Feedforward delta-sigma modulator
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United States of America Patent
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May 19, 2015
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app pub date -
Jul 16, 2014
filing date -
Jul 18, 2013
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Abstract
A feedforward delta-sigma modulator includes a successive approximation analog-to-digital converter, a digital-to-analog converter, N integrators, a first adder, a second adder, and an optimization zero generation unit, where N is a positive integer. An output terminal of each integrator of the N integrators is coupled to the successive approximation analog-to-digital converter. The digital-to-analog converter is coupled between the first adder and the successive approximation analog-to-digital converter. The first adder is coupled to an input terminal of a first integrator of the N integrator. The second adder is coupled to an input terminal of a Kth integrator of the N integrators, where K is a positive integer. The optimization zero generation unit is coupled between an output terminal of a (K+1)th integrator of the N integrators and the second adder.
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