The integrated circuit used is uncommon today. The circuit was obtained in the Philips integrated circuits manual of 1990. The reference voltage-range is from 0.5 to 9.0 V.
This interesting bandpass filter using an operational amplifier 741 has its cutoff frequency...
January 2017 - Mouser Electronics is announcing the availability of the new OptoMOS® CPC1010N...
This circuit was obtained in the Audio Handbook of the National Semiconductor of 1977. The...