Television tuner which operates at low voltage

Details Television tuner which operates at low voltage Television tuner which operates at low voltage

2006-07-18

2006-07-18

Hsia, Sherrie (Department: 2614)

Television

Receiver circuitry

Tuning

C348S733000

Reexamination Certificate

active

07079196

ABSTRACT:
A television tuner has a high frequency tuning circuit, a high frequency amplifier, a mixer, and an oscillating section. The tuning circuit is made up of an inductor and plural capacitors and at least one of the capacitors is selected and connected in parallel with the inductor; and the oscillating section has at least plural oscillators which are included in an integrated circuit. In the integrated circuit, the oscillators respectively have variable capacitors to vary a frequency of a local oscillation signal. Groups into which a receiving frequency band is divided correspond to the oscillators on the basis of one oscillator per group; and each of the oscillators generates local oscillation frequencies depending on television signals in the corresponding group.

REFERENCES:
patent: 6351294 (2002-02-01), Yamamoto et al.
patent: 6573949 (2003-06-01), Yamamoto
patent: 6822697 (2004-11-01), Osada
patent: 06-319087 (1994-11-01), None

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