Telecommunications – Receiver or analog modulated signal frequency converter – Frequency modifying or conversion
Reexamination Certificate
2005-11-29
2005-11-29
Corsaro, Nick (Department: 2682)
Telecommunications
Receiver or analog modulated signal frequency converter
Frequency modifying or conversion
C455S118000, C455S126000, C455S310000, C455S317000, C455S115100, C455S313000, C455S323000, C327S113000
Reexamination Certificate
active
06970689
ABSTRACT:
A state of a programmable mixer is set during a calibration phase to minimize local oscillator feedthrough. During a calibration phase, inputs to the programmable mixer are set to zero, or to a known state and the local oscillator is set to a calibration frequency. Then, one of a plurality of known calibration states of the programmable mixer is entered and the local oscillator feedthrough is measured. For each of a plurality of operating states an amplified output of the programmable mixer is measured. In one operation, the state of the programmable mixer in which the programmable mixer operates during a next operation phase is the state that produces minimal local oscillator feedthrough. In another operation, operation continues until a state is found that produces a local oscillation feedthrough that meets an operating criteria and that state is used during the next operation phase. After these operations are complete, programmable mixer calibration operations are completed until the next calibration phase commences.
REFERENCES:
patent: 5001773 (1991-03-01), White
patent: 5471665 (1995-11-01), Pace et al.
patent: 5652547 (1997-07-01), Mokhtar et al.
patent: 5793817 (1998-08-01), Wilson
patent: 5862466 (1999-01-01), Erickson
patent: 6058291 (2000-05-01), Ketcham
patent: 6535725 (2003-03-01), Hatcher et al.
patent: 6567649 (2003-05-01), Souissi
patent: 6594504 (2003-07-01), Grasset
patent: 6711396 (2004-03-01), Bergsma et al.
patent: 6763227 (2004-07-01), Kramer
patent: 6801761 (2004-10-01), Khorram
patent: 6868128 (2005-03-01), Lane
patent: 2001/0053671 (2001-12-01), Friedlander et al.
patent: 2003/0194976 (2003-10-01), Bhatti
Corsaro Nick
Garlick Bruce
Garlick & Harrison & Markison
Hamilton Gary W.
Persino Raymond B.
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