Half Wave Fast Rectifier (CB5160E)

This 80's circuit can be made with current comparators. Rectification accuracy is 1% DC up to 100 kHz.

Turn On Switch Using a SCR (CB542E)
This circuit can turn-on (only) a load (relay or lamp) when S1 is pressed. The circuit can be used as...
Low frequency multiplier (CB8239E)
This circuit was found in a 90s Electronic Design. The integrated circuits are from that time....
Sound Effects (CB26015E)
Found in the May 1997 issue of Electronics Now, this circuit produces a variety of sound effects for...