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 circuit in a receiver that allows the capture of distant stations with short waves. The...
We find this filter with three operational of the time in an American documentation of the 80s....
This FM receiver tuning step circuit was found in a 1960 documentation. No information about the...