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fjpompeo 14th January 2008 04:32 PM

Opto FET compressor/limiter
I need a schematic of an audio compressor/limiter that uses a FET optocoupler like H11F1M used to control an automatic voltage amplifier or automaitc gain control. This will be used as a mic preamplifier.



jan.didden 14th January 2008 07:36 PM

There are several apps at THAT corporation's site.

Jan Didden

cuibono 14th January 2008 08:43 PM

also look up prodigy-pro forum:

dmfraser 17th January 2008 07:15 PM

I found I could not get acceptable sound quality from FET limiters and switched to opto resistive ones several years ago. Using Vactec devices. THD in hard limiting dropped from the 0.2% range down to the .01% range. And even to get the 0.2% range with FETs took tricks that are considered proprietary.

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