Structures and methods that improve the linearity of analog-to-digital converters with introduced nonlinearities
US6778126B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 21, 2002 |
| Grant date | Aug 17, 2004 |
| Priority date | — |
| Expiry date | Nov 21, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/442
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Analog-to-digital converter (ADC) structures and methods are provided that reduce an initial converter nonlinearity by introducing an inverse nonlinearity into the converter's response that is substantially the inverse of the initial converter nonlinearity. In a pipelined ADC embodiment, for example, upstream converter stages are selected that generate an upstream digital code which defines sufficient upstream code words to designate respective segments of the inverse nonlinearity. In response to each of the upstream code words, the conversion gain of the remaining downstream converter stages is then sufficiently adjusted to insert the inverse nonlinearity into the converter response.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.