Source: http://www.next.gr/audio/amplifiers/voltage-controlled-variable-gain-amplifier-ii-l12486.html
Hey guys/gals, I found a schematic for a VCA (Voltage controlled amp) online. It uses a FET to very the gain with V- (Gain control pin) This could be a simple solution for what I'm looking for. I wrote in some of my math off to the right, I'm not sure if it's actually doing what I says it's doing. It seems to me more like an offset then anything, my cct analysis is a little rusty so if anyone want's to chime in that would be cool
"k" would be a constant of the FET, I mostly ignored polarities as I'm concerned with magnitudes.
Thanks
Hey guys/gals, I found a schematic for a VCA (Voltage controlled amp) online. It uses a FET to very the gain with V- (Gain control pin) This could be a simple solution for what I'm looking for. I wrote in some of my math off to the right, I'm not sure if it's actually doing what I says it's doing. It seems to me more like an offset then anything, my cct analysis is a little rusty so if anyone want's to chime in that would be cool
"k" would be a constant of the FET, I mostly ignored polarities as I'm concerned with magnitudes.
Thanks