This circuit was found in a 1969 US documentation. It provides a signal that can be externally programmed as suggested circuits. The circuit can be used as a shield.
Other series amplifiers such as the MC3301, MC3401 and LM2900 can be used on this circuit. We...
This circuit was found in the December 1982 Radio Electronics magazine. The components are of...
Found in documentation from Analog Devices from the 90s, this amplifier uses a component from the...