Analog-to-digital converter using variable counting interval and image sensor including same
US8946616B2 · kind B2 · utility
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Key dates
| Filing date | Oct 19, 2011 |
| Grant date | Feb 3, 2015 |
| Priority date | — |
| Expiry date | Mar 13, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/56
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An analog-to-digital converter (ADC) within an image sensor includes a comparator comparing a ramp signal with an image signal, and a counter generating a count result in response to the comparison by counting a clock during a counting interval. The ADC determines whether a first counting interval for the counter is less than a reference interval, and if the first counting interval is less than the reference interval the counting interval is a first counting interval, else the counting interval is a second counting interval.
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