The purpose of this circuit is to limit the noise of an audio signal. Diodes are made of germanium. The circuit is from an old American manual.
The base of this circuit is 1/4 of an integrated circuit 4136 which consists of a quadruple 741....
This circuit has a common configuration widely used in projects on this site. The transistor is...
This circuit appears elsewhere in this section and on this site. The circuit generates a linear...