This circuit allows the use of an electret microphone with a 1.5 V source. We found it in the Encyclopedia of Electronic Circuits volume 5 from 1995.
The configuration presented below was obtained in the Linear Application Handbook of the National...
This circuit was found in December 1983 Radio Electronics magazine. The maximum output current is 1 A...
This untuned circuit uses one of the world's first commercial transistors, the CK722, having been...