Capacitance multiplier (CB7803E)

We found this circuit in an old Popular Electronics. The circuit can be applied to other operational amplifiers.

Push Pull Output Amplifier (CB950E)
This old configuration of an audio amplifier has a push-pull two-transistor output stage. Output...
Astable Multivibrator (MSB016E)
This is the traditional configuration of na Astable Multivibrator using two NPN ttransistor....
Economic Ammeter (CB16606E)
This circuit is from 1987 documentation. The operating system used is not common today, but two...