Calibration method, A/D converter, and radio device
US7940200B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 2009 |
| Grant date | May 10, 2011 |
| Priority date | — |
| Expiry date | Dec 14, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/745
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
There is disclosed a calibration method for an A/D converter. The A/D converter includes a first amplifier to amplify first and second voltage signals, a second amplifier to amplify the first and second voltage signals amplified by the first amplifier, and a comparator to compare the first and second voltage signals amplified by the second amplifier. The calibration method performs short-circuiting input ports of the second amplifier, comparing the first and second voltage signals inputted to the comparator to obtain a first result, calibrating output voltage of the second amplifier according to the first result, short-circuiting input ports of the first amplifier, opening the short-circuited input ports of the second amplifier, comparing the first and second voltage signals inputted to the comparator to obtain a second result, and calibrating output voltage of the first amplifier according to the second result.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.