This circuit was found in a 1964 documentation. It shows how to achieve automatic gain control for an oscillator. The transistors are of the time and the circuit controls signals from 2.6 to 3.1 kHz.
This simple circuit serves to demonstrate the working principle of a Set-Reset flip-flop (S-R or...
This circuit is from the 80's, using an integrated of the time. The circuit serves as a reference,...
This circuit was obtained from the Linear Technology 2005 Application Manual. The circuit sensing...