Integrated circuit tuner with broad tuning range

Details Integrated circuit tuner with broad tuning range Integrated circuit tuner with broad tuning range

2007-03-06

2007-03-06

Vuong, Quochien B. (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

C455S179100, C455S307000, C455S333000, C348S731000

Reexamination Certificate

active

10349931

ABSTRACT:
An integrated front end filter for a tuner provides an array of from several to a multitude of passbands, each for passing at least one but less than all channels designated in a band of frequencies. Each passband is exclusively selectable. The integrated front end filter can include at least one active filter unit with an active reactance element in either of fixed and variable filter configurations and a decoder coupled to said at least one active filter unit and being responsive to a control signal for selecting a one of the passbands. In one example, a multitude of active filter units of fixed filter configuration provide the multitude of passbands. In another example, a plurality of data corresponds to a like plurality of selectable passbands in combination with a filter element of the variable filter configuration. Each data is stored at a predetermined location and reproduced in response to a corresponding control data signal from a tuner controller. Each data characterizes one of the plurality of passbands. The filter element is switchable from one passband to another in response to the control data signal. Lower power dissipation and lesser requirements of an on-following integrated circuitry tuner permit a reduction of “off chip” connections and cost.

REFERENCES:
patent: 5483209 (1996-01-01), Takayama
patent: 5752179 (1998-05-01), Dobrovolny
patent: 6177964 (2001-01-01), Birleson et al.
patent: 6281946 (2001-08-01), Hisada et al.
patent: 6472957 (2002-10-01), Dobrovolny
patent: 6535722 (2003-03-01), Rosen et al.
patent: 2003/0050026 (2003-03-01), Connell et al.

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