Dynamically matched mixer system with improved in-phase and...

Details Dynamically matched mixer system with improved in-phase and... Dynamically matched mixer system with improved in-phase and...

2007-07-31

2007-07-31

Nguyen, Duc M. (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Noise or interference elimination

C455S310000, C455S311000

Reexamination Certificate

active

10890691

ABSTRACT:
A dynamically matched mixer system (200) for use in a direct conversion radio frequency (RF) receiver includes a frequency generator (201, 203, 205) that includes plurality of dividers (407) for providing differential local oscillator reference sources (FLO+and FLO−) and mitigation frequency reference sources (F1and F2) from reference oscillator (205). A mixer (209) mixes the differential local oscillator reference sources (FLO+and FLO−) and the mitigation frequency reference sources (F1and F2) while dynamic matching units (211, 213) are used for receiving the mitigation frequency reference sources and matching switching parameters of differential input signals (IRF+and IRF−) and differential baseband output signals (IBB+and IBB−). The frequencies of the mitigation frequency reference sources (F1and F2) are selected so as to establish a non-integer relationship to the reference oscillator (201) for mitigating the occurrence of interference with FLO+and FLO−.

REFERENCES:
patent: 5859559 (1999-01-01), Hong et al.
patent: 6125272 (2000-09-01), Bautista et al.
patent: 6933766 (2005-08-01), Khlat et al.
patent: 2004/0246047 (2004-12-01), Manku et al.
patent: 2005/0272394 (2005-12-01), Heck

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