This circuit was found in Mullard's 1960s transistor manual. The circuit employs contemporary germanium transistors and operates at 1.65 kHz.
This circuit is from 2001 documentation, serving to multiplex stereo signals for FM transmitters. The...
This circuit reverses the signal if both positive and negative. We found it in an American...
Found in a publication by Gernsback from 1960, this circuit makes use of germanium transistors of the time....