Modulators – Frequency modulator
Reexamination Certificate
2009-01-28
2011-10-25
Johnson, Ryan (Department: 2817)
Modulators
Frequency modulator
C332S103000, C332S120000, C375S130000
Reexamination Certificate
active
08044745
ABSTRACT:
Various apparatuses and methods for offsetting the phase and/or frequency of a clock signal are disclosed herein. For example, some embodiments provide an apparatus for generating a clock signal, including a quadrature delay circuit connected to an input clock signal. The quadrature delay circuit outputs components of the input clock signal with different phase shifts. A first amplitude modulator is connected to the first output of the quadrature delay circuit, and a second amplitude modulator is connected to the second output of the quadrature delay circuit. A summer combines the output of the first and second amplitude modulators.
REFERENCES:
patent: 3231672 (1966-01-01), Collins, Jr. et al.
patent: 5111163 (1992-05-01), Erlich
patent: 6072374 (2000-06-01), Takahashi
patent: 6130919 (2000-10-01), Lin
patent: 6653896 (2003-11-01), Sevic et al.
patent: 6983024 (2006-01-01), Ballantyne
patent: 2004/0066857 (2004-04-01), Srinivasan et al.
Hsieh et al., “Clock and Data Recovery with Adaptive Loop Gain for Spread Spectrum SerDes Applications”, May 2005, Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on, vol. 5, pp. 4883-4886.
Chen, Wei-Ta et al, “A Spread Spectrum Clock Generator for SATA-II”, Int'l Symposium on Circuits and Systems, 2005, pp. 2643-2646.
Chen, Chao-Chyun et al, “A Fully Integrated Spread Spectrum Clock Generator”, Int'l Symposium on VLSI Design, Automation and Test, 2006, pp. 1-4.
Hsieh, Yi-Bin and Kao, Yao-Huang, “A New Spread Spectrum Clock Generator for SATA Using Double Modulation Schemes”, Custom Integrated Circuits Conference, 2007, pp. 297-300.
Lee, Hyung-Rok et al, “A low-jitter 5000ppm spread spectrum clock generator for multi-channel SATA transceiver in 0.18 um CMOS”, ISSCC, 2005, pp. 162-590.
Agere Systems Inc.
Hamilton DeSanctis & Cha
Johnson Ryan
LandOfFree
Method and apparatus for applying clock phase and frequency... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for applying clock phase and frequency..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for applying clock phase and frequency... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4290237