This trimmer or reaper amplifier cuts the signal peaks at a voltage determined by the zener diodes. The gain is given by R1 and R1 and the power supply must be symmetrical from 5 to 15 V.
This small phonographic amplifier was found in a 1967 General Electric documentation. The...
I discovered this circuit in Radio Electronics magazine in 1962. The circuit drives a special...
This circuit was found in the power semiconductor manual of the 1980s ON Semiconductor. The...