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US 7,609,303 B1Granted
Low noise active pixel image sensor using a modified reset value
AssigneeMelexis Tessenderlo NV
InventorsHae-Seung Lee, Keith G. Fife
Life of this patent
Estimating the term…
Abstract
A method and apparatus to perform low noise reset of a pixel circuit within an active pixel image sensor.
Claims34
An apparatus, comprising:
- a pixel circuit to detect incident light and integrate an integration value during an integration period;
- a rest circuit to generate multiple reset values during a single reset period, said multiple reset values being applied to said pixel circuit during said single reset period;
- and
- an averaging module coupled to the pixel circuit to sample the integration value and to sample said multiple reset values applied to said pixel circuit during said single reset period;
- said averaging module generating a modified reset value from said multiple reset values applied to said pixel circuit during said single reset period.
2 more elements
A method, comprising:
- sampling an integration value from a pixel circuit, the integration value corresponding to a first frame;
- generating multiple reset values during a single reset period, the multiple reset values being applied to the pixel circuit during the single reset period;
- sampling the multiple reset values being applied to the pixel circuit during the single reset period, the multiple reset values being applied to the pixel circuit during the single reset period corresponding to a subsequent frame;
- and
- generating a modified reset value from the sampled multiple reset values being applied to the pixel circuit during the single reset period.
2 more elements
Dependencies are inferred from the claim text.