Digital to analogue converter with dynamic element matching
US6583742B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 25, 2000 |
| Grant date | Jun 24, 2003 |
| Priority date | — |
| Expiry date | Oct 25, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/464
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A digital to analogue converter (DAC) system (30) is described which has a plurality of weighting elements (40) where some of the weighting elements have a different nominal weight from other elements. In a preferred arrangement pairs of elements with the same nominal weight are combined, with each pair of elements having more than two output states. A selection unit is coupled to the elements and an adder is coupled to the selection unit to sum the outputs of the weighted elements. In use, the DAC system receives a digital signal and the selection unit determines the output state of each element combination to provide values of the weighted elements which, when summed, are equivalent to the digital signal. The selection unit also determines the output state of each element in each element combination to minimise errors. An analogue to digital (A/D) converter (200) based on the DAC is also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.