DE2321261A1 - CIRCUIT ARRANGEMENT FOR GALVANIC DECOUPLING USING OPTICAL COUPLER WITH SPECIFIED VOLTAGE BEHAVIOR - Google Patents
CIRCUIT ARRANGEMENT FOR GALVANIC DECOUPLING USING OPTICAL COUPLER WITH SPECIFIED VOLTAGE BEHAVIORInfo
- Publication number
- DE2321261A1 DE2321261A1 DE19732321261 DE2321261A DE2321261A1 DE 2321261 A1 DE2321261 A1 DE 2321261A1 DE 19732321261 DE19732321261 DE 19732321261 DE 2321261 A DE2321261 A DE 2321261A DE 2321261 A1 DE2321261 A1 DE 2321261A1
- Authority
- DE
- Germany
- Prior art keywords
- circuit
- circuit arrangement
- arrangement according
- voltage
- output
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/20—Repeater circuits; Relay circuits
- H04L25/26—Circuits with optical sensing means, i.e. using opto-couplers for isolation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/80—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water
- H04B10/801—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water using optical interconnects, e.g. light coupled isolators, circuit board interconnections
- H04B10/802—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water using optical interconnects, e.g. light coupled isolators, circuit board interconnections for isolation, e.g. using optocouplers
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Led Devices (AREA)
Description
Schaltungsanordnung zur galvanischen Entkopplung mittels optischen Kopplers mit vorgegebenem Spannungsverhalten. Circuit arrangement for galvanic decoupling by means of optical Coupler with specified voltage behavior.
Die Erfindung betrifft eine Schaltungsanordnung zur galvanischen Entkopplung mittels optischen Kopplers bestehend aus Leuchtdiode und Fotowiderstand, wobei ein vorgegebenes Spannungsverhalten zwischen Steuerspannung und Ausgangsspannung erzielt wird.The invention relates to a circuit arrangement for galvanic decoupling by means of an optical coupler consisting of a light emitting diode and photo resistor, with a predetermined voltage behavior between control voltage and output voltage achieved will.
In derartigen Schaltungen werden galvanische Entkopplungen meist mit Transformatoren oder optischen Kopplern mit monopolarem Verhalten eingesetzt. Diese lassen sich entweder nur für Wechaelspannungen oder reinen Gleichspannungen anwenden. Eine gemischte Anwendung ist nicht möglich oder nur mit sehr hohem Aufwand realisierbar.In such circuits, galvanic decoupling is usually included Transformers or optical couplers with monopolar behavior are used. These can either only be used for alternating voltages or pure direct voltages. A mixed application is not possible or can only be implemented with a great deal of effort.
Der Erfindung liegt die Aufgabe zugrunde, eine Schaltungsanordnung zur galvanischen Entkopplung zwischen zwei elektrischen Kreisen zu erzielen in der Weise, dass sowohl im einen wie im anderen Kreis Gleich-oder Wechselspannung gesteuert werden können, die nach einem vorgegebenen Spannungsverhalten voneinander abhängig sind.The invention is based on the object of a circuit arrangement to achieve galvanic decoupling between two electrical circuits in the Way that both in one as in the other circuit direct or alternating voltage is controlled which depend on one another according to a given voltage behavior are.
Die Erfindung löst diese Aufgabe dadurch, dass zur galvanischen Sntkopplung von Eingangs-und Ausgangskreis eine Beuchtdiode und ein Fotowiderstand verwendet werden.The invention solves this problem in that for galvanic decoupling A light emitting diode and a photo resistor are used by the input and output circuit will.
Nach einer weiteren Ausgestaltung der Erfindung steigert der Fotowiderstand den Ausgangskreis nach der vorgegebenen Widerstandscharakteristik.According to a further embodiment of the invention, the photoresistor increases the output circuit according to the given resistance characteristics.
Weiterhin soll durch die Erfindung zieldie Leuchtcharakteristik der Ieuchtdiode mit der Widerstandscharakteristik des Fotowiderstands zu einer gewtlnsehten Spannungscharakteristik der Ausgangsspannung fiihren Nach einer anderen Ausgestaltung der Erfindung soll der Fotowiderstand im Basiskreis einer Transistorstufe geschaltet werden.Furthermore, the invention aims at the luminous characteristics of the Light-emitting diode with the resistance characteristics of the photoresistor to a desirable one Guide the voltage characteristics of the output voltage After a Another embodiment of the invention is the photo resistor in the base circle Transistor stage can be switched.
Ebenso kann der Fotowiderstand im Basiskreis einer bipolaren Transistorstufe wirken und dadurch Wechselspannungen steuern.The photo resistor in the base circuit of a bipolar transistor stage can also be used act and thereby control alternating voltages.
Weiterhin ermöglicht die Erfindung die Abnahme der Ausgansspannung an dem Emitterwiderstand der bipolaren Transistorstufe.The invention also enables the output voltage to be decreased at the emitter resistor of the bipolar transistor stage.
Ausserdem kann unabhängig vom Eingangskreis die Ausgangsspannung durch ein Potentiometer variiert werden.In addition, the output voltage can pass through regardless of the input circuit a potentiometer can be varied.
Die Erfindung wird anhand von in der Zeichnung dargestellten Ausführungsbeispiel näher beschrieben.The invention is based on the embodiment shown in the drawing described in more detail.
