This circuit was found in the August 1996 Electronics Now magazine. The circuit is based on an operational circuit whose type determines the gains and limits for the frequency.
Found in a Popular Electronics from the 90s, this circuit transforms an ordinary oscilloscope into a...
We found this circuit in a Gernsback documentation from 1960. The circuit is intended for...
The circuit below is found in the manuals of several manufacturers in the LM123 series of...