Ramp signal generator, analog to digital converter, and image sensor
US8482448B2 · kind B2 · utility
6Cited by
5References
19Claims
0Family size
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Key dates
| Filing date | Jun 21, 2011 |
| Grant date | Jul 9, 2013 |
| Priority date | — |
| Expiry date | Aug 3, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/56
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Provided is an analog-to-digital (A/D) converter that may be used in an image sensor and a ramp signal generator that is used in an A/D converter. The ramp signal generator may generate a ramp signal and a reference voltage signal that include noise that has same noise characteristics that are input into the ramp signal, such that the signal to noise ratio (SNR) is improved and the image quality is also improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.