This VCA was found in the July 1988 issue of Radio Electronics magazine. It uses an OTA op amp and has its gain adjusted by the voltage at the gain input.
This circuit is from a 2005 Linear Technology manual. The circuit uses an LT6700-3 and has an...
This circuit shows how to use a low current read switch to control high power loads. The circuit...
The purpose of this circuit is to pass an audio signal from one channel to another in a...