Originally designed for WWV (Standard Time Station) signals, it lets 1 kHz tones pass by rejecting the 440 and 600 Hz tones emitted by the station. The circuit is from a 1964 Electronic Design.
This common configuration source was obtained from old documentation, so the components can be...
This third-order filter was found in a 1975 publication. The circuit must be powered by a...
This circuit is basically the same configuration as the previous one with a power stage with...