Television tuner capable of improving image disturbance with...

Details Television tuner capable of improving image disturbance with... Television tuner capable of improving image disturbance with...

2007-11-13

2007-11-13

Yenke, Brian P. (Department: 2622)

Television

Receiver circuitry

Tuning

C348S607000, C348S725000, C455S180400, C455S191300

Reexamination Certificate

active

11041156

ABSTRACT:
The present invention provides to provide a television tuner capable of improving image disturbance when receiving a UHF band television signal. The television tuner comprises a tuning circuit having a tuning circuit having two varactor diodes connected in series with a connection point between the two varactor diodes serving as an output terminal and a coupling inductive element having its one end connected to an input terminal of the tuning circuit and the other end connected to an input terminal of an television signal. One varactor diode is connected to the input terminal of the tuning circuit, the other varactor diode is interposed between the output terminal and a ground, and a first capacitive element is connected between the other end of the inductive element and the connection point between the two varactor diodes.

REFERENCES:
patent: 6566953 (2003-05-01), Yamamoto
patent: 6864925 (2005-03-01), Yamamoto
patent: 6900850 (2005-05-01), Yamamoto
patent: 6933984 (2005-08-01), Yamamoto et al.
patent: 6950152 (2005-09-01), Yamamoto
patent: 7139039 (2006-11-01), Yamamoto
patent: 7142833 (2006-11-01), Hibino et al.
patent: 11-266407 (1999-09-01), None
patent: 2003-134410 (2003-05-01), None

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