Pulse or digital communications – Transmitters
Reexamination Certificate
2006-09-19
2006-09-19
Fan, Chieh M. (Department: 2611)
Pulse or digital communications
Transmitters
C375S296000, C375S224000, C455S126000, C244S118100
Reexamination Certificate
active
07110469
ABSTRACT:
A self-calibrating transmitter includes an up-conversion mixing module, summing module, calibration determination module, and a calibration execution module. The up-conversion mixing module is operably coupled to mix an I component of a base-band signal with an I component of a local oscillation to produce a mixed I signal and is also operably coupled to mix a Q component of the base-band signal with a Q component of the local oscillation to produce a mixed Q signal. The summing module sums the mixed I signal with the mixed Q signal to produce a modulated radio frequency (RF) signal. The calibration determination module is operably coupled to produce a calibration signal, which it generates by interpreting the local oscillation and the modulated RF signal. The calibration execution module is operably coupled to calibrate the DC level of the I and/or Q component of the base-band signal, and/or the gain of the I and/or Q component of the base-band signal based on the calibration signal.
REFERENCES:
patent: 5995541 (1999-11-01), Navid et al.
patent: 6819910 (2004-11-01), Shi et al.
patent: 2003/0071110 (2003-04-01), Hilbert
patent: 2003/0095607 (2003-05-01), Huang et al.
Jensen Henrik T.
Shi Hong
Broadcom Corporation
Fan Chieh M.
Garlick & Harrison & Markison
Stuckman Bruce E.
Zheng Eva
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