Variable gain amplifier (CB8101E)

Found in an Electronics Now from the 90s, this circuit uses components that are still common. The LM3900 is a transconductance operational amplifier.

| Clique na imagem para ampliar |

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...