This dual balanced modulator configuration was obtained in a 1980s telecommunications documentation. The circuit makes use of transformers and the diodes are commonly used.
An interesting application of the 4093 integrated circuit is the one shown in the figure, in which...
Published in Popular Electronics with the curious name of Obnoxious Noisemaker, this 1968 circuit...
This circuit consists of a simple continuity test with two transistors forming a relaxation...