This circuit that appears in several versions in this section and on this website was found in documentation from the 1980s. The transistors can be of any general purpose NPN type like the BC548.
This circuit is from the 1982 SGS Linear Circuits Manual. The circuit provides currents from 35 mA...
The integrated circuit used in this 1987 project is not very common these days. However, if found...
Taking advantage of the high input impedance of the operational amplifier 741 and its high gain, we...