Delta-sigma modulator with feed-forward path
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United States of America Patent
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Feb 24, 2004
Grant Date -
Sep 11, 2003
app pub date -
Aug 2, 2002
filing date -
Mar 8, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A delta-sigma modulator comprising a number of integration stages and having a feed-forward path from a signal input section to the signal path prior to a final integration stage, so as to reduce processing in the majority of integration stages to error processing. A delta-sigma modulator with acceptable dynamic range and incomplete settling can be designed for audio applications using a ratio of gain bandwidth product to sampling frequency in terms of a resolution of the converter. Satisfying the criteria provided by the ratio reduces the gain bandwidth requirement below that previously used as acceptable values in data converter design.
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