Tuner for digital terrestrial broadcast signals

Details Tuner for digital terrestrial broadcast signals Tuner for digital terrestrial broadcast signals

2006-06-20

2006-06-20

Vo, Nguyen T. (Department: 2685)

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

C455S302000, C455S307000, C455S340000

Reexamination Certificate

active

07065337

ABSTRACT:
A single conversion tuner is provided for receiving digital terrestrial broadcast signals. The tuner comprises a single frequency changer comprising a mixer and local oscillator controlled by a PLL synthesiser. A non-alignable variable low pass filter is provided between the tuner input and the mixer, which is of the image reject type. The bandwidth of the filter is varied so as to track the local oscillator frequency to provide sufficient attenuation of the image channel without requiring any alignment during manufacture.

REFERENCES:
patent: 4435841 (1984-03-01), Dobrovolny
patent: 5179730 (1993-01-01), Loper
patent: 5940143 (1999-08-01), Igarashi et al.
patent: 5963856 (1999-10-01), Kim
patent: 6029052 (2000-02-01), Isberg et al.
patent: 6112070 (2000-08-01), Katsuyama et al.
patent: 6161004 (2000-12-01), Galal et al.
patent: 6909882 (2005-06-01), Hayashi et al.
patent: 6915121 (2005-07-01), Python et al.
patent: 2004/0087279 (2004-05-01), Muschallik et al.
patent: 2004/0266376 (2004-12-01), Cowley et al.
patent: 0 766 418 (1997-09-01), None
patent: 2 350 948 (1999-06-01), None
patent: 01/41424 (2001-06-01), None
Search Report regarding corresponding Great Britain Application No. 0216450.7 dated Feb. 26, 2003.

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