High impedance stage (CB20564E)

This high input impedance amplifier stage was found in a 1963 documentation. The transistor germanium of the time.

Expanded-range voltmeter with LM3914 (CB25453E)
This circuit with different colored indicator LEDs has an expanded scale. We found it in the March...
Circuit Breaker with the LTC4213 (CB5900E)
This circuit was found in a 2005 Linear Technology documentation. The circuit is based on LTC4213...
Surround Amplifier (CB25265E)
This circuit is from a Radio Electronics from December 1990. The circuit was used in a home...