The circuit shown is from 1994 National Semiconductor documentation but can be implemented with more modern operational amplifiers. The power supply must be symmetrical.
Common diodes when forward biased present a voltage fall of about 0.6 to 0.7 V. This voltage fall...
This simple circuit was found in an English magazine that no longer exists, January 1970 issue. This...
The 60 Hz hum or noise from the power grid (hum, in English) is one of the biggest enemies of...