Balanced Line Driver (CB6223E)

This 600-ohm line driver was found in a 1980s documentation. The integrated circuit used is not common today.

Integrator (CB14104E)
This circuit can be implemented with other operational amplifiers. The formulas for calculating the...
Antique Mini Transistor Amplifier (CB11872E)
This circuit is from a 1953 publication, consisting of an AM radio with 3 germanium transistors that,...
Thermostat Without Relay (CB18013E)
The sensor of this circuit is a common silicon diode and it directly drives a small cooler with a...