Found in 80's Electronic Engineering, this circuit can tune the frequency to be rejected. The power supply must be symmetrical.
July 2017 - The new TC6321 integrated circuit consisting of a pair of transistor MOSFET...
This circuit is from a 1967 RCA documentation. Components can be replaced with modern equivalents. The...
Found in an Electronic Design from the 90s, this circuit uses high voltage operationals of the...