发明名称 |
Threshold voltage compensation for pixel design of CMOS image sensors |
摘要 |
The present disclosure is directed to a CMOS active pixel sensor that compensates for variations in a threshold voltage of a source follower contained therein. A structure in accordance with an embodiment includes: a replica source follower transistor; a system for creating a current in said replica source follower transistor such that a gate-source voltage of said replica source follower is substantially equal to a threshold voltage of said replica source follower; and a current mirror for biasing the isolation source follower transistor at a same current density as the replica source follower transistor.
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申请公布号 |
US7825469(B2) |
申请公布日期 |
2010.11.02 |
申请号 |
US20070850488 |
申请日期 |
2007.09.05 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
ABADEER WAGDI W.;FIFIELD JOHN A. |
分类号 |
H01L29/72 |
主分类号 |
H01L29/72 |
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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