This circuit uses a feedback integrator. We found it in Ferranti's transistor manual from 1974. Transistors are general-purpose types at the time.
This circuit was developed to test suspect 4001 and 4011 integrated circuits. The circuit is from...
The power source shown for powering for small TTL circuits was found on a Radio Electronics...
This circuit was found in a Popular Electronics from April 1993. It is a voltage regulator circuit...