Cascade A/D converter
US6965338B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 2004 |
| Grant date | Nov 15, 2005 |
| Priority date | — |
| Expiry date | Nov 19, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/44
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A cascade A/D converter that has shorter settling time and enables high-speed operation is provided. A cascade A/D converter comprises fundamental constituent elements cascaded in plural stages, each fundamental constituent element comprising a first comparator for inputting an analog input signal, a D/A converter for converting an output of the first comparator to an analog signal again, and a subtractor for subtracting an output of the D/A converter from the analog input signal, the fundamental constituent elements comprising: a second comparator for inputting the analog input signal every least significant bit near a transition point of the first comparator; and an arithmetic operating unit for generating upper bits based on an output of the first comparator and interpolating lower bits based on an output of the second comparator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.