Reduced area digital sigma-delta modulator

Details Reduced area digital sigma-delta modulator Reduced area digital sigma-delta modulator

2007-02-13

2007-02-13

Nguyen, Linh (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

C341S131000, C341S118000

Reexamination Certificate

active

11242685

ABSTRACT:
A digital sigma-delta modulator requiring minimal die area and dissipating minimal power is formed with a plurality of integration stages coupled in tandem between an input node and an output node. The bit width of signals in the integration stages is progressively reduced from the first to the last integration stage without compromising modulator accuracy. A quantizer between the last integration stage and the output node provides the final reduction of signal bit width. The gain of the modulator feedforward and feedback paths are integer powers of two to further simplify the digital computation. In an exemplary implementation, three integration stages to form a third-order modulator are coupled in tandem between the input node and the output node. The gains of feedback and feedforward paths in one preferred embodiment are unity, and in some embodiments, one feedforward path has gain of 0.5.

REFERENCES:
patent: 5191331 (1993-03-01), Karema et al.
patent: 5742246 (1998-04-01), Kuo et al.
patent: 5757301 (1998-05-01), Kuo et al.
patent: 5805093 (1998-09-01), Heikkila et al.
patent: 5880687 (1999-03-01), May et al.
patent: 5949361 (1999-09-01), Fischer et al.
patent: 6107947 (2000-08-01), Lyden
patent: 6501406 (2002-12-01), Mecchia et al.
patent: 7049990 (2006-05-01), Ranganathan
patent: 2005/0093726 (2005-05-01), Hezar et al.
Riley, T. A. D. et al., “Delta-Sigma Modulation in Fractional-NFrequency Synthesis”, IEEE Journal of Solid-State Circuits, May 1993, pp. 553-559, vol. 28, No. 5.

Affiliated with

Also associated with

Rating

Reduced area digital sigma-delta modulator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Reduced area digital sigma-delta modulator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reduced area digital sigma-delta modulator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3889966