发明授权
US07189953B2 Signal processing circuit, image sensor IC, and signal processing method
有权
信号处理电路，图像传感器IC和信号处理方法
- 专利标题： Signal processing circuit, image sensor IC, and signal processing method
- 专利标题（中）： 信号处理电路，图像传感器IC和信号处理方法
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申请号： US10784494申请日： 2004-02-23
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公开(公告)号： US07189953B2公开(公告)日： 2007-03-13
- 发明人: Satoshi Machida
- 申请人： Satoshi Machida
- 申请人地址： JP
- 专利权人： Seiko Instruments Inc.
- 当前专利权人： Seiko Instruments Inc.
- 当前专利权人地址： JP
- 代理机构： Adams & Wilks
- 优先权： JP2003-049573 20030226; JP2003-049574 20030226; JP2003-149268 20030527; JP2004-023097 20040130
- 主分类号： H01L27/00
- IPC分类号： H01L27/00
摘要：
A signal processing circuit has a sample/hold circuit for sampling an input signal comprised of a first signal and a second signal and for holding the first signal. The first signal comprises an optical signal obtained due to storage of electric charges generated due to light incident upon a photoelectric converter, and the second signal comprises a reference signal obtained due to resetting of the photoelectric converter. A subtracter receives an output signal of the sample/hold circuit and the input signal and obtains a difference between the output signal of the sample/hold circuit and the input signal. A voltage clamp circuit clamps a part or all of an output signal from the subtracter.