Sigma-delta digital-to-analog converter
US8692700B2 · kind B2 · utility
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15References
19Claims
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Key dates
| Filing date | May 2, 2012 |
| Grant date | Apr 8, 2014 |
| Priority date | — |
| Expiry date | May 2, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/50
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A sigma-delta digital-to-analog converter (SD DAC) exhibits undesirable distortion when implemented in an integrated circuit due to the non-linearity of polysilicon resistors used in the filtering stages of the SD DAC. By using resistors other than polysilicon for the output resistor of an SD DAC, distortion can be reduced or eliminated. Additionally or alternatively, by generating an error correction signal, the distortion can be corrected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.