Pulse or digital communications – Synchronizers – Phase displacement – slip or jitter correction
Reexamination Certificate
2005-08-31
2009-02-17
Fan, Chieh M (Department: 2611)
Pulse or digital communications
Synchronizers
Phase displacement, slip or jitter correction
C375S371000, C375S362000, C375S373000, C375S374000, C375S375000, C455S264000, C455S208000, C455S260000, C327S147000, C327S141000, C327S148000, C327S149000, C327S150000, C327S155000, C327S156000, C327S157000, C327S158000, C327S159000, C331S016000, C331S025000
Reexamination Certificate
active
07492850
ABSTRACT:
The phase locked loop (PLL) with adjustable phase shift is described. The PLL includes a voltage controlled oscillator which is capable of generating multiple phase shifted output signals, and multiple phase detectors capable of determining the phase differences between the output signals and a reference clock. The PLL further includes a weighting device capable of weighting the phase differences and generating a control signal for the voltage controlled oscillator.
REFERENCES:
patent: 6965761 (2005-11-01), Welland et al.
patent: 2002/0009170 (2002-01-01), Schmatz
patent: 2004/0218705 (2004-11-01), Cranford et al.
Menolfi Christian Ivo
Toifl Thomas Helmut
Fan Chieh M
International Business Machines - Corporation
Keusey, Tutunjian & & Bitetto, P.C.
Lee Siu M
Verminski, Esq. Brian P.
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