Method and apparatus for generating phase shifted local...

Details Method and apparatus for generating phase shifted local... Method and apparatus for generating phase shifted local...

2007-11-16

2011-11-15

Ha, Dac (Department: 2611)

Pulse or digital communications

Synchronizers

Phase displacement, slip or jitter correction

C375S373000, C375S371000, C375S354000, C375S219000, C375S295000, C375S316000, C455S126000, C327S156000, C327S147000

Reexamination Certificate

active

08059777

ABSTRACT:
A transmitter is provided with a local oscillator (LO) processing unit to maintain stability in the transmitter's feedback loop. The LO processing unit includes at least one delay locked loop (DLL) and a programmable divider to generate phase shifted LO signals for adjusting a loop phase of the feedback loop in the transmitter. The generated phase shifted LO signals are of both a coarse and fine phase shifted nature. The adjustability and control of the coarse and fine phase shifting of the LO signals maintains linearity in the transmitter feedback loop.

REFERENCES:
patent: 5066923 (1991-11-01), Gailus et al.
patent: 6963620 (2005-11-01), Lee et al.
patent: 7203251 (2007-04-01), Kim et al.
patent: 2007/0279109 (2007-12-01), Kirschenmann
PCT/US2008/081007—International Search Report and Written Opinion Mailed Jun. 3, 2009—12 pages.

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