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Optocouplers for audio applications

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xirix

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Does anybody experimented usual optocouplers in audio applications?
I'm considering direct transfer of audio signal through optocouplers, not special techniques (modulations).
I don't want to use special linear optocouplers.
Any suggestion will be wellcomed.
Thanks
 

Moss

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General approach is to use two identical optocouplers. One in forward path, and one in feedback, Thus providing compensation for nonlineap amplitude response.
 

aNdreiBuuu

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Hi,
You have 2 options:
1. as Moss said use 2 identical optocouplers (in same package)
2. use FM modulation for audio isolation.

The common way is to use the 1'st option. If you're searching on HP web site you'll find a good essay regarding optocoupler compensation for nonlinear amplitude response.

Hope this help,
//a
 

IanP

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I think that for isolation of a baseband audio signal you don't have any other option than linear..
You not only need good frequency response but also amplitude .. and standard opto-couplers have been designed for DIOs, ie. 0 or 1.
Besides, linear optocouplers are not that expensive..
 

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