This circuit is from a 1968 Electronic Design. The characteristics of the output transformer are not given and the transistors are of the time. The circuit provides a power of a few watts.
May 2017 - Panasonic's new APS1 series of optical couplers with 3 750 V insulation and up to 50...
Found in an EDN from the 90s, this circuit uses an electret microphone. The output can be used to...
The purpose of this circuit, found in a 1994 documentation, is to provide resources for testing...