This operational amplifier circuit with variable gain was obtained in an 80's Electronic Engineering. The circuit applies to other operational amplifiers.
This monostable circuit appeared in Radio Electronics magazine in October 1965. The circuit...
The presented circuit produces the sound of a fireman's siren. In place of the output transformer with...
The circuit shown in the figure was suggested by Maxim (www.maxim-ic.com) based on the DS2786B...