Sigma-delta analog to digital converter
US5392039A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 21, 1992 |
| Grant date | Feb 21, 1995 |
| Priority date | — |
| Expiry date | May 21, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/454
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An analog-to-digital converter has an input for receiving analog signals, a quantizer for producing a digital output of the converter, a first combining node for combining the analog input with a first feedback signal derived from the digital output and producing a first combined signal, and filter circuitry for filtering the first combined signal. The filter circuitry includes at least one filter circuit stage which is not connected to a phase-modifying resistance, and a second combining node for combining an output from the at least one filter circuit stage with a second feedback signal derived from the digital output, and produces a signal for input to the quantizer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.