This circuit is from a 1969 EEE magazine. The transistors are from that time, but the circuit can be implemented with modern equivalents, such as 2N2646 for Q3.
Found in an EDN from the 80's, this circuit makes use of an operational one of the time. The...
This circuit is from the 80's, using an integrated of the time. The circuit serves as a reference,...
The circuit presented is from the Linear Applications Handbook of the National Semiconductor of...