Adaptive phase controller, method of controlling a phase and...

Pulse or digital communications – Transmitters – Antinoise or distortion

Reexamination Certificate

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Details

C375S376000, C375S326000, C375S374000, C370S350000, C370S355000, C455S084000, C455S126000

Reexamination Certificate

active

10685018

ABSTRACT:
The present invention is directed to an adaptive phase controller employing a threshold level and a method of controlling a phase. In one embodiment, the adaptive phase controller includes a comparator configured to receive a comparison signal representing a phase and to provide a vernier signal based on comparing first and second samples of the comparison signal when the comparison signal is below the threshold level. Additionally, the adaptive phase controller also includes an adder/decoder coupled to the comparator and configured to adjust a current number corresponding to the phase based on the vernier signal.

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patent: 5986485 (1999-11-01), O'Sullivan
patent: 5991350 (1999-11-01), Yamamoto
patent: 2002/0041215 (2002-04-01), Kiyose
patent: 2003/0203720 (2003-10-01), Oosawa et al.
Joel L. Dawson “Automatic Phase Alignment for High Bandwidth Cartesian Feedback Power Amplifiers” IEEE; 2000; pp. 71-74.
Inventor: Erik B. Busking; U.S. Appl. No. 10/442,623 entitled “A Vector Monitor, Related Method of Controlling a Transmitter Employing the Same” filed May 21, 2003.
Inventors: Yanling Sun and Erik B. Busking; U.S. Appl. No. 10/159,651 entitled “Group Delay Precompensator for Broadband Radio Frequency Transmitter and Method of Operating the Same” filed May 31, 2002.

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