A/D converter
US7830295B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 21, 2009 |
| Grant date | Nov 9, 2010 |
| Priority date | — |
| Expiry date | Apr 28, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/468
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In an A/D converter, three capacitors are connected to a comparator. The A/D converter also includes three switching circuits that each input a first reference voltage, a second reference voltage, and a third reference voltage in the three capacitors. A control circuit selects at least two of the three switching circuits during a charging period of stray capacitance of each of the capacitors. The control circuit turns on one of the switching devices in the selected switching circuits simultaneously, and during a comparing period by the comparator, selects one of the three capacitors for each comparison, and selects another capacitor in the next comparison.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.