Variable gain and multiplexing in a digital calibration for an analog-to-digital converter
US7812746B2 · kind B2 · utility
4Cited by
22References
38Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 13, 2006 |
| Grant date | Oct 12, 2010 |
| Priority date | — |
| Expiry date | Dec 13, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/1014
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method and apparatus to provide a variable voltage source for calibrating an analog-to-digital converter (ADC) by efficient decoding of a multiplexer control signal. A multiplexer efficiently decodes the multiplexer control signal to provide a variable calibration source that has a high-accuracy digital control. The multiplexer senses the multiplexer control signal and varies only one of a multiplexer first output and a multiplexer second output for a one-bit change in a least significant bit of the multiplexer control signal. Calibrating the ADC with the variable calibration source increases the accuracy of the ADC.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.