A/D converter
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United States of America Patent
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Feb 3, 2009
Grant Date -
Dec 20, 2007
app pub date -
Jun 13, 2007
filing date -
Jun 16, 2006
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An A/D converter that supports multi-mode and that can minimize power consumption is provided. A hybrid A/D converter comprises: hybrid stages composed of 1.5-bit A/D converter for pipeline use that convert analogue input signals into digital signals; 1/1.5-bit D/A converters that switch between pipeline use and delta-sigma modulation use according to the mode in use; analogue adders that subtract output of the 1/1.5 D/A converters from the analogue input signals; and analogue operation circuits that receive as input the output of the analogue adders and function as amplifiers in pipeline mode and as integrators in delta-sigma mode.
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