Analog-to-digital converter and calibration method thereof and calibration apparatus
US10333539B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 26, 2018 |
| Grant date | Jun 25, 2019 |
| Priority date | — |
| Expiry date | Jul 26, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/804
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A calibration method includes the following: providing a first charge quantity to a first input terminal of a comparator; providing a second charge quantity to a second input terminal of the comparator by one of multiple switch capacitor groups, and providing a compensation charge quantity to the second input terminal of the comparator by at least another one of the switch capacitor groups; comparing a voltage value received by the first input terminal and a voltage value received by the second input terminal, and outputting a voltage comparison result to a controller; and if the controller determines the charge quantity provided to the second input terminal approximates to the charge quantity provided to the first input terminal based on the voltage comparison result, recording a calibration charge quantity in a lookup table stored by the controller. An analog-to-digital converter and a calibration apparatus are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.