A multiplex decoder circuit (Machine-translation by Google Translate, not legally binding)

摘要

A multiplex decoder circuit for stereophonic receiver systems with frequency modulation comprising a signal input circuit for connection to a frequency modulation receiver for receiving pre-calibrated subcarrier sideband signals from it modulated according to one of a pair of signals stereophonically related, and a subcarrier detector for deriving the audio signal information from said subcarrier sideband signals, characterized by a combined filter and attenuation circuit coupling said input circuit with said subcarrier detector with a amplitude characteristic as a function of the frequency exhibiting attenuation for signals on either side of the center frequency of said subcarrier sidebands at a rate that causes the higher audio frequencies from said subcarrier detector to be attenuated in a complementary mannerat the frequency of pre-upsetting said one of a pair of stereo-related signals. (Machine-translation by Google Translate, not legally binding)