On-focal-plane analog-to-digital conversion for current-mode imaging devices
US5886659A · kind A · utility
221Cited by
1References
12Claims
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Key dates
| Filing date | Aug 21, 1997 |
| Grant date | Mar 23, 1999 |
| Priority date | — |
| Expiry date | Aug 21, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/418
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A current-mode analog-to-digital converter based on a current copier circuit with a constant bias current that is independent of the input signals. A second-order incremental .SIGMA.-.DELTA. conversion configuration is implemented. An array of such analog-to-digital converters can be integrated onto the focal plane of an imaging sensor array to achieve column-wise parallel analog-to-digital conversion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.