发明名称 |
ADC FOR REMOVING COLUMN FIXED PATTERN NOISE AND CMOS IMAGE SENSOR INCLUDING SAME |
摘要 |
The present invention relates to an ADC for removing fixed pattern noise, in which the ADC comprises: a comparison unit which compares an input voltage (VIN) with a ramp input increasing with a constant slope according to time, and outputs the comparison result to a sync-shift block unit; the sync-shift block unit which shifts a sync signal, on the basis of information for C-FPN removal received from a memory for C-FPN removal and the comparison result of the comparison unit; an n-bit counter which outputs an n-bit digital counter output value to an n-bit memory or a memory for C-FPN removal; the n-bit memory which stores the digital counter output value of the n-bit counter using the shifted sync signal; and the memory for C-FPN removal which provides the sync-shift block unit with the digital counter output value of the n-bit counter corresponding to a reference voltage, wherein the sync signal is a signal used to determine the digital counter output value of the n-bit counter. A difference of conversion characteristics between column ADCs is solved, so that the C-FPN characteristic in a CIS can be removed to implement an improved image. |
申请公布号 |
WO2012074287(A3) |
申请公布日期 |
2012.10.11 |
申请号 |
WO2011KR09198 |
申请日期 |
2011.11.30 |
申请人 |
DONGGUK UNIVERSITY INDUSTRY-ACADEMIC COOPERATION FOUNDATION;SONG, MIN KYU;MOON, JUN HO;KIM, DAE YUN |
发明人 |
SONG, MIN KYU;MOON, JUN HO;KIM, DAE YUN |
分类号 |
H03M1/12;H04N5/378 |
主分类号 |
H03M1/12 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|