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Opto-isolator - Wikipedia
https://en.wikipedia.org/wiki/Opto-isolator#:~:text=An%20opto-isolator%20%28also%20called%20an%20optocoupler%2C%20photocoupler%2C%20or,voltages%20from%20affecting%20the%20system%20receiving%20the%20signal.
Audio Optocouplers - Learn About Electronics
https://www.learnabout-electronics.org/Semiconductors/opto_53.php
Method 1. Basic Audio Optocoupler. The circuit shown in Fig. 5.3.4, adapted from a design in Newnes Electronic Circuits Pocket Book by Ray Marston (ISBN 10:1-4832-9192-8) uses the 4N25 connected as a phototransistor to pass audio signals whilst isolating the input and output circuits. An LM324 op amp is used here to drive the LED input of the 4N25. R1 and R2 form a …
Audio-Optical Isolation Amp - audioXpress
https://audioxpress.com/article/Audio-Optical-Isolation-Amp
Audio-Optical Isolation Amp. August 20 2015, 05:00. When we connect audio components, interference may occur from various power and signal grounds. This circuit enables the full galvanic isolation of sound frequency signals with optical transmission in excellent quality, eliminating interference. This article was originally published in audioXpress October …
Audio Isolation With Standard Optical Isolator ...
https://www.electro-tech-online.com/articles/audio-isolation-with-standard-optical-isolator.739/
Audio Isolation With Standard Optical Isolator 2015-06-10. Audio Isolation With Standard Optical Isolator. 2015-06-10. There are special purpose (and relatively expensive) optical isolators available with separate feedback connections designed for high analog linearity and fidelity but, for non-critical AC applications, a standard opto isolator may be adequate if it …
Optocoupler Circuits | Nuts & Volts Magazine
https://www.nutsvolts.com/magazine/article/optocoupler-circuits
Major points to note about the Figure 2 optocoupler are that its output current is controlled by its input current, that a control circuit connected to its input can be electrically fully isolated from the output circuit, and that — since the input controls the output via a purely optical link — potential differences of hundreds of volts can safely exist between the input and output circuits. This …
opto isolator - Audio soft mute using optically isolated ...
https://electronics.stackexchange.com/questions/325777/audio-soft-mute-using-optically-isolated-mosfet
The LED inside the photocoupler has a max forward voltage of 1.3V so with the resistor it gets about 10mA. This is a typical output stage of a device that is connected to the input of a high Z amplifier. The relay in the system shorts the input to the output so the entire device is bypassed. This creates a noise. mosfet opto-isolator switching
Optocoupler or Optoisolator for Audio | Forum for Electronics
https://www.edaboard.com/threads/optocoupler-or-optoisolator-for-audio.58629/
audio opto-isolator Thanks I actually read that. But didnt find a good one yet with a good linearity. Ageing still seems to be an issue.I was wondering if there is any other techniue to acheive audio isolation. Transformer isolation doesnt seem attractive because it takes too much space and may be cost.
Audio Optocoupler? - All About Circuits
https://forum.allaboutcircuits.com/threads/audio-optocoupler.102434/
I have seen some cool circuits that utilize dual opto couplers, the second one is included in the feedback loop to linearize the the transfer function of the whole setup. Basically the circuits have both LED's in series, one coupler is included in the local feedback loop and the other has identical circuitry across the isolation barrier.
Optocouplers - Homemade Circuit Projects
https://www.homemade-circuits.com/optocouplers-working-characteristics-interfacing-application-circuits/
Optocouplers – Working, Characteristics, Interfacing, Application Circuits. OPTOCOUPLERS OR OPTOISOLATORS are devices that enable efficient transmission of DC signal and other data across two circuit stages, and also simultaneously maintain an excellent level of electrical isolation between them. Optocouplers become specifically useful where an electrical …
Linear DC Signal Opto-Isolator / Optocoupler Circuit
https://www.electroschematics.com/linear-dc-signal-opto-isolator/
Linear DC Signal Opto Isolator Jim Keith This simple circuit provides better than 1% accuracy in optically coupling a DC voltage signal. To compensate for the non-linearity of the optical isolator, an identical device is connected in the feedback loop. To further enhance stability, both optical isolators are located inside the same IC.
PC817 Opto Isolator Optocoupler IC- SMD
https://electrobes.com/product/pc817-opto-isolator-optocoupler-ic-smd/
PC817 is your standard optocoupler. Use this IC to isolate two parts of a circuit. Isolation prevents ground loops and prevents trasmission of unwanted noise.Input LED has a forward voltage of 1.2V and a forward crrent fof 50mA.
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