Analog signal processor for electronic imaging system providing highly accurate reproduction of images
US5276508A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 5, 1992 |
| Grant date | Jan 4, 1994 |
| Priority date | — |
| Expiry date | Nov 5, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/148
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An electronic imaging system employes a linear charge coupled device (CCD) imaging unit and a unique analog signal processor (ASP) implemented on a single integrated circuit chip. The ASP has a plurality of matched signal channels for receiving respective pixel image signals from the CCD unit and for providing respective color-component image signals, such as red, green and blue color-components, having amplitude balance and accurately referenced "zero" levels. The ASP also has a plurality of matched multiplexing units which directly combine the separate color-component signals from the signal channels into a single full color output image signal with the color components in timed sequence. The output signal from the ASP is applied to an analog to digital (A/D) converter and then to a digital signal processor (DSP). By virtue of its unique design, the ASP has a dynamic range of greater than 12-bits with an output signal frequency as high as 20 MHz for high throughput rates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.