This adjustable circuit from 0 to 200 nA was found in a 90's EDN. The components can still be found relatively easily, as they are CMOS.
This fraction watt amplifier uses transistors that are still quite common in our market. The power...
The circuit shown in the figure is characterized by the existence of a current limiter based on...
In the figure we have the power supply for the 8 W amplifier in the previous circuit. The circuit...