Multi-bit sigma-delta analog to digital converter with a variable full scale

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United States of America Patent

PATENT NO 6567025
APP PUB NO 20020105449A1
SERIAL NO

10071983

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Abstract

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A multi-bit sigma-delta analog to digital converter has a quantizer, a loop filter circuit, and a digital to analog feedback circuit. The quantizer, loop filter, and digital to analog feedback circuit have a loop gain associated therewith. The quantizer and loop filter have a combined gain associated therewith. The full-scale of the digital to analog feedback circuit is varied. The combined gain of the quantizer and loop filter is also varied. More specifically, the combined gain of the quantizer and loop filter is varied in inverse proportion to the full-scale of the digital to analog feedback circuit to maintain the loop gain at a substantially constant level.

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Patent Owner(s)

Patent OwnerAddress
ANALOG DEVICES INCONE TECHNOLOGY WAY NORWOOD MA 02062

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Lloyd, Jennifer A North Andover, MA 3 38
Schreier, Richard North Andover, MA 7 96
Singer, Lawrence Bedford, MA 8 232

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