This circuit provides a 5 V negative output with a maximum current of 1 A. The circuit is from the 1993 Linear Technology Applications and uses common components at the time.
The operational amplifier of this low current source may be any of the JFET type. The output...
In the figure we have a simple signal tracer circuit to be coupled to the volume control of an AM...
The operational amplifier is old. The circuit is from an 80's documentation but can be designed...