Third Order Low Pass Filter (CB25264E)

This circuit was found in the December 1990 issue of Radio Electronics magazine. It was used in a home theater sound system.

Negative Pulse Detector (CB14835E)
This circuit trips when a negative pulse is applied to its input or when the voltage drops below a...
Developing Table For Silk Screen (CB4445E)
This is an old 1988 circuit consisting of a timer or time control for exposing silk-screen arrays. The...
Triangular and square signal generator (CB21448E)
This circuit was taken from an old American documentation. It can be built with modern op amps. The...