Additional Pull Pull (CB6119E)

This stage was found in a 1964 Electronic Design. The transistors are of the time and the shape of the signal obtained is shown in the diagram.

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Active Audio Filter (CB12228E)
This circuit compensates for losses in pre-amplified audio or tone control stages. The circuit can use...
Simple Alarm (CB26246E)
Found in the Encyclopedia of Electronic Circuits volume 5 from 1995, this circuit uses a...
Resistance Bridge (CB3911E)
This is a bridge for the measurement of low value resistances and high values too. The circuit...