Calibrating a digital-to-analog converter
US7443323B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 10, 2007 |
| Grant date | Oct 28, 2008 |
| Priority date | — |
| Expiry date | Jan 10, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/66
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Methods and corresponding systems for calibrating a digital-to-analog converter include selecting first and second code regions in the digital-to-analog converter, wherein the first and second code regions are separated by a boundary. Thereafter a waveform sequence is input into the digital-to-analog converter, wherein the waveform sequence has a zero offset at the boundary. Then a relative compensation value between the first and second code regions is adjusted to reduce a distortion in an output of the digital-to-analog converter. A magnitude of a third harmonic distortion of the waveform sequence can be used to measure distortion in the output. Adjusting the relative compensation can include converting the output of the digital-to-analog converter to a digital sequence, filtering the digital sequence, and measuring a harmonic distortion in the digital sequence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.