System and method for adjusting the phase of a...

Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Synchronizing

Reexamination Certificate

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C375S376000, C327S147000, C327S156000, C327S163000

Reexamination Certificate

active

10322717

ABSTRACT:
A clock signal regeneration system and method to adjust the phase of a frequency-locked clock signal is provided. The system includes a numerically controlled oscillator, a clock source, and an adder. In one embodiment, additional components are included in the system to ensure that underflow or overflow of the numerically controlled oscillator is prevented. In another embodiment, additional components are included to ensure that output pulses from the numerically controlled oscillator do not occur within a minimum time interval. The method includes deriving a phase adjustment factor, adding the phase adjustment factor to a frequency control word, providing the modified frequency control word to a numerically controlled oscillator and generating a phase shifted, frequency-locked output signal.

REFERENCES:
patent: 4241308 (1980-12-01), Lovelace et al.
patent: 5382913 (1995-01-01), Carson et al.
patent: 2001/0004380 (2001-06-01), Mannermaa
patent: 2002/0122467 (2002-09-01), Camp et al.
patent: 2002/0154620 (2002-10-01), Azenkot et al.
patent: 2003/0039319 (2003-02-01), Engelse et al.
patent: 2003/0201840 (2003-10-01), Schoner
patent: WO98/28849 (1998-07-01), None

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