This circuit provides a logic output signal when the voltage exceeds a certain value. The circuit is from the 1994 Linear Applications Handbook by National Semiconductor.
This circuit for audio signals was found in the March 1990 Radio Electronics magazine. The circuit...
The operational amplifiers used in this circuit are old. The circuit is from documentation of the 70's, but...
This circuit was obtained in the publication 101 Electronics Projects of 1979. The circuit can be...