The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 03, 2005
Filed:
May. 21, 2004
Applicants:
Peter Kiss, Morristown, NJ (US);
Jesus Arias, Valladolid, ES;
Dandan LI, San Diego, CA (US);
Inventors:
Assignee:
Agere Systems Inc., Allentown, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03M003/00 ;
U.S. Cl.
CPC ...
Abstract
Stable, robust, and high-resolution delta-sigma error feedback modulators, such as those used in digital-to-analog converters and phase-locked loops, include an L-order noise transfer function that is provided with L+1 high-order bits from a truncation element. The stability of such delta-sigma error feedback modulators is independent of the input signal. Moreover, the out-of-band gain of the noise transfer function need not be limited, which improves the resolution and the signal-to-noise ratio of the in-band signal.