Broadcast receiving system and method, and medium storing a...

Details Broadcast receiving system and method, and medium storing a... Broadcast receiving system and method, and medium storing a...

2006-12-19

2006-12-19

Tran, Trang U. (Department: 2622)

Television

Receiver circuitry

Television receiver adapted to receive radio broadcast or in...

C348S725000, C348S731000, C348S733000

Reexamination Certificate

active

07151577

ABSTRACT:
For receiving a voice FM broadcast it has so far been necessary to separately provide an SAW filter and a voice intermediate frequency amplifier circuit and the freedom of circuit design has been limited.In the present invention there is used a variable filter circuit15(a variable filter means). The variable filter circuit15allows an intermediate frequency signal (IF) to pass therethrough, the intermediate frequency signal being outputted from a mixing circuit14as a constituent of a tuner means. The variable filter circuit15can change a limitation on the frequency band of the intermediate frequency signal passing therethrough. The frequency band of the intermediate frequency signal passing through the variable filter circuit15is thereby limited according to the type of a received broadcasting radio wave, and a VCO circuit32(a variable oscillator means) is controlled so as to change the oscillation frequency of an oscillation signal.

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