Keywords: Vactrol basic attenuators.PNG Three basic voltage divider circuits employing vactrols photoresitor or photocell optocouplers Series Shunt Series-shunt own For an analysis of performance see for example Silonex 2002 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 Retrieved November 12 2010 2010-11 East of Borschov <span class signature-talk >talk</span> Public domain Vactrol |