Coded data generation or conversion – Analog to or from digital conversion – Differential encoder and/or decoder
Reexamination Certificate
2010-02-18
2011-10-04
Nguyen, Linh (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Differential encoder and/or decoder
C341S144000
Reexamination Certificate
active
08031096
ABSTRACT:
A circuit for a delta-sigma digital-to-analog converter (DAC) includes a first stage with a delta-sigma noise-shaping loop. The first stage is capable of receiving an input signal, includes a first quantizer that has a first quantization error, and provides a first stage output. A first DAC receives the first stage output and provides a first analog output. A second stage receives the first quantization error. The second stage provides a second stage output to the digital differentiator. A second DAC receives a digital differentiator output and provides a second analog output. An adder adds the first analog output and the second analog output to provide a third analog output, so that the first quantization error is cancelled out and the inband noise is suppressed in the third analog output.
REFERENCES:
patent: 5369403 (1994-11-01), Temes et al.
patent: 5621407 (1997-04-01), Jeong et al.
patent: 5870048 (1999-02-01), Kuo et al.
patent: 6340940 (2002-01-01), Melanson
patent: 6369731 (2002-04-01), Takeda et al.
patent: 6369741 (2002-04-01), Demicheli et al.
patent: 6538589 (2003-03-01), Okuda et al.
patent: 6639531 (2003-10-01), Melanson
patent: 6861968 (2005-03-01), Melanson et al.
patent: 6980144 (2005-12-01), Maloberti et al.
patent: 7009540 (2006-03-01), Chen et al.
patent: 7345606 (2008-03-01), Reefman et al.
patent: 7532141 (2009-05-01), Kitahira et al.
patent: 7710300 (2010-05-01), Kwan
patent: 2002/0196169 (2002-12-01), Okuda et al.
patent: 2008/0079619 (2008-04-01), Sakurai et al.
patent: 2008/0180293 (2008-07-01), Kitahira et al.
patent: 2009/0251346 (2009-10-01), Kwan
patent: 2011/0018753 (2011-01-01), Lou et al.
Xu, Xiaofeng, et al., “The Implementation of Dual-Truncation D/A Converters”, Department of Electrical and Computer Engineering, Oregon State University, 1992, IEEE, pp. 597-600.
Lowe Hauptman & Ham & Berner, LLP
Nguyen Linh
Taiwan Semiconductor Manufacturing Company , Ltd.
LandOfFree
High resolution delta-sigma digital-to-analog converter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with High resolution delta-sigma digital-to-analog converter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High resolution delta-sigma digital-to-analog converter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4272549