Bi-polar signaling scheme for imaging system
US7683947B2 · kind B2 · utility
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9Claims
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Key dates
| Filing date | Jan 31, 2007 |
| Grant date | Mar 23, 2010 |
| Priority date | — |
| Expiry date | May 2, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/65
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus for providing amplified image data may include an image sensor including a number of pixel light sensing elements. Circuitry may output pixel exposure signals and a dark level signal. The differences between the pixel exposure signals and the dark level signal are uni-polar signals. A variable gain amplifier may shift the uni-polar signals to bipolar signals centered around zero, and may also amplify the bipolar signals. In this manner, a full scale output range of the variable gain amplifier may be substantially utilized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.