Continuous-time delta-sigma modulators using distributed resonators
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United States of America Patent
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Aug 7, 2007
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app pub date -
Jun 7, 2006
filing date -
Oct 25, 2004
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Abstract
A distributed resonator or filter in a continuous-time delta-sigma modulator is disclosed, where the transfer function of the resonator or filter repeats every F.sub.s, where F.sub.s is the sampling frequency of the modulator. On one side, like continuous-time delta-sigma modulators, the disclosed modulator does not require a high-precision track-and-hold, and additionally can take advantage of the high Q of distributed resonators. On the other side, like discrete-time delta-sigma modulators, the disclosed modulator is insensitive to feedback loop delays and can subsample.
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