Medium impedance stage (CB20563E)

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

3A Power Operational Amplifier L165 (CB15138E)
The presented circuit has a voltage gain of 10 times. We find it in the SGS manual of integrated...
12V double regulator (CB8810E)
We found this circuit in a 1966’s General Electric documentation. The circuit uses diodes in...
5 W Darlington Amplifier (CB6177E)
We found this circuit in a 1969 General Electric documentation. The circuit uses transistors of the...