This 1 kHz filter was found in the March 1997 issue of Electronics Now magazine. The circuit is applicable to any operational amplifier with a dual power source.
This circuit, obtained in an old publication, causes a second telephone bell to be played in a...
This circuit is from the 1982 SGS Linear Circuits Manual. The circuit provides currents from 35 mA...
This circuit generates pulses of up to 60 seconds with a short reset time. The circuit is from an...