This preamplifier for phonographic capsules using FET was found in 90s American documentation. Consumption is very low. The power can be obtained from the amplifier circuit with which it works.
Found in a 1964 Electronic Design, this circuit generates 1 A pulses with durations from 100 us to...
This low-current control circuit has a lamp as a load, but can have other types of devices, such...
This circuit was found in an old American optoelectronics manual. The circuit makes use of an...