Adjusting a programmable mixer

Details Adjusting a programmable mixer Adjusting a programmable mixer

2006-10-31

2006-10-31

Urban, Edward F. (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

C455S319000, C455S293000, C327S116000

Reexamination Certificate

active

07130607

ABSTRACT:
A method for adjusting a programmable mixer of a local oscillation module to reduce local oscillation leakage begins by determining at least one of: DC offset of an input signal of the programmable mixer and process mismatches between a first mixing stage and a second mixing stage. The method continues by determining operational characteristics mismatch between the first mixing stage and the second mixing stage based on the at least one of the DC offset and process mismatches. The method continues by generating a control signal to substantially compensate for the operational characteristics mismatch. The method continues by providing the control signal to a compensation module, wherein the compensation module modifies operational characteristics of at least one of the first and second mixing stages based on the control signal such that the operational characteristics of the first mixing stage substantially equals the operational characteristics of the second mixing stage.

REFERENCES:
patent: 6032028 (2000-02-01), Dickey et al.
patent: 6192225 (2001-02-01), Arpaia et al.
patent: 6535725 (2003-03-01), Hatcher et al.
patent: 6625435 (2003-09-01), Ramesh
patent: 6711396 (2004-03-01), Bergsma et al.
patent: 6801761 (2004-10-01), Khorram
patent: 2002/0160738 (2002-10-01), Allott et al.

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