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| Keywords: Vactrol VCA (Silonex).PNG en Linear control law VCA with vactrols as remote-control pots <br> Based on schematic in http //www silonex com/audiohm/levelcontrol html Audio level control with resistive optocouplers http //www silonex com/audiohm/pdf/levelcontrol pdf PDF version Retrieved November 2 2010 p 6 <br>Drawn in Proteus v 4 <br> Circuit modified to show explicitly different audio and control grounds and compartmentalized into audio control and remote control blocks <br> Underlying schematic PD 1970s art if ever patented <br> Note that if the inputs of OA2 allow rail-to-rail operation the control circuit can be easily adjusted to run off a single power supply which could be as low as +5V all it needs is to drive a LED The same PS rail can act as Vref setting the scale for Vc control voltage Vref does not even need to be regulated as only Vc/Vref ratio is important own East of Borschov 2010-11 ÐŸÑ ÐµÑ†Ð¸Ð·Ð¸Ð¾Ð½Ð½Ñ‹Ð¹ УУРна Ð¾Ð¿Ñ‚Ð¾Ð¿Ð°Ñ Ð°Ñ… PNG Vactrol | ||||
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