Fm receiver with subcarrier decoding circuit

Details Fm receiver with subcarrier decoding circuit Fm receiver with subcarrier decoding circuit

H - Electricity

04

B

325/87

H04B 1/16 (2006.01) G08G 1/09 (2006.01) H03J 7/18 (2006.01)

Patent

CA 1188742

Abstract of the Disclosure To prevent loss of information during an announcement in a traffic or announcement recognition system in which, during radiation of an announcement, a subcarrier is modulated to a lesser degree by a radio station or region recognition frequency (RR) but to a higher degree by an announcement recognition (AR frequency) during an announcement only, and a logic circuit is included in the announcement decoder which recognizes (1) presence of an RR signal to tune the receiver to the station radiated, and (2) presence of an AR signal, the presence of the AR signal being sensed and utilized to inhibit re-tuning of the receiver even though the previously detected RR signal may no longer be detected by the receiver.

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