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 uses a quadruple operational amplifier of the time. The circuit is from the 70s but...
This circuit consists of a negative ionizer for use in the car. The circuit has a high voltage...
September 2016 – At Mouser Electronics is available audio drivers for the purpose of suitable...