FM TRAP FOR A TELEVISION TUNER PERMITTING BOTH TV AND FM RECEPTION THROUGH THE SAME TUNER

摘要

A television receiver includes a single tuner ( 102) fortuning both television channels and broadcast FM stations. The tuner(102) is operated at a fixed gain setting in FM reception mode. Thetuner serves as the first conversion stage of a double conversion FMreceiver, wherein the mixer of an FM radio integrated circuit servesas the second coversion stage. The arrangement operates at aspecific and non-arbitrary first IF frequency. The FM receiver is alsocapable of automatically receiving an information service such asNational Weather Service broadcasts on that one of NWS's sevenallocated frequencies which is operating in a listener's area. Thereceiver provides an on-screen display (410) of the currently tunedFM channel number.