We found this circuit in a 1976 documentation. The FET can be BF245 or MPF102 and the power supply need not be symmetrical. The FET in the feedback acts as an automatic gain control.
n be assembled with BC558 transistors for low power transistors and a BD136 for the output. The...
We found this circuit in the 1994 Linear Applications Handbook from National Semiconductor. The...
It is an ideal assembly to be implemented as work by students of digital electronics courses, as...