This circuit with 24 dB per octave attenuation was found in the November 1973 Radio Electronics magazine. The components are for 1 kHz but can be recalculated for other frequencies.
This circuit was found in old publication from 1958. The circuit uses germanium transistor, common in...
This circuit was found in an English publication from 1989. The integrated circuits are of the...
August 2017 - Texas Instruments' new integrated circuit BQ25872, a 7-A keyed battery charger with...