This circuit with automatic gain control was found in the July 1988 issue of Radio Electronics magazine. The circuit is based on a transconductance operational amplifier.
This circuit can drive a loudspeaker with near 1 W of Power from 6 to 9 V supplies. The circuit...
June 2017 - NXP's new 4 Mbit capacity NXH5194 memories are available from Mouser Electronics...
This circuit was found in a 1987 magazine. It measures the pulse rate produced by a cardiac...