Coded data generation or conversion – Analog to or from digital conversion – Differential encoder and/or decoder
Reexamination Certificate
2005-12-06
2005-12-06
Mai, Lam T. (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Differential encoder and/or decoder
C341S172000, C341S161000
Reexamination Certificate
active
06972705
ABSTRACT:
Signal processing systems described herein include an analog-to-digital delta sigma modulator to process a single-ended input signal using a single-ended analog feedback reference signal. The delta sigma modulator includes a switched capacitor circuit that integrates a difference between the single-ended input signal and the single-ended analog feedback signal derived from a quantization output of the delta sigma modulator. Embodiments of the switched capacitor circuit allow the delta sigma modulator to be implemented with fewer switches, less complicated reference signal generators, and smaller capacitors relative to conventional counterparts. Thus, embodiments of the delta sigma modulator described herein can cost less to build and use less power. Embodiments of the signal processing systems can be implemented in single and multi-bit delta sigma modulators and various sampling topologies, including single and double sampling topologies.
REFERENCES:
patent: 6111529 (2000-08-01), Maulik et al.
patent: 6147631 (2000-11-01), Maulik et al.
patent: 6172630 (2001-01-01), Nelson
patent: 6369729 (2002-04-01), Srinivasan et al.
patent: 6522278 (2003-02-01), Rhode et al.
patent: 6556159 (2003-04-01), Fei et al.
patent: 6583662 (2003-06-01), Lim
patent: 6653967 (2003-11-01), Hamashita
patent: 6724332 (2004-04-01), Melanson
patent: 6768443 (2004-07-01), Willis
B.E. Bosser et al., “The Design of Sigma-Delta Modulations Analog-to-Digital Converters”, IEEE Journal of Solid-State Circuits, Dec. 1998, pp. 1298-1307.
D. Johns et al., “Analog Integrated Circuit Design”, John Wiley & sons Inc., p. 543 “No Month” “No Year”.
Fei Xiaofan
Gaboriau Johann
Melanson John L.
Chambers Kent B.
Cirrus Logic Inc.
Hamilton & Terrile LLP
Mai Lam T.
LandOfFree
Signal processing system having an ADC delta-sigma 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 Signal processing system having an ADC delta-sigma modulator..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Signal processing system having an ADC delta-sigma modulator... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3521880