Coded data generation or conversion – Analog to or from digital conversion – Differential encoder and/or decoder
Reexamination Certificate
2006-04-25
2006-04-25
Wamsley, Patrick (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Differential encoder and/or decoder
C375S247000, C708S307000
Reexamination Certificate
active
07034728
ABSTRACT:
A delta-sigma modulator. The novel delta-sigma modulator includes one or more filter stages arranged in cascade, wherein each filter stage includes a first circuit for generating a first output signal and second circuit for generating a second output signal; and a summing circuit for adding the first and second output signals from each of the filter stages. In an illustrative embodiment, the first circuit is a bandpass filter including an inductive-capacitive resonator and the second circuit is an integrator, which generates a second output signal that is orthogonal to the first output signal. The output of the summing circuit is digitized and then converted back to analog to provide a feedback signal. The feedback signal is subtracted from an input signal, and the resultant difference signal is input to a first filter stage.
REFERENCES:
patent: 5012244 (1991-04-01), Wellard et al.
patent: 5196850 (1993-03-01), Duffy et al.
patent: 5283578 (1994-02-01), Ribner et al.
patent: 5357252 (1994-10-01), Ledzius et al.
patent: 5414424 (1995-05-01), Cabler
patent: 5446460 (1995-08-01), Cabler
patent: 5500645 (1996-03-01), Ribner et al.
patent: 5585801 (1996-12-01), Thurston
patent: 5629701 (1997-05-01), Ritoniemi et al.
patent: 5729230 (1998-03-01), Jensen et al.
patent: 5732002 (1998-03-01), Lee et al.
patent: 6157329 (2000-12-01), Lee et al.
patent: 6157331 (2000-12-01), Liu et al.
patent: 6225928 (2001-05-01), Green
patent: 6249236 (2001-06-01), Lee et al.
patent: 6396428 (2002-05-01), Cheng
patent: 6483449 (2002-11-01), Gandolfi et al.
patent: 6515604 (2003-02-01), Delano
patent: 6693571 (2004-02-01), Melanson et al.
patent: 6697000 (2004-02-01), LeReverend et al.
patent: 6768435 (2004-07-01), Xu
patent: 6822592 (2004-11-01), Gandolfi et al.
patent: 6911928 (2005-06-01), Orsier et al.
patent: 6943715 (2005-09-01), Radja et al.
Kaplan Todd S.
Luh Louis
Alkov Leonard A.
Raytheon Company
Vick Karl A.
Wamsley Patrick
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