发明授权
- 专利标题： Image pickup apparatus, image pickup system, and method of the image pickup apparatus having pixel array for outputting an analog signal
- 专利标题（中）： 具有用于输出模拟信号的像素阵列的图像拾取装置，图像拾取系统和方法
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申请号： US12607820申请日： 2009-10-28
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公开(公告)号： US08421889B2公开(公告)日： 2013-04-16
- 发明人: Hiroki Hiyama , Masaaki Iwane , Kazuo Yamazaki
- 申请人： Hiroki Hiyama , Masaaki Iwane , Kazuo Yamazaki
- 申请人地址： JP Tokyo
- 专利权人： Canon Kabushiki Kaisha
- 当前专利权人： Canon Kabushiki Kaisha
- 当前专利权人地址： JP Tokyo
- 代理机构： Canon U.S.A., Inc. IP Division
- 优先权： JP2008-281867 20081031
- 主分类号： H04N5/335
- IPC分类号： H04N5/335 ; H01L27/146
摘要：
An apparatus includes a pixel array in which pixels for outputting an analog signal are arranged in a matrix, vertical output lines each of which is connected to pixels in a same column, A/D conversion units, which are individually connected to the vertical output lines, for converting the analog signal into a digital signal, and a constant current supply unit for supplying a constant current to the A/D conversion units. Each of the A/D conversion units includes an integration unit for integrating the constant current, a comparison unit for comparing the integrated constant current with the analog signal and outputting a comparison signal, and a digital signal storage unit for storing a digital signal corresponding to the comparison signal. The integration unit includes an input capacitor for receiving the constant current. The comparison unit is connected to the constant current supply unit via the input capacitor.