Digital camera with analog and digital clamp circuit
US6157407A · kind A · utility
25Cited by
8References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 7, 1997 |
| Grant date | Dec 5, 2000 |
| Priority date | — |
| Expiry date | Mar 7, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2209/046
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A digital camera includes a CCD imager, and a CCD output signal from the CCD imager is clamped in an analog clamp area by an analog clamp circuit, and then, converted into a digital signal by an A/D converter. The digital signal is thereafter applied to a clamp level calculation circuit which calculates a clamp level of the digital signal, whereby the digital signal can be subjected to digital clamping by a first subtraction circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.