Mini amplifier (CB21697E)

The indicated fraction watt amplifier has good gain, requiring only 100 mV input for full power excitation.

Missing Pulse Detector (CB15633E)
The absence of a pulse in the pulse train applied to the input of this circuit causes a high level...
Proximity switch (CB22211E)
This proximity sensor was found in old documentation. The transistors can be BC548 or BC558 for...
Audio Expander (CB25560E)
This circuit is based on the TDA3810N. We found it in the March 1992 issue of Radio Electronics magazine....