Low resolution, high linearity digital-to-analog converter without trim
US5534863A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 6, 1994 |
| Grant date | Jul 9, 1996 |
| Priority date | — |
| Expiry date | Jan 6, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/822
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A digital-to-analog (D/A) converter eliminates matching requirements and does not generate harmonics or noise. The D/A converter has an array of injectors for converting an input word to an analog voltage. A plurality of clocked switches discharge the injector array and the feedback path when switched into a first phase position and transfer the injector signal across the feedback path to the output of the D/A converter when switched to a second phase position. The conversion period, the time in which the digital input word is converted to an analog output voltage, is divided into N-1 subperiods. Each injector is enabled once or not at all for each subperiod such that the weighted signal injected during a single conversion period is constant and such that all the injectors in the array contribute an equal amount of signal during a conversion period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.