Sub-range flash analog-to-digital converter
US5973632A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 3, 1998 |
| Grant date | Oct 26, 1999 |
| Priority date | — |
| Expiry date | Mar 3, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/145
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A sub-range flash ADC having correction circuits for dealing with conversion errors induced by the coarse comparison in the thermal code format. Fine thermal codes accompanied by extension codes may be used to decide whether a conversion error has happened and what kind of conversion error it is. After determining whether a conversion error has occurred, the coarse thermal codes are shifted right or left by one bit, similar to the addition or subtraction mathematical operation, to obtain corrected coarse thermal codes. In addition, the fine thermal codes (including the extension thermal codes) are shifted left or right by a bit length equal to the fine thermal codes, similar to the subtraction and addition operation, to obtain corrected fine thermal codes. These corrected coarse and fine thermal codes can be directly used for encoding without any further correction process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.