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.
This circuit for analog video signals was found in old American documentation. The transistor...
This circuit was suggested by Motorola in 1980s documentation. The circuit employs an operational of...
This circuit is from an American cookbook from 1977. The circuit generates a voltage of...