We found this circuit in the March 1992 issue of Radio Electronics magazine. The circuit uses an external reference that can be changed.
This 80s signal follower makes use of an audio amplifier of the era. The circuit can be adapted to...
This circuit may be modulated by a very low frequency signal, for example to obtain the vibrato...
We find this circuit in an American manual from the 80's. The circuit can be implemented with more...