Method and apparatus for operating a delta sigma ADC circuit
US7129866B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 10, 2005 |
| Grant date | Oct 31, 2006 |
| Priority date | — |
| Expiry date | Jun 10, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/416
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.