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G15396 - Audio Opto Coupler
https://www.goldmine-elec-products.com/prodinfo.asp?number=G15396
Audio Opto Coupler. Tiny audio optocoupler is about the size of a pencil eraser and has 4 leads. These are used extensively in audio compressors, audio level controls, audio limiters, expanders/noise gates, guitar tremolo effects, guitar amplifiers …
Audio level control with resistive optocouplers.
https://tortugaaudio.com/documents/docs/Silonex%20Optocouplers%20Application%20Notes.pdf
audio signals, the demands on the optocoupler are rather different, since it is being used as a variable resistance rather than being hard ON or OFF. Audiohm optocouplers offer a unique feature set when considering the problem of controlling audio signal levels. The main features are: 1. Very high isolation between control port and audio circuit. 2.
Audio Optocouplers - Learn About Electronics
https://www.learnabout-electronics.org/Semiconductors/opto_53.php
In audio systems isolation between inputs and higher voltage/current equipment is usually provided by audio transformers, however it is also possible to use specialised audio optocouplers such as the IL300, which uses an infra red LED to illuminate one photodiode as an output device and a second photodiode to provide feedback, ensuring improved linearity and wider frequency …
Compre ssor Applications for Resistive Optocouplers
https://www.advancedphotonix.com/wp-content/uploads/2016/08/Compressor-Applications-for-Resistive-OptoCouplers.pdf
Resistive Optocouplers An audio compressor serves to reduce (or compress) the dynamic range of the input signal. This keeps the level more constant, so that it will be clearly heard above background sounds, whether they be noise or accompanying musical sounds. An ideal compr essor introduces little distortion and noise when it is inactive,
operational amplifier - Current limiting with optocoupler ...
https://electronics.stackexchange.com/questions/373142/current-limiting-with-optocoupler
The OPA548 operational amplifier provides adjustable current limit that can be controlled digitally with a current-out DAC. Below is a circuit from the datasheet. I've calculated that Iset current 0~6.7µA will give me desired output range 0~100mA. However, OPA548 is powered by isolated ±25V DC-DC.
Audio-Optical Isolation Amp - audioXpress
https://audioxpress.com/article/Audio-Optical-Isolation-Amp
Ordinary audio levels: 775mV eff Maximum audio levels: 1V eff (in and out) Connectors: Stereo input and output Commercial phono-socket (transformer-fitted circuit) PCB mounting terminal block (for retrofitting) Gain: 0dB Frequency response: 20Hz…30kHz, practically linear Distortion: 0.05% @ 1kHz, 775mV eff Power on indicator: LED (first solution)
Current Limiter Circuits for Opto-Coupler LEDs
https://www.bristolwatch.com/ele3/1f.htm
LM334 used as a current limiter for optocoupler LED input. The formula is simple with the Ref. at 0.064V / Rset. In this case 0.o64 divided by 3.3 Ohms = ~19mA. 19mA will operate any opto-coupler I have. If more current is needed replace Rset with 2.7 Ohms for 24mA or even 1 Ohm for 64mA. Most LED input are limited to 60mA.
Audio Optocoupler? - All About Circuits
https://forum.allaboutcircuits.com/threads/audio-optocoupler.102434/
Optocouplers can be a bit slow - maybe even for audio frequencies, so worth checking that detail on the data sheet before going ahead. Photo diode couplers are faster than photo transistor ones. If all you need is speech bandwidth, you shouldn't have much trouble. AnalogKid Joined Aug 1, 2013 9,484 Oct 16, 2014 #11
Optocoupler or Optoisolator for Audio | Forum for Electronics
https://www.edaboard.com/threads/optocoupler-or-optoisolator-for-audio.58629/
audio opto isolator Hi, We have two channel audio to be seperated from the final stage audio amplifier. Now becase of different products the final power ampifier keeps on changing and we come across gounding loop/ humming noise. I know that optocoupler could be used to eliminate this. Does any one knows any good one for audio (analog). I am ...
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