MULTIPLEXED SIGMA DELTA MODULATOR
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United States of America Patent
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Issued Date -
Aug 7, 2014
app pub date -
Feb 4, 2014
filing date -
Feb 6, 2013
priority date (Note) -
Abandoned
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Abstract
A multiplexed sigma delta modulator constituted of: a control circuitry; a multiplexer responsive to the control circuitry and arranged to receive a plurality of input signals; a comparing circuit, a first input of the comparing circuit coupled to the output of the multiplexer; an integrator, the input of the integrator coupled to the output of the comparing circuit; a latched comparing circuit, one input of the latched comparing circuit coupled to the output of the integrator; a plurality of storage elements, each associated with one of the plurality of inputs; and a feedback circuit arranged to feedback the output of the latched comparing circuit to the second input of the comparing circuit, wherein the control circuitry is further arranged to store the charge of an element of the integrator on the associated storage element when the associated signal is not passed by the multiplexer to the output of the multiplexer.
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