Differential current-mode translator in a sigma-delta digital-to-analog converter
US7903011B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 12, 2007 |
| Grant date | Mar 8, 2011 |
| Priority date | — |
| Expiry date | Aug 30, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/464
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A differential current-mode sigma-delta digital-to-analog converter (SD DAC) and a method for generating positive and negative reference voltages in a sigma-delta digital analog converter are described. The SD DAC includes a low pass filter (LPF) having a first and second input. The SD DAC further includes a first resistance and a second resistance coupled together at a common node. The first resistance may be coupled to the first input of the LPF and the second resistance may be coupled to the second input of the LPF. Additionally, the SD DAC includes a current supply and a switching network for supplying current from the current supply to the first and second resistances. The current supply and the resistances operate to generate a first voltage and a second voltage at the first and second inputs of the LPF.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.