Analog to Digital Converters, Image Sensor Systems, and Methods of Operating the Same
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    发明申请
    Analog to Digital Converters, Image Sensor Systems, and Methods of Operating the Same 有权
    模数转换器,图像传感器系统及其操作方法

    公开(公告)号:US20120113286A1

    公开(公告)日:2012-05-10

    申请号:US13270968

    申请日:2011-10-11

    IPC分类号: H04N5/228 H03M1/12

    CPC分类号: H03M1/144 H03M1/56 H04N5/378

    摘要: An analog to digital converter (ADC) can include a multi-input comparison unit configured to compare a pixel voltage from an image sensor, a comparison voltage comprising a stepped voltage modified during a coarse mode of operation, and a ramp voltage comprising a ramped voltage modified to one another during a fine mode of operation, to provide a comparison result signal that indicates whether the comparison voltage combined with the ramp voltage is greater than or less than the pixel voltage. A selection control signal generation unit can receive the comparison result signal and a mode control signal, to indicate the coarse or fine mode, to provide a selection control signal allowing modification of the comparison voltage in the coarse mode and to hold the comparison voltage constant in the fine mode. A reference voltage selection unit can receive the selection control signal to control modification of the comparison voltage.

    摘要翻译: 模数转换器(ADC)可以包括多输入比较单元,其被配置为比较来自图像传感器的像素电压,包括在粗略操作模式期间修改的阶梯电压的比较电压和包括斜坡电压的斜坡电压 在精细操作模式下彼此修改,以提供指示与斜坡电压组合的比较电压是否大于或小于像素电压的比较结果信号。 选择控制信号生成单元可以接收比较结果信号和模式控制信号,以指示粗略或精细模式,以提供允许修改粗略模式中的比较电压并且保持比较电压恒定的选择控制信号 精细模式。 参考电压选择单元可以接收选择控制信号以控制比较电压的修改。