公开(公告)号：US20110043676A1

公开(公告)日：2011-02-24

申请号：US12828478

申请日：2010-07-01

申请人： Seung hyun LIM ,  Jeong hwan LEE ,  Kun hee CHO ,  Gun Hee HAN ,  Kwi Sung YOO ,  Seog heon HAM

发明人： Seung hyun LIM ,  Jeong hwan LEE ,  Kun hee CHO ,  Gun Hee HAN ,  Kwi Sung YOO ,  Seog heon HAM

IPC分类号： H04N5/335

CPC分类号： H04N5/378 ,  H03M1/1023 ,  H03M1/56

摘要： A CMOS image sensor includes a photodiode, a switch configured to transfer a signal sensed by the photodiode to a sensing node, and a comparator electrically and directly connected to the sensing node and configured to compare the sensed signal of the sensing node and a ramp signal. Reset offset of the comparator is maintained at a constant offset voltage level during an initialization mode.

摘要翻译： CMOS图像传感器包括光电二极管，被配置为将由光电二极管感测的信号传送到感测节点的开关，以及比较器，电连接并直接连接到感测节点，并且被配置为将感测节点的感测信号与斜坡信号 。 在初始化模式期间，比较器的复位偏移保持在恒定的偏移电压电平。

公开(公告)号：US20110069211A1

公开(公告)日：2011-03-24

申请号：US12879684

申请日：2010-09-10

申请人： Wun-Ki JUNG ,  Seog Heon HAM ,  Dong Hun LEE ,  Kwi Sung YOO ,  Min Ho KWON

发明人： Wun-Ki JUNG ,  Seog Heon HAM ,  Dong Hun LEE ,  Kwi Sung YOO ,  Min Ho KWON

IPC分类号： H04N5/335 ,  H03M3/00

CPC分类号： H04N5/378 ,  H03M3/48

摘要： Example embodiments are directed to an analog-to-digital converter (ADC) that controls a gain by changing a system parameter, an image sensor including the ADC and a method of operating the ADC. The ADC includes a sigma-delta modulator which receives an input signal and a clock signal and sigma-delta modulates the input signal into a digital output signal based on the clock signal and an accumulation unit which accumulates the digital output signal at each cycle of the clock signal according to an analog-to-digital conversion time and outputs an accumulation result. A system parameter is varied during the analog-to-digital conversion time to control a gain of the ADC. The method of operating the analog-to-digital converter includes sigma-delta modulating an input signal into a digital output signal in response to a clock signal input to the ADC; and accumulating the digital output signal at each cycle of the input clock signal according to an analog-to-digital conversion time