3 V buffer (CB7142E)

This 3 V rail to rail buffer was found in a National Semiconductor documentation. The gain is unit.

Basic Trigger (CB21462E)
This basic Schmitt trigger was found in an American publication from 1968. The circuit uses...
50 ohm Cable Driver (CB6137E)
This circuit is from an American 1964 documentation. Transistors of the time are used, but modern...
Ultra Simple Intercom (CB16486E)
This simple circuit uses small speakers for both listening and speaking (microphone). The feeding is...