Tuner for receiving television signal in VHF band and UHF band

Details Tuner for receiving television signal in VHF band and UHF band Tuner for receiving television signal in VHF band and UHF band

2005-06-07

2005-06-07

Miller, John (Department: 2614)

Television

Receiver circuitry

Tuning

C348S732000, C348S733000

Reexamination Certificate

active

06903783

ABSTRACT:
In a television tuner, a predetermined bias voltage is applied to the anode of a first switching diode. A power supply voltage is applied to the collector of a switching transistor via a power supply resistor, and the emitter of the switching transistor is grounded. The collector of the switching transistor is connected to an input terminal of a first FET via a first resistor. The first switching diode and the switching transistor are both switched on or off correspondingly to whether a television signal in the UHF band is to be received or a television signal in the VHF band is to be received.

REFERENCES:
patent: 4499602 (1985-02-01), Hermeling et al.
patent: 4580288 (1986-04-01), Rinderle
patent: 4596044 (1986-06-01), Aoki et al.
patent: 6392715 (2002-05-01), Sato et al.
patent: 6665022 (2003-12-01), Yamamoto et al.
patent: 19819544 (1999-11-01), None
patent: 0457932 (1991-11-01), None
patent: 1047192 (2000-10-01), None
patent: 2001-156593 (2001-06-01), None

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