In der Zeichnung zeigt Fig. 1 die Entkopplungsschaltung mit den beiden elektrischen Kreisen.In the drawing, Fig. 1 shows the decoupling circuit with the two electrical circuits.
An die Klemmen 1 und 2 legt man die Eingangsspannung U an. Diese kann eine Gleich-oder Wechselspannung sein. Zur Strombgrenzung des Leuchtdiodenstroms dient der Widerstand 3.The input voltage U is applied to terminals 1 and 2. This can be a direct or alternating voltage. For current limitation of the LED current Resistance 3 is used.
Das emittierte Licht der Leuchtdiode4 wirkt voll auf den Fotowiderstand 5 ein. Hierzu sind beide Elemente lichtdicht in einem gemeinsamen Gehäuse untergebracht. Der Fotowiderstand 5 liegt im Basis-Kreis einer bipolaren Transistorstufe und bildet einen Spannungsteiler mit dem Widerstand 6.The light emitted by the LED4 has a full effect on the photoresistor 5 a. For this purpose, both elements are housed light-tight in a common housing. The photoresistor 5 lies in the base circle of a bipolar transistor stage and forms a voltage divider with the resistor 6.
Die bipolare Transistorstufe besteht aus den beiden Transistoren 14 und 15, den Schutzdioden 16,17,18 und 19, einem kurzschlussichernden Kollektorwiderstand 13 sowie einem gemeinsamen Emitterwiderstand 20. Soll die Ausgangsspannung zusätzlich einstellbar sein, so ist der Widerstand 20 ein Potentiometer. Die beiden Zenerdioden 11 und 12 dienen zur Erzeugung einer festen Schwellspannung, Widerstand 21 zur Beeinflussung der Potentiometercharakteristik 20.The bipolar transistor stage consists of the two transistors 14 and 15, the protective diodes 16, 17, 18 and 19, a short-circuit-protecting collector resistor 13 and a common emitter resistor 20. Should also be the output voltage be adjustable, the resistor 20 is a potentiometer. The two zener diodes 11 and 12 are used to generate a fixed threshold voltage, resistor 21 for influencing the potentiometer characteristic 20.
Die Speisung der bipolaren Transistorstufe erfolgt an den Klemmen 7 und 8. Hierzu kann man eine Gleichspannung oder eine z.B. rechteckförmige Wechselspannung verwenden.The bipolar transistor stage is fed at the terminals 7 and 8. A direct voltage or, for example, a square-wave alternating voltage can be used for this use.
An den Klemmen 22 und 23 kann die Ausgangsspannung U2 abgenommen werden.The output voltage U2 can be taken from terminals 22 and 23.
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19732321261 DE2321261A1 (en) | 1973-04-27 | 1973-04-27 | CIRCUIT ARRANGEMENT FOR GALVANIC DECOUPLING USING OPTICAL COUPLER WITH SPECIFIED VOLTAGE BEHAVIOR |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19732321261 DE2321261A1 (en) | 1973-04-27 | 1973-04-27 | CIRCUIT ARRANGEMENT FOR GALVANIC DECOUPLING USING OPTICAL COUPLER WITH SPECIFIED VOLTAGE BEHAVIOR |
Publications (1)
Publication Number | Publication Date |
---|---|
DE2321261A1 true DE2321261A1 (en) | 1974-11-07 |
Family
ID=5879386
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19732321261 Pending DE2321261A1 (en) | 1973-04-27 | 1973-04-27 | CIRCUIT ARRANGEMENT FOR GALVANIC DECOUPLING USING OPTICAL COUPLER WITH SPECIFIED VOLTAGE BEHAVIOR |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE2321261A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2749455A1 (en) * | 1976-11-04 | 1978-05-11 | Electronics Corp America | PHOTODETECTOR |
DE3142923A1 (en) * | 1981-10-29 | 1983-06-01 | AEG-Telefunken Nachrichtentechnik GmbH, 7150 Backnang | Integrated services optical transmission system |
DE3142924A1 (en) * | 1981-10-29 | 1983-06-01 | AEG-Telefunken Nachrichtentechnik GmbH, 7150 Backnang | Integrated services optical transmission system with restricted transmission bandwidth in the event of power failure |
DE4029399A1 (en) * | 1990-09-17 | 1992-03-19 | Eickhoff Geb | Opto-coupler for digital signal transmission - uses control stage for counter-phase control of parallel elements |
-
1973
- 1973-04-27 DE DE19732321261 patent/DE2321261A1/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2749455A1 (en) * | 1976-11-04 | 1978-05-11 | Electronics Corp America | PHOTODETECTOR |
DE3142923A1 (en) * | 1981-10-29 | 1983-06-01 | AEG-Telefunken Nachrichtentechnik GmbH, 7150 Backnang | Integrated services optical transmission system |
DE3142924A1 (en) * | 1981-10-29 | 1983-06-01 | AEG-Telefunken Nachrichtentechnik GmbH, 7150 Backnang | Integrated services optical transmission system with restricted transmission bandwidth in the event of power failure |
DE4029399A1 (en) * | 1990-09-17 | 1992-03-19 | Eickhoff Geb | Opto-coupler for digital signal transmission - uses control stage for counter-phase control of parallel elements |
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Legal Events
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OHJ | Non-payment of the annual fee |