This circuit appeared in the September 1973 issue of Radio Electronics magazine and was recommended for a synthesizer project. The circuit is for audio signals and has control inputs.
This circuit was obtained from an American 80's documentation. The balanced mixer can be shown in...
This circuit was found in a 90s Electronic Engineering. The quadruple operational amplifier can be...
I found this circuit in an English publication from 1989. This configuration can be mounted with...