Reference circuit suitable for use with an analog to digital converter and an analog to digital converter including such a reference circuit
US8552897B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 22, 2012 |
| Grant date | Oct 8, 2013 |
| Priority date | — |
| Expiry date | Mar 30, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/45
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A reference circuit for use with a charge redistribution analog to digital converter, having a capacitor array, the reference circuit comprising: an input for receiving a signal; an output for supplying a reference voltage to at least one capacitor of the charge redistribution capacitor array; a storage capacitor for storing the reference voltage; a voltage modification circuit for comparing the reference voltage stored on the storage capacitor with the reference signal, and based on the comparison to supply a correction so as to reduce a difference between the reference voltage and the reference signal, the correction being applied during a correction phase; and a first switch for selectively connecting the storage capacitor to the input during an acquisition phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.