Tuner arrangement

Details Tuner arrangement Tuner arrangement

2005-05-13

2008-10-14

Vuong, Quochien B (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

C455S150100, C455S255000, C455S317000, C455S323000

Reexamination Certificate

active

07437134

ABSTRACT:
A tuner arrangement is provided comprising one or more tuners. Each tuner has two or more frequency changers, each comprising a mixer and a local oscillator. A controller controls the local oscillators in response to receipt of a channel select request. The controller determines the nominal frequencies of the local oscillators for tuning the selected channel and then performs a calculation to determine whether any beat frequencies between harmonics greater than the first harmonic of the local oscillators lie within the frequency band at the tuner output occupied by the selected channel. If so, the controller shifts the local oscillator frequencies so as to move the potentially interfering products outside the utilised band and then tunes the local oscillators appropriately.

REFERENCES:
patent: 4340975 (1982-07-01), Onishi et al.
patent: 4553264 (1985-11-01), Hasegawa et al.
patent: 4661995 (1987-04-01), Kashiwagi
patent: 5115317 (1992-05-01), Igarashi et al.
patent: 5343168 (1994-08-01), Guthrie
patent: 5847612 (1998-12-01), Birleson
patent: 6057876 (2000-05-01), Waight
patent: 6567654 (2003-05-01), Coronel Arredondo et al.
patent: 2004/0117861 (2004-06-01), Dessert et al.
patent: 101 16 880 (2002-10-01), None
patent: 1 182 774 (2004-01-01), None
patent: 1 248 360 (2004-04-01), None

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