公开(公告)号：US20080129570A1

公开(公告)日：2008-06-05

申请号：US11872850

申请日：2007-10-16

申请人： Seung-Hyun LIM ,  Jeong-Hwan LEE ,  Gun-Hee HAN ,  Seog-Hoon HAM

发明人： Seung-Hyun LIM ,  Jeong-Hwan LEE ,  Gun-Hee HAN ,  Seog-Hoon HAM

IPC分类号： H03M1/12

CPC分类号： H03M1/1245 ,  H03M1/403 ,  H04N5/3575

摘要： The invention is directed generally to a correlated double-sampling (CDS) circuit using a smaller number of capacitors than conventional circuits. In embodiments of the invention, a first portion of the CDS circuit uses just two capacitors to sample the reset voltage, amplify the sampled reset voltage, and subtract a first reference voltage from the amplified reset voltage. A second portion of the CDS circuit uses just two capacitors to sample the signal voltage, amplify the sampled signal voltage, and subtract a second reference voltage from the amplified signal voltage. Embodiments of the invention also provide a cyclic analog-to-digital converter (ADC) including the CDS circuit.

摘要翻译： 本发明一般涉及使用比常规电路更少数量的电容器的相关双采样（CDS）电路。 在本发明的实施例中，CDS电路的第一部分仅使用两个电容器对复位电压进行采样，放大采样的复位电压，并从放大的复位电压中减去第一参考电压。 CDS电路的第二部分仅使用两个电容器对信号电压进行采样，放大采样信号电压，并从放大的信号电压中减去第二参考电压。 本发明的实施例还提供了包括CDS电路的循环模数转换器（ADC）。

公开(公告)号：US20120113286A1

公开(公告)日：2012-05-10

申请号：US13270968

申请日：2011-10-11

申请人： Seung-Hyun LIM ,  Kwi-Sung YOO ,  Kyoung-Min KOH ,  Yu-Jin PARK ,  Chi-Ho HWANG ,  Yong LIM

发明人： Seung-Hyun LIM ,  Kwi-Sung YOO ,  Kyoung-Min KOH ,  Yu-Jin PARK ,  Chi-Ho HWANG ,  Yong LIM

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。