This circuit is from a 1968 documentation using one of the first integrated circuits available at the time, the TAA370. The circuit is powered by 1.3 V using a 200 ohm handset.
This small power supply for low currents (5mA) is suitable for power low-power TTL experimental circuits....
The basic idea of this circuit is to indicate the tolerance of a capacitor by reference to a...
This circuit was found in a Electronics Handbook (1989). The shown amplifier provides a few...