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.
Based on an integrated circuit CA31062 which consists of a photosensor, this circuit was obtained from...
This circuit was obtained in the publication 101 Electronics Projects of 1979. The circuit can be...
April 2017 - Mouser Electronics already has the MAX4007 from Maxim Integrated in its inventory, an...