This circuit for cars of the time was found in a Popular Electronics magazine from the 90s. The circuit is based on CMOS logic that is common even today.
This VCA was found in the July 1988 issue of Radio Electronics magazine. It uses an OTA op amp and...
This configurable CMOS configuration for frequencies up to a few megahertz was obtained in an...
The purpose of this 2005 circuit is to demonstrate in a very simple way the principle of operation of a...