Found in a 1968 US documentation, this circuit shows how to use the resistance-scale multimeter to analyze the dwell angle of old platinum cars.
The idea of this circuit is to obtain a resistance of 10G ohms using an operational amplifier....
This circuit was taken from a Popular Electronics from the 90's. The power step can be changed to...
The figure shows how to use an operational amplifier with a low impedance head. The gain is...