Transistor breakdown (CB21393E)

This inverse transistor breakdown circuit was found in a 1967 documentation. It applies to modern components.

Adjustable High Q Notch Filter (CB15815E)
We can implement this filter with more modern equivalent operational amplifiers, since the LM110 is...
Voltage to Current Converter for LEDs (CB21623E)
This common transistor-based circuit provides power for 20 mA common white LEDs from a single 1.5...
Fourth order low pass Sallen Key filter (CB6940E)
This filter was obtained from Radio Electronics from the 80's. The configuration applies to any...