Radio-frequency tuner with differential converter

Details Radio-frequency tuner with differential converter Radio-frequency tuner with differential converter

2011-06-07

2011-06-07

Jackson, Blane J (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

C455S191300, C455S180100, C455S318000

Reexamination Certificate

active

07957714

ABSTRACT:
A system for tuning a radio-frequency signal includes a first input path, a second input path, a common reference generator, a selector, a mixer, and a filter. The first input path and the second input path propagate a first single-ended input signal and a second single-ended input signal, respectively, to the selector. The selector converts the first single-ended input signal and the second single-ended input signal into a first differential input signal and a second differential input signal, respectively, using a reference signal generated by the common reference generator.The selector selectively couples one of the first and the second input path to an input of the mixer. The mixer downconverts a selected on of the differential input signals received from the selector. The filter attenuates a portion of the downconverted input signal outside a passband associated with the filter.

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PCT Notification of Transmittal of the International Search Report and Written Opinion of the International Searching Authority, or the Declaration in International Application No. PCT/US06/33573, dated May 18, 2007, 11 pages.

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