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.
This circuit is suitable for applications such as a TTL log digital link. Maximum frequency is...
This circuit was used in an alarm published in the July 1970 Radio Electronics magazine. The...
We found this circuit in a 1990 documentation. It works with the power of the digital circuit...