Coded data generation or conversion – Analog to or from digital conversion – Differential encoder and/or decoder
Reexamination Certificate
2011-07-19
2011-07-19
JeanPierre, Peguy (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Differential encoder and/or decoder
C341S133000
Reexamination Certificate
active
07982646
ABSTRACT:
A second order superconductor delta-sigma analog-to-digital modulator having an input for receiving an analog signal, a first integrator coupled to the input, a second integrator cascaded with the first integrator, and a quantum comparator digitizing output from the second integrator reduces quantization noise by providing matched quantum accurate DACs in a feedback loop between output from the quantum comparator and input to the first integrator. The matched quantum accurate feedback DACs produce identically repeatable voltage pulses, may be configured for multi-bit output, may be time-interleaved to permit higher clocking rates, and may be employed in a balanced bipolar configuration to allow inductive input coupling. Bipolar feedback is balanced when gain of a first DAC exceeds gain of a matched, opposite polarity DAC by the amount of implicit feedback from the comparator into the second integrator.
REFERENCES:
patent: 4117354 (1978-09-01), Geewala
patent: 4916335 (1990-04-01), Goto et al.
patent: 4947118 (1990-08-01), Fujimaki
patent: 5099152 (1992-03-01), Suzuki
patent: 5140324 (1992-08-01), Przybysz et al.
patent: 5309038 (1994-05-01), Harada et al.
patent: 6157329 (2000-12-01), Lee et al.
patent: 6188236 (2001-02-01), Wikborg
patent: 6507234 (2003-01-01), Johnson et al.
patent: 6509853 (2003-01-01), Gupta
patent: 6518786 (2003-02-01), Herr
patent: 6549059 (2003-04-01), Johnson
patent: 6608581 (2003-08-01), Semenov
patent: 6724216 (2004-04-01), Suzuki et al.
patent: 6750794 (2004-06-01), Durand et al.
patent: 6865639 (2005-03-01), Herr
patent: 6960780 (2005-11-01), Blais et al.
patent: 7038604 (2006-05-01), Hirano et al.
patent: 7064697 (2006-06-01), Taylor et al.
patent: 7227480 (2007-06-01), Furuta et al.
patent: 7375666 (2008-05-01), Melanson
patent: 7495593 (2009-02-01), Wang
patent: 7498832 (2009-03-01), Baumgardner et al.
patent: 7719453 (2010-05-01), Kim et al.
patent: 2002/0063643 (2002-05-01), Smith et al.
patent: 2002/0190381 (2002-12-01), Herr et al.
patent: 2003/0011398 (2003-01-01), Herr
patent: 2003/0016069 (2003-01-01), Furuta et al.
patent: 2003/0039138 (2003-02-01), Herr
patent: 2003/0040440 (2003-02-01), Wire et al.
patent: 2003/0115401 (2003-06-01), Herr
patent: 2003/0183935 (2003-10-01), Herr et al.
patent: 2004/0120444 (2004-06-01), Herr
patent: 2004/0201099 (2004-10-01), Herr
patent: 2004/0201400 (2004-10-01), Herr
patent: 2005/0001209 (2005-01-01), Hilton et al.
patent: 2005/0023518 (2005-02-01), Herr
patent: 2005/0078022 (2005-04-01), Hirano et al.
patent: 2005/0110106 (2005-05-01), Goto et al.
patent: 2005/0224784 (2005-10-01), Amin et al.
patent: 2008/0129368 (2008-06-01), Furuta et al.
patent: 0467104 (1902-01-01), None
patent: WO 2005/093649 (2005-10-01), None
patent: PCT/US2008/072017 (2008-08-01), None
U.S. Appl. No. 11/634,632, filed Jan. 2007, Herr.
Berns et al., “Coherent Quasiclassical Dynamics of a Persistent Current Qubit”,Physical Review Letters APS USA, vol. 97, No. 15, pp. 150502, Oct. 13, 2006.
Garanin et al., Effects of nonlinear sweep in the Landau-Zener-Stueckelberg effect,Physical Review B, vol. 66, No. 17, pp. 174438-1-174438-11, Nov. 1, 2002.
Wulf et al., Dressed States of Josephson Phase Qubit Coupled to an LC Circuit,IEEE Transaction on Applied Superconductivity IEEE USA, vol. 15, No. 2, pp. 856-859, Jun. 2, 2005.
International Search Report for International Application No. PCT/US2008/050864; European Patent Office, May 30, 2008; 3 pages.
Miller et al.: “Flux Quantum Sigma-Delta Analog-to-Digital Converters for RF Signals”; IEEE Transactions on Applied Superconductivity, IEEE Service Center, Los Alamitos, CA US, vol. 9, No. 2, Jun. 1, 1999, XP011005528, ISSN: 1051-8223.
International Search Report for corresponding PCT/US2009/052107, mailed Dec. 30, 2009 by Henk Beindorff of the EPO.
Herr Quentin P.
Miller Donald L.
Pesetski Aaron A.
Przybysz John X.
Jean-Pierre Peguy
Northrop Grumman Systems Corporation
Tarolli, Sundheim Covell & Tummino LLP
LandOfFree
Method and apparatus for matched quantum accurate feedback DACs 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 matched quantum accurate feedback DACs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for matched quantum accurate feedback DACs will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2740744