Oscillators – Automatic frequency stabilization using a phase or frequency... – Tuning compensation
Reexamination Certificate
2006-10-30
2010-06-22
Mis, David (Department: 2817)
Oscillators
Automatic frequency stabilization using a phase or frequency...
Tuning compensation
C331S00100A, C331S078000
Reexamination Certificate
active
07741918
ABSTRACT:
A frequency synthesizer is described. In particular, the frequency synthesizer includes a modulator circuit for producing a signal of modulated frequency. The frequency synthesizer includes an accumulator for summing a plurality of errors in the modulator circuit. An error sum value is generated. More particularly, the accumulator increases the rate of sign change of the plurality of errors. An error signal modulator is coupled to the accumulator and modulates an index that is associated with a current error based on the error sum value. The index that is modulated is used for selecting a feedback loop divider count value used for dividing a frequency of the signal. As a result, the error noise around a target signal shows an increased sign change of error, which moves the error noise to higher frequencies. This improves EMI performance.
REFERENCES:
patent: 3868597 (1975-02-01), Gollinger
patent: 4857866 (1989-08-01), Tateishi
patent: 4965531 (1990-10-01), Riley
patent: 5021754 (1991-06-01), Shepherd et al.
patent: 5036216 (1991-07-01), Hohmann et al.
patent: 5036294 (1991-07-01), McCaslin
patent: 5055802 (1991-10-01), Hietala et al.
patent: 5084685 (1992-01-01), Moller et al.
patent: 5117206 (1992-05-01), Imamura
patent: 5182528 (1993-01-01), Zuta
patent: 5457433 (1995-10-01), Westwick
patent: 5483558 (1996-01-01), Leon et al.
patent: 5486795 (1996-01-01), Spence et al.
patent: 5566093 (1996-10-01), Holzer
patent: 5631920 (1997-05-01), Hardin
patent: 5703540 (1997-12-01), Gazda et al.
patent: 5764112 (1998-06-01), Bal et al.
patent: 5781044 (1998-07-01), Riley et al.
patent: 5861766 (1999-01-01), Baumer et al.
patent: 6104257 (2000-08-01), Mann
patent: 6154158 (2000-11-01), Walker
patent: 6167245 (2000-12-01), Welland et al.
patent: 6181218 (2001-01-01), Clark et al.
patent: 6236703 (2001-05-01), Riley
patent: 6285264 (2001-09-01), Mann
patent: 6308055 (2001-10-01), Welland et al.
patent: 6377646 (2002-04-01), Sha
patent: 6456164 (2002-09-01), Fan
patent: 6509800 (2003-01-01), Stockton
patent: 6563390 (2003-05-01), Kizziar
patent: 6707855 (2004-03-01), Patana
patent: 6779010 (2004-08-01), Humphreys et al.
patent: 6919744 (2005-07-01), Paist et al.
patent: 7015733 (2006-03-01), Giuroiu
patent: 7042258 (2006-05-01), Booth et al.
patent: 7065172 (2006-06-01), Xiu et al.
patent: 7119630 (2006-10-01), Li
patent: 7123101 (2006-10-01), Puma et al.
patent: 7126436 (2006-10-01), Li
patent: 7127225 (2006-10-01), Jaehne et al.
patent: 7323916 (2008-01-01), Sidiropoulos et al.
patent: 7330078 (2008-02-01), Li et al.
patent: 7356107 (2008-04-01), Xiu et al.
patent: 7382817 (2008-06-01), Ojard et al.
patent: 7405629 (2008-07-01), Li
patent: 2003/0058055 (2003-03-01), Sridharan
patent: 2003/0142838 (2003-07-01), Brennan et al.
patent: 2004/0022340 (2004-02-01), Jaehne et al.
patent: 2005/0017887 (2005-01-01), Nagaso et al.
patent: 1345375 (2003-09-01), None
patent: 99/14859 (1999-03-01), None
Shuliang Li, Application entitled: “A Phase Lock Loop Control System and Method”, Filing date: Oct. 30, 2006, U.S. Appl. No. 11/590,385.
Shuliang Li, Application entitled: “Spread Spectrum Frequency Synthesizer With Improved Frequency Shape by Adjusting the Length Ofa Standard Curve Used for Spread Spectrum Modulation”, Filing Date: Oct. 30, 2006, U.S. Appl. No. 11/590,483 .
Shuliang Li, Application entitled: “A Phase Lock Loop Control Error Selection System and Method”:, Filing Date: Oct. 30, 2006, U.S. Appl. No. 11/590,361.
Shuliang Li, Application entitled: “Phase Lock Loop control System and Method with Non-Consecutive Feedback Divide Values”, Filing Date: Oct. 30, 2006, U.S. Appl. No. 11/590,362 .
Shuliang Li, Application entitled: “Spread Spectrum Frequency Synthesizer with First Order Accumulation For Frequency Profile Generation”, Filing Date: Oct. 30, 2006, U.S. Appl. No. 11/590,433.
Shuliang Li, Application entitled: “Spread Spectrum Frequency Synthesizer With Higher Order Accumulation For Frequency Profile Generation”, Filing Date: Oct. 30, 2006, U.S. Appl. No. 11/590,149 .
Shuliang Li, Application entitled: “A Simplified Phase Lock Loop Control Model System and Method”, Filing Date: Oct. 30, 2006, U.S. Appl. No. 11/590,078.
