This circuit is placed between the instrument pickup and the amplifier input. The same version can be found from other sources in this section. This is from an English magazine from the 80s.
Found in National Semiconductor documentation from the 1980s, this circuit can be implemented with...
This circuit was found in a 1968 EEE. The circuit makes use of logic gates of the time and can be...
We found this circuit in a publication on operational amplifiers from 1978. The circuit is made...