This circuit is from a 1990s publication by William Sheets. The circuit consists of a stage whose gain is adjusted according to the signal intensity.
The commercial MT2B receiver manufactured in Japan in the 1960s had a listening device only and...
This is one of the many integrated integrator circuits that the reader can find on the website. The...
This first order Butterworth filter is tuned to frequencies around 1 kHz. The frequency is given...