Using a MAX644 this circuit was found in the April 1989 issue of Radio Electronics magazine. The circuit is for a 5 V voltage and 50 mA current output.
This circuit was obtained in an old documentation, but it is still current by the used components....
We found this circuit in a 90's European schematic. The circuit can be implemented with almost any...
Found in an American documentation from the 90s, this sophisticated circuit is suitable for...