Sigma-delta digital-to-analog conversion system and process through reconstruction and resampling
US5748126A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 8, 1996 |
| Grant date | May 5, 1998 |
| Priority date | — |
| Expiry date | Mar 8, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/508
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A conversion system and method is disclosed for converting between digital and analog data signals. The conversion system comprises a signal input line for each digital data signal, a reconstructor-resampler unit for each digital data signal, a combiner, a modulator, a digital-to-analog converter, and a signal output line. Each signal line input couples to the respective reconstructor-resampler unit for the digital data signal. Each reconstructor-resampler unit then couples to a combiner which couples to a modulator. The modulator couples to the digital-to-analog converter that couples to the signal output line from which an analog output signal is produced. The reconstructor-resampler comprises a sampling member coupled to the signal line input and a polynomial interpolator member coupled to the sampling member and the modulator. Also, the modulator operates at a predetermined, or fixed, frequency regardless of the sampling frequency of the digital data signal. The steps of the conversion method include inputting a digital data signal having a sampling frequency, reconstructing and resampling the digital data signal to generate a resampled data signal, performing noise-shaping on …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.