Self-calibrating continuous-time delta-sigma modulator

Details Self-calibrating continuous-time delta-sigma modulator Self-calibrating continuous-time delta-sigma modulator

2008-01-29

2008-01-29

Nguyen, Khai M. (Department: 2819)

Coded data generation or conversion

Converter calibration or testing

C341S118000, C341S131000, C341S143000

Reexamination Certificate

active

07324028

ABSTRACT:
A self-calibrating continuous-time delta-sigma modulator determines whether time constants of its internal integrators are too large or too small by injecting a calibrating sequence into the modulator and examining a correlation between the calibrating sequence and a modulator output sequence. Then the time constants of the internal integrators are adjusted accordingly. In one embodiment, the correlation is exploited based on matching a noise transfer function of the modulator using an adaptive filter based on a least mean square (LMS) algorithm.

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