Method and apparatus for operating a delta sigma ADC circuit

Details Method and apparatus for operating a delta sigma ADC circuit Method and apparatus for operating a delta sigma ADC circuit

2006-10-31

2006-10-31

Jeanglaude, Jean Bruner (Department: 2819)

Coded data generation or conversion

Converter compensation

C341S155000, C341S143000

Reexamination Certificate

active

07129866

ABSTRACT:
An analog-to-digital converter (ADC) system that converts an analog input signal into a digital output circuit includes a first stage analog-to-digital converter circuit coupled with a second stage analog-to-digital converter circuit. The first stage analog-to-digital converter circuit includes a quantizer, comparator, integrator, and a feedback digital-to-analog converter (DAC). The second stage analog-to-digital converter circuit includes a backend ADC that further quantizes the integrator output. Furthermore, the first stage analog-to-digital converter circuit also includes redundancy that corrects comparator offsets and prevents nonlinearities and harmonic distortion in the second stage analog-to-digital converter circuit caused by uncorrected comparator offsets.

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