This circuit was originally intended for reading movie soundtracks. The circuit is from 1967 and was found in an English publication. The sensor is semiconductor type.
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...