anode 1 pin of light-emitting diode is connected to the high level power end of pulse by pull-up resistor R1, negative electrode 2 pin extremely link to each other with the collector electrode C of first switching mode NPN pipe T1, the T1 emitter E utmost point then is connected to the low level ground end of impulse level, current-limiting resistance R3 goes up in parallel and one quickens little capacitor C 2 and be connected with the T1 base stage, wherein C2 can improve the switching speed of triode T1, the high-frequency impulse waveform is through speed-up capacitor C2 and current-limiting resistance R3, drive the break-make of T1 pipe, because the electric current amplification characteristic of triode, this switching signal is converted into the fast current pulse signal of certain value; At the optocoupler outlet side, 4 pin of phototriode collector electrode are connected to the power positive end of output signal, phototriode emitter 3 pin link to each other with NPN triode T2 base stage with the parallel circuits of speed-up capacitor C1 by serial connection current-limiting resistance R2, the collector electrode of T2 is moved the anode of signal power source on resistance R 5, the signal output of this collector electrode, T2 emission collection connects the power supply ground end of signal.Resistance R 2 adds a resistance to earth R4 with optocoupler 3 pin tie points, in optocoupler transfer ratio allowed band, reduces the R4 resistance as far as possible and can reduce the triode turn off delay time, can further improve the operating frequency that can transmit.
More than a kind of low speed optical coupling acceleration circuit provided by the utility model is described in detail, used specific case herein principle of the present utility model and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present utility model and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present utility model, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model.
Claims (5)
1. low speed optical coupling acceleration circuit, comprise low speed optical coupler (P1), this low speed optical coupler (P1) is made of light-emitting diode and phototriode, it is characterized in that also comprising the first switching mode NPN triode (T1), second switch type NPN triode (T2) and a RC circuit, the 2nd RC circuit, the anode of described light-emitting diode is connected with the pulse high level power supply by pull-up resistor (R1), and negative electrode is connected with the collector electrode of the first switching mode NPN triode (T1); The collector electrode of described phototriode is connected with the output signal power end, and emitter is connected with the base stage of second switch type NPN triode (T2) by a RC circuit.
2. low speed optical coupling acceleration circuit according to claim 1 is characterized in that the base stage of the described first switching mode NPN triode (T1) is connected with the 2nd RC circuit.
3. low speed optical coupling acceleration circuit according to claim 1 is characterized in that a described RC circuit is formed in parallel by first speed-up capacitor (C1) and first current-limiting resistance (R2).
4. low speed optical coupling acceleration circuit according to claim 1 and 2 is characterized in that described the 2nd RC circuit is formed in parallel by second speed-up capacitor (C2) and second current-limiting resistance (R3).
5. low speed optical coupling acceleration circuit according to claim 1 is characterized in that also being connected with a resistance to earth (R4) between described phototriode emitter and the second switch type NPN triode (T2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202044482U CN201699682U (en) | 2010-05-21 | 2010-05-21 | Low-speed optical coupler accelerating circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202044482U CN201699682U (en) | 2010-05-21 | 2010-05-21 | Low-speed optical coupler accelerating circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201699682U true CN201699682U (en) | 2011-01-05 |
Family
ID=43400927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202044482U Expired - Lifetime CN201699682U (en) | 2010-05-21 | 2010-05-21 | Low-speed optical coupler accelerating circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201699682U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103595377A (en) * | 2013-11-20 | 2014-02-19 | 桂林机床电器有限公司 | Control circuit of switch of audion |
| CN103840815A (en) * | 2014-03-19 | 2014-06-04 | 成都引众数字设备有限公司 | Electrical independent contact output interface circuit with strong interference resistance |
| CN104038203A (en) * | 2013-03-06 | 2014-09-10 | 欣旺达电子股份有限公司 | Optocoupler communication acceleration system |
| CN104993676A (en) * | 2015-06-26 | 2015-10-21 | 徐州上若科技有限公司 | Circuit for controlling DC capacitor voltage discharge of bus |
| US9472695B2 (en) | 2012-04-18 | 2016-10-18 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Opto-coupler and method of manufacturing the same |
