发明名称 |
A/D converter, solid-state image sensor using plurality of A/D converters and driving method of A/D converter for correcting an offset value of the A/D converter based on a held offset value |
摘要 |
An analog-to-digital converter converts an analog signal into a digital signal by measuring a time period until a magnitude relation between a voltage level of a reference signal that changes along with time and a voltage level of the analog signal is inverted. The converter comprises a holding unit which holds, as a voltage level that is an analog value, an offset value of the analog-to-digital converter upon analog-to-digital converting a reference voltage level by the analog-to-digital converter, wherein the offset value of the analog-to-digital converter is corrected by changing the voltage level of the analog signal by the voltage level of the offset value held by the holding unit. |
申请公布号 |
US8698062(B2) |
申请公布日期 |
2014.04.15 |
申请号 |
US201113114164 |
申请日期 |
2011.05.24 |
申请人 |
YOSHIDA DAISUKE;CANON KABUSHIKI KAISHA |
发明人 |
YOSHIDA DAISUKE |
分类号 |
H01L27/00;H03M1/06;H03M1/12 |
主分类号 |
H01L27/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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