Found in American documentation from the 1980s, this circuit has a diode feedback. At the exit we have an indicator LED. The LM3900 is a transconductance operational amplifier.
This circuit appears with variations in other points of this section. This version is from...
With this circuit general purpose diodes and rectifiers can be tested with ease R has 100 ohm for...
The INA185 integrated circuit from Texas Instruments is a current sensor that can operate with...