Found in an Elektor from the 90s, this circuit is suitable for viewing audio signals on an oscilloscope. The operational amplifier admits equivalent.
This remote control receiver via the power grid appears elsewhere on this site from other sources....
May 2017 - Torex's XBP14E5UFN, an array of TVS circuit protection diodes with only 0.8 pF of...
This circuit was suggested by Electronic Engineering in a 1980s publication. The circuit makes use...