Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Synchronizing
Reexamination Certificate
2005-03-22
2005-03-22
Lam, Tuan T. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Synchronizing
C327S156000, C327S105000
Reexamination Certificate
active
06870409
ABSTRACT:
A fractional-N frequency synthesizer includes a first divider, a second divider, and a division ratio controller. The first divider receives and divides an oscillation frequency signal. The second divider receives a predetermined feedback frequency signal and divides the feedback frequency signal in response to a selection signal. The division ratio controller receives and divides an output signal of the first divider and an output signal of the second divider and generates a reference frequency signal in which the oscillation frequency signal is divided, a comparison frequency signal that is compared with the reference frequency signal, and the selection signal used to select the division ratio of the second divider.
REFERENCES:
patent: 4179670 (1979-12-01), Kingsbury
patent: 4851787 (1989-07-01), Martin
patent: 5305362 (1994-04-01), Miller
patent: 5424687 (1995-06-01), Fukuda
patent: 5903194 (1999-05-01), Opsahl et al.
patent: 6624705 (2003-09-01), Huard et al.
patent: 6708026 (2004-03-01), Klemmer et al.
patent: 20020145472 (2002-10-01), Oh
patent: 20020163389 (2002-11-01), Jun
patent: 20030109237 (2003-06-01), Chien et al.
patent: 20030112079 (2003-06-01), Saeki et al.
patent: 20030119466 (2003-06-01), Goldman
patent: 20030137359 (2003-07-01), Patana
patent: 9-312567 (1997-11-01), None
patent: 10-163866 (1998-12-01), None
patent: 1996-20000 (1996-06-01), None
patent: 1999-0074953 (1999-10-01), None
Rhee et al., A 1.1-GHz CMOS Fractional-N Frequency Synthesizer with a 3-b Third-Order Modulator, IEEE Journal of Solid-State Circuits, vol. 35, No. 10, Oct. 2000, pp. 1453-1460.
Riley et al., Delta-Sigma Modulation in Fractional-N Frequency Synthesis, IEEE Journal of Solid-State Circuits, vol. 28, No. 5, May 1993, pp. 553-559.
Lam Tuan T.
Samsung Electronics Co,. Ltd.
LandOfFree
Frequency synthesizer for reducing noise does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Frequency synthesizer for reducing noise, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Frequency synthesizer for reducing noise will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3398084