Medium impedance stage (CB20563E)

We found this circuit in an English publication from 1963. The circuit uses germanium transistors of the time.

Transistor Tester (CB10831E)
This circuit was obtained in the publication 101 Electronics Projects of 1979. The circuit can be...
High Input Impedance Differential Amplifier MC34072 (CB14485E)
We found this circuit in Motorola's Linear Databook in 1990. The circuit has high input impedance, and...
Semi-isolated Colpitts Oscillator (CB25554E)
This circuit was found in the February 1993 issue of Radio Electronics magazine. Some components depend...