This two-tone decoder has a bandwidth of 24%. The circuit is from a 1994 Electronics Now. The components without the value determine the recognized frequency.
This relay shield was found in the October 1993 Electronics Now magazine. The circuit is powered by...
The circuit shown was found in Intersil documentation from the 90s. The formula allows to...
We present a comparator with signal resolution in the submicrovolt range. The matched pair of...