Shuliang, Li, Application entitled: “Spread Spectrum Frequency Synthesizer With Improved Frequency Profile by Adjusting the Shape of a Standard Curve Used for Spread Spectrum Modulation”, Filing Date: Oct. 30, 2006, U.S. Appl. No. 11/590,481.
Shuliang, Li, Application entitled: “Frequency Modulator, Circuit, and Method That Uses Multiple Vector Accumulation to Achieve Fractional-n. Frequency Synthesis”, Filing Date: Jun. 30, 2005, U.S. Appl. No. 11/172,691.
DeMuer et al., “A 1.8 Ghz CMOS Fractional-N. Synthesizer, ”EP Solid-State Circuits Conference, 2001, 4 pages.
Ahola et al., “A 2GHz Fractional-n. Frequency Synthesizer in 0.35 CMOS,” EP Solid-State Circuits Conference, 2000 4 pages.
Lin et al., “A 900-MHz 2.5-mA CMOS Frequency Synthesizer with an Automatic SC Tuning Loop,” IEEE Journal of Solid-States Circuits, vol. 36, No. 3, Mar. 2001, pp. 424-431.
Schmitt et al., Designing an EMC-Compliant UHF Oscillator, RF Design, Oct. 2000, 8 pages.
Heuberger et al., “Integrated RF Transmitter Based on Saw Oscillator,” EP Solid-State Circuits Conference, 1997, 4 pages.
Texas Instruments, Technical Brief SWRA029, “Fractionalllnteger-N PLL Basics,” Aug. 1999, pp. 1-54.
International Search Report. PCT/US2006/02476, mailed Oct. 12, 2006.
USPTO Notice of Allowance for U.S. Appl. No. 10/947,518 dated Jun. 2, 2006; 4 pages.
USPTO Non-Final Rejection for U.S. Appl. No. 10/947,518 dated Dec. 28, 2005; 5 pages.
USPTO Notice of Allowance for U.S. Appl. No. 10/947,519 dated Jun. 9, 2006; 6 pages.
USPTO Non-Final Rejection for U.S. Appl. No. 10/947,519 dated Dec. 20, 2005; 5 pages.
USPTO Notice of Allowance for U.S. Appl. No. dated Mar. 19, 2008; 8 pages.
USPTO Final Rejection for or U.S. Appl. No. 11/172,691 dated Jul. 19, 2007; 7 pages.
USPTO Non-Final Rejection for U.S. Appl. No. 11/172,691 dated Feb. 2, 2007; 9 pages.
USPTO Final Rejection for U.S. Appl. No. 11/590.385 dated Jan. 15, 2009; 7 pages.
USPTO Non-Final Rejection for U.S. Appl. No. 11/590,385 dated Jul. 17, 2008; 8 pages.
USPTO Final Rejection for U.S. Appl. No. 11/590,361 dated Dec. 4, 2008; 8 pages.
USPTO Non-Final Rejection for U.S. Appl. No. 11/590,361 dated May 13, 2008; 7 pages.
USPTO Non-Final Rejection for U.S. Appl. No. 11/590,481 dated Nov. 26, 2008; 8 pages.
USPTO Final Rejection for U.S. Appl. No. 11/590,078 dated Jan. 15, 2009; 8 pages.
USPTO Non-Final Rejection for U.S. Appl. No. 11/590,078 dated Jul. 17, 2008. 8 pages.
USPTO Final Rejection for U.S. Appl. No. 11/590,362 dated Jan. 14, 2009; 7 pages.
USPTO Non-Final for U.S. Appl. No. 11/590,362 dated Jul. 17, 2008; 8 pages.
USPTO Notice of Allowance for U.S. Appl. No. 11/590,483 dated Jan. 16, 2009; 4 pages.
USPTO Notice of Allowance for U.S. Appl. No. 11/590,483 dated Aug. 12, 2008; 5 pages.
USPTO Notice of Allowance for U.S. Appl. No. 11/590,483 dated May 11, 2008: 6 pages.
USPTO Advisory Action for U.S. Appl. No. 11/590,385 dated Mar. 25, 2009; 3 pages.
USPTO Non-Final Rejection for U.S. Appl. No. 11/590,385 dated Jun. 25, 2009; 10 pages.
USPTO Non-Final Rejection for U.S. Appl. No. 11/590,361 dated Mar. 30, 2009; 8 pages.
USPTO Notice of Allowance for U.S. Appl. No. 11/590,481 dated Jun. 4, 2009; 6 pages.
USPTO Advisory Action for U.S. Appl. No. 11/590,078 dated Mar. 25, 2009; 3 pages.
USPTO Non-Final Rejection for U.S. Appl. No. 11/590,078 dated Jun. 25, 2009; 10 pages.
USPTO Advisory Action for U.S. Appl. No. 11/590,362 dated Apr. 3, 2009; 3 pages.
USPTO Non-Final Rejection for Application No. 11/590,362 dated Jun. 15, 2009; 11 pages.
USPTO Notice of Allowance for Application No. 11/590,483 dated May 7, 2009; 5 pages.
U.S. Appl. No. 09/753,063: “Digitally Compensated Voltage Controlled Oscillator,” John Kizziar; filed Dec. 29, 2000; 27 pages.
U.S.
Cypress Semiconductor Corporation
Mis David
LandOfFree
System and method for an enhanced noise shaping for spread... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System and method for an enhanced noise shaping for spread..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method for an enhanced noise shaping for spread... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4175268