Coded data generation or conversion – Analog to or from digital conversion – Digital to analog conversion
Patent
1997-09-25
1999-11-02
Williams, Howard L.
Coded data generation or conversion
Analog to or from digital conversion
Digital to analog conversion
341143, H03M 300
Patent
active
059778997
ABSTRACT:
A segmentation circuit includes a digital noise shaper responsive to a stream of digital input words for producing a stream of first digital subwords, and a subtractor for subtracting each of the first digital subwords from a corresponding one of the digital input words to produce a stream of second digital subwords that are noise-shaped. The first and second digital subwords have smaller word lengths than the digital input words. The sum of each of the first and second subwords is equal to the corresponding digital input word. When the digital input words are noise-shaped, the first and second digital subwords are both noise-shaped. The segmentation circuit may be used in a noise-shaping digital-to-analog converter having a multi-bit loop quantizer.
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patent: 5684482 (1997-11-01), Galton
X Xu et al, "The Implementation of Dual -Truncation .SIGMA. .DELTA. D/A Converters," IFFF Circuits & Sys.J., 1992, 4 pp.
Analog Devices Inc.
Williams Howard L.
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