This circuit was found in Raytheon's 1967 documentation. The circuit uses an operating of the era, but the configuration can be applied to modern operational amplifiers.
We find this circuit in an American 1980s documentation. It triggers an alarm in the event of a...
This circuit can be powered by voltages from 3 to 9 V providing output power from 100 mW to 1 W....
May 19, 2015 - Mouser Electronics, Inc., the global authorized distributor with the newest...