Telecommunications – Transmitter – Noise or interference elimination
Reexamination Certificate
2006-08-11
2009-10-27
Le, Lana N (Department: 2614)
Telecommunications
Transmitter
Noise or interference elimination
C455S115100, C455S091000
Reexamination Certificate
active
07610026
ABSTRACT:
The present invention provides a transmitter architecture operable to cancel non-data-related direct current (DC) components therein. One method to cancel transmitter non-data-related DC offsets includes generating a baseband digital null signal. Then the digital null signal is converted to a pair of differential analog voltage null signals. The pair of differential analog voltage null signals may be converted to a pair of differential analog current null signals. The pair of differential analog current null signals is provided to a pair of matched impedances to generate a pair of voltage signals across the pair of matched impedances. A voltage offset results from comparing the pair of voltages generated across the pair of matched impedances. Then a current offset is determined based on the voltage offset.
REFERENCES:
patent: 6826388 (2004-11-01), Tanaka et al.
patent: 6891440 (2005-05-01), Straub et al.
patent: 7085587 (2006-08-01), Oono et al.
patent: 2006/0057991 (2006-03-01), Behzad et al.
patent: 2006/0057999 (2006-03-01), Behzad et al.
patent: 2006/0094395 (2006-05-01), Lee et al.
Broadcom Corporation
Garlick Bruce E.
Garlick & Harrison & Markison
Le Lana N
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