Apparatus and method for offset voltage correction in an analog to digital converter
US4799042A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 1, 1986 |
| Grant date | Jan 17, 1989 |
| Priority date | — |
| Expiry date | Dec 1, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/804
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A charge redistribution analog-to-digital converter is described that permits their ncorporation of offset voltage correction to provide an accurate reflection in the digitalized output signal of the analog input signal. In a distributed capacitor successive approximation device, additional capacitors are added both to a most significant bit array group of capacitors and to a least significant array group of capacitors that are used in conjunction with the offset voltage. The value of the offset voltage is stored in a register and the register determines various switch positions that determine the value of the offset voltage incorporated in the final output voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.