Pulse or digital communications – Synchronizers – Phase displacement – slip or jitter correction
Reexamination Certificate
2011-01-18
2011-01-18
Tran, Khanh C (Department: 2611)
Pulse or digital communications
Synchronizers
Phase displacement, slip or jitter correction
C327S040000
Reexamination Certificate
active
07873130
ABSTRACT:
Systems, algorithms, circuits, and methods for pattern detection of signature events in signal dynamics defined by instantaneous states of applied square-wave signals. Selected patterns may be recognized individually or in equivalence classes, and detection may be implemented via state or transition analysis. Varieties of conditions may be detected in parallel, including phase, ambiguity states, and frequency comparison. One embodiment realizes a real-time frequency comparator for asynchronous square-wave signals. Realizations detect various classes of symmetry conditions unique to enveloping events occurring for these classes of square-wave signal pairs. This approach provides feedback-free implementations operating over an extremely wide frequency range and does not require signals of quadrature form. A typical logic circuit implementation involves two to four flip-flops, or two-stage two-bit shift registers, and modest combinational logic. The resulting system can be readily implemented as a utility integrated circuit of modest scale or as a small-scale “IP core” within larger system-on-a-chip (SoIC) devices.
REFERENCES:
patent: 3947775 (1976-03-01), Thiebaut
patent: 3958269 (1976-05-01), Davis
patent: 3987365 (1976-10-01), Okada
patent: 4068171 (1978-01-01), Huguenin
patent: 4278898 (1981-07-01), Rhode
patent: 4320527 (1982-03-01), Takasaki
patent: 4322686 (1982-03-01), Butin
patent: 4527080 (1985-07-01), Zweig
patent: 4677322 (1987-06-01), Burson
patent: 4772852 (1988-09-01), Viti
patent: 4940952 (1990-07-01), Kegasa
patent: 5939901 (1999-08-01), Geddes
patent: 6218907 (2001-04-01), Tamaki
patent: 6392494 (2002-05-01), Takeyabu
patent: 6563346 (2003-05-01), Abbiate
patent: 6650146 (2003-11-01), Liu
patent: 7760840 (2010-07-01), Chang
“Frequency Comparator”, Electronics Design Magazine, Sep. 5, 1995, available at http://www.newcircuits.com/circuit.php?id=msr006, accessed on Jan. 15, 2004.
“Frequency comparator draws 8 μA”, Baranauskas, Dalius., EDN Access, Mar. 3, 1997, available at http://www.edn.com/archives/1997/030397/05DI—05.htm, accessed on Jan. 15, 2004.
“The Phase/Frequency Comparator Simplified”, Forster, Edward., Electronics World, Feb. 1997, available at http://ecforster.netfirms.com/phfrqdet/Doc1.html, accessed on Jan. 15, 2004.
“Symmetry in Packing Problems and Tiling Systems”, Holton, Charles., Oct. 12, 2003.
“Conjugacies for Tiling Dynamical Systems”, Holton, Charles., Jul. 18, 2003, available at http://arxiv.org/PS—cache/math/pdf/0307/0307259v1.pdf.
“Frequency window comparator has hysteresis”, Dijkstra, W., 1996, available at http://www.edn.com/archives/1996/110796/23DI—05.htm, accessed on Jan. 15, 2004.
“Applications of Symbolic Dynamics to Differential Chaos Shift Keying”, Maggio, Gian Mario., Feb. 2001, available at http://www.gmmaggio.com/publications/journals/2002/ieee-cas1—2002.pdf.
“Invited Presentations (IP)”, exercised on Mar. 22, 2004 at http://arofe.army.mil/Confences/siam—abstract/siam—table—lv1, accessed on Mar. 22, 2004.
“Symbolic dynamics and Markov partitions”, Adler, Roy L., Bulletin, Jan. 1998, available at http://www.ams.org/journals/bull/1998-35-01/S0273-0979-98-00737-X/S0273-0979-98-00737-X.pdf.
Applied Symbolic Dynamics, Hao, Bai-Lin., Chinese Journal of Physics vol. 36, No. 6 Dec. 1998 available at http://psroc.phys.ntu.edu.tw/cjp/v36/753.pdf.
“Detecting direction of coupling in interacting oscillators”, Rosenblum, Michael G.; Pikovsky, Arkady S., Physical Review E (Statistical, Nonlinear, and Soft Matter Physics), vol. 64, Issue 4, Oct. 2001, p. 045202, available at http://photonik.physik.hu-berlin.de/ede.old/literatur—ede.vor06/pre—64—045202—CouplOscis—pikovsky.pdf.
“Symbolic Dynamics”, Tufillaro, Nicholas B., Mar. 3, 1997, available at http://www.drchaos.net/drchaos/Book
ode49.html, accessed on Mar. 5, 2004.
“A Classification One Dimensional Almost Periodic Tilings Obtained By the Projection Method”, Mingo, James A. , Transactions of the American Mathematical Society, vol. 352, No. 11, pp. 5263-5277, Jul. 18, 2000, available at http://www.ams.org/journals/tran/2000-352-11/S0002-9947-00-02620-9/S0002-9947-00-02620-9.pdf, accessed on Mar. 6, 2004.
“Distances of Time Series Componentsby Means of Symbolic Dynamics”, Keller, K., 2004, available at http://stubber.math-inf.uni-greifswald.de/˜keller/wwwpapers/dtsc.pdf.
“Positive K-Theory and Symbolic Dynamics”, Boyle, Mike., Jun. 22, 2001, available at http://www-users.math.umd.edu/˜mmb/papers/k22june01.pdf.
“Symbolic Dynamics for Transition Tori”, Robinson, C., Apr. 21, 2001, available at http://www.math.northwestern.edu/˜clark/preprints/tori/tori.pdf.
“Synth Secrets Synthesizing Strings • PWM & String Sounds”, Reid, Gordon., SOS, Mar. 2003, available at http://www.soundonsound.com/sos/Mar03/articles/synthsecrets47.asp, accessed on May 14, 2007.
“Homoclinic Point”, Weisstein, Eric W., MathWorld—A Wolfram Web Resource, available at http://mathworld.wolfram.com/HomoclinicPoint.html, accessed on Mar. 22, 2004.
Weisstein, Eric W. “Quasiperiodic Motion.” From MathWorld—A Wolfram Web Resource, available at http://mathworld.wolfram.com/QuasiperiodicMotion.html, accessed on Mar. 15, 2004.
Weisstein, Eric W. “Group Cycle.” From MathWorld—A Wolfram Web Resource, available at http://mathworld.wolfram.com/GroupCycle.html, accessed on Mar. 15, 2004.
Rowland, Todd and Weisstein, Eric W. “Group Orbit.” From MathWorld—A Wolfram Web Resource, available at http://mathworld.wolfram.com/GroupOrbit.html, accessed on Mar. 22, 2004.
“Homoclinic and Heteroclinic Points”, Tufillaro, Nicholas B., Mar. 3, 1997, available at http://www.drchaos.net/drchaos/Book
ode120.html, accessed on Mar. 15, 2004.
“Dynamics”, HUT, Institute of mathematics, Mar. 5, 2004, available at http://math.tkk.fi/˜kve/resabs.html, accessed on Mar. 5, 2004.
Schmoyer Craig W.
Tran Khanh C
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