Feedback in noise shaping control loop

The present application describes an apparatus and method for improving the performance of modulators functioning as ADCs. In one embodiment, the modulator comprises a plurality of quantizers operating in a round-robin fashion, rather than the single quantizer of the prior art. The use of multiple q...

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Bibliographic Details
Main Authors FORMAN DUSTIN DALE, MALLINSON A. MARTIN
Format Patent
LanguageEnglish
Published 15.04.2014
Subjects
BASIC ELECTRONIC CIRCUITRY
CODE CONVERSION IN GENERAL
CODING
DECODING
ELECTRICITY
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Summary:The present application describes an apparatus and method for improving the performance of modulators functioning as ADCs. In one embodiment, the modulator comprises a plurality of quantizers operating in a round-robin fashion, rather than the single quantizer of the prior art. The use of multiple quantizers allows the modulator to appear to be functioning at a significantly higher rate than a single quantizer allows. In another embodiment, a second-order modulator contains a plurality of control loops, rather than the single control loop of the prior art. The use of multiple control loops allows the modulator to have multiple points of maximum signal-to-noise ratio rather than a single such point as in prior art modulators.
Bibliography:Application Number: US201213665801