Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Electrical signal parameter measurement system
Reexamination Certificate
2007-06-18
2010-02-23
Nghiem, Michael P. (Department: 2863)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Electrical signal parameter measurement system
C375S225000
Reexamination Certificate
active
07668672
ABSTRACT:
A method and systems for automatically adjusting the parameters of signal emitter in a synchronous high-speed transmission system, is disclosed. According to the method of the invention, the quality of a high-speed received signal is analyzed for a plurality of sets of parameter values and the one producing the best signal quality is selected. In a first embodiment, the quality of the high-speed received signal is determined by analyzing a digital eye characterizing the signal behavior, obtained by over-sampling the high-speed received signal. In a second embodiment, the quality of the high-speed received signal is determined by analyzing the behavior of the phase rotator used for data sampling. Finally, in a third embodiment, the quality of the high-speed received signal is determined by analyzing a digital eye, obtained by moving the position of a phase rotator from one end to the other and sampling data at each position.
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Blanc Alain
Jeanniot Patrick
Daugherty Patrick J.
Driggs, Hogg, Daugherty & Del Zoppo Co., LPA
International Business Machines - Corporation
Le Toan M
Nghiem Michael P.
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