The presented circuit measures currents and voltages with precision that depends on the tolerance of the resistors used. The instrument is a microammeter and more scales can be added.
This circuit from an old Argentine publication shows how it is possible to use a tunnel diode in a...
Found in documentation from the 90's, this circuit has a narrow pass band around 1 kHz. The...
With this circuit it is possible to obtain an input resistance of 100Gohms for a multimeter, with...