This circuit was found in a Radio Electronics magazine from November 1972. The circuit is based on an integrated circuit of the time and the current is 1 A and is adjusted with a potentiometer.
We found this circuit in the Linear Applications Handbook of the National Semiconductor of 1994....
This circuit was obtained from a 90sLinear Technology documentation. It is a current source that...
This is a possible circuit for the receiver of the previous circuit. Other circuits can be found...