This 1969 Mullar circuit appears elsewhere on this site. The circuit uses germanium diodes and the indicator is microammeter with zero in the center of the scale.
Suggested by a 90s Electronic Design, this circuit drains only 0.25 mA from its source. Listening...
The crystal frequency of this circuit found in an American documentation is limited only by the...
This current sensor employs the Texas Instruments LMV358A low voltage operational amplifier. This...