Complementary symmetry stage (CB22237E)

We found this step in an old documentation. The transistors are of the time and the power supply symmetrical.

Noise Bridges (CB25045E)
This circuit can be used as a noise canceller for communication receivers or even common ones. The...
Narrowband Audio Filter (CB20085E)
We found this circuit in an old American publication from the 1980s. Transistors can be...
Voltage Controlled Amplifier (CB24285E)
This circuit is part of a synthesizer that was published in parts in several issues of Radio...