| CN107765194A (en) * | 2017-10-09 | 2018-03-06 | 福建成达兴智能科技股份有限公司 | A kind of flashing light tester |
| CN108710473A (en) * | 2018-04-27 | 2018-10-26 | 江苏华存电子科技有限公司 | A kind of efficiency accelerated method of flash-memory storage system |
| CN109355821A (en) * | 2018-09-26 | 2019-02-19 | 浙江众邦机电科技有限公司 | A kind of isolation and transmission circuit and isolation encoder system |
| CN109861682A (en) * | 2019-03-21 | 2019-06-07 | 联桥科技有限公司 | A kind of photoelectric coupled circuit and photoelectrical coupler for middling speed communication |
| CN110535458A (en) * | 2019-07-16 | 2019-12-03 | 青岛乾程科技股份有限公司 | A kind of signal rate Amplification and insulation transmission circuit |
-
2010
- 2010-05-21 CN CN2010202044482U patent/CN201699682U/en not_active Expired - Lifetime
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9472695B2 (en) | 2012-04-18 | 2016-10-18 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Opto-coupler and method of manufacturing the same |
| CN104038203A (en) * | 2013-03-06 | 2014-09-10 | 欣旺达电子股份有限公司 | Optocoupler communication acceleration system |
| CN104038203B (en) * | 2013-03-06 | 2017-04-05 | 欣旺达电子股份有限公司 | Optocoupler communication acceleration system |
| CN103595377A (en) * | 2013-11-20 | 2014-02-19 | 桂林机床电器有限公司 | Control circuit of switch of audion |
| CN103840815A (en) * | 2014-03-19 | 2014-06-04 | 成都引众数字设备有限公司 | Electrical independent contact output interface circuit with strong interference resistance |
| CN104993676A (en) * | 2015-06-26 | 2015-10-21 | 徐州上若科技有限公司 | Circuit for controlling DC capacitor voltage discharge of bus |
| CN107765194A (en) * | 2017-10-09 | 2018-03-06 | 福建成达兴智能科技股份有限公司 | A kind of flashing light tester |
| CN107765194B (en) * | 2017-10-09 | 2023-08-18 | 福建成达兴智能科技股份有限公司 | Explosion flash lamp tester |
| CN108710473A (en) * | 2018-04-27 | 2018-10-26 | 江苏华存电子科技有限公司 | A kind of efficiency accelerated method of flash-memory storage system |
| CN109355821A (en) * | 2018-09-26 | 2019-02-19 | 浙江众邦机电科技有限公司 | A kind of isolation and transmission circuit and isolation encoder system |
| CN109355821B (en) * | 2018-09-26 | 2021-02-12 | 浙江众邦机电科技有限公司 | Isolation transmission circuit and isolation encoder system |
| CN109861682A (en) * | 2019-03-21 | 2019-06-07 | 联桥科技有限公司 | A kind of photoelectric coupled circuit and photoelectrical coupler for middling speed communication |
| CN109861682B (en) * | 2019-03-21 | 2023-11-28 | 联桥科技有限公司 | Optical coupler circuit and optical coupler for medium-speed communication |
| CN110535458A (en) * | 2019-07-16 | 2019-12-03 | 青岛乾程科技股份有限公司 | A kind of signal rate Amplification and insulation transmission circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201699682U (en) | Low-speed optical coupler accelerating circuit | |
| CN101640527A (en) | IGBT driving circuit capable of realizing signal transmission by pulse modulation demodulation system | |
| CN201699683U (en) | Photoelectrical coupling circuit for improving data transfer rate | |
| CN101262220B (en) | Optical coupling acceleration circuit | |
| CN209088922U (en) | High-speed isolated communicating circuit based on low speed optocoupler | |
| JPH02188020A (en) | Photocoupler circuit and the circuit for driving semiconductor element for electric power | |
| CN109450232B (en) | Drive circuit of high-order MOS pipe | |
| CN101714862A (en) | Driver for isolating edge signal | |
| CN202634310U (en) | High-speed digital input terminal circuit | |
| CN110515880B (en) | Method for improving optical coupling isolation serial communication rate | |
| CN103630857B (en) | The control device of PIN diode and nuclear magnetic resonance equipment | |
| CN110581733B (en) | Push-pull emission driver of BC-class gallium nitride MOS (metal oxide semiconductor) tube for visible light communication | |
| CN203278656U (en) | Switching power supply, and optoelectronic coupler isolation transmission circuit for digital-control switching power supply | |
| CN102073108B (en) | Optical coupler isolating circuit | |
| CN109831204B (en) | Signal isolation conversion circuit and control device | |
| CN104038203B (en) | Optocoupler communication acceleration system | |
| CN104024137A (en) | Photoelectric Switch For Elevator | |
| CN209419970U (en) | A kind of no light-coupled isolation light adjusting circuit | |
| CN105262548A (en) | Light receiving circuit | |
| CN105519270B (en) | A kind of pulse width signal amplifying circuit | |
| CN201188607Y (en) | Actinoelectricity coupling circuit for boosting of data transmission | |
| CN204836133U (en) | A optoelectronic coupler for triggering silicon controlled rectifier | |
| CN204517789U (en) | Two-forty optocoupler integrated chip | |
| CN215452912U (en) | High-speed nonlinear circuit based on optical coupler | |
| CN115987271A (en) | Optical coupling structure for realizing high-speed communication |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110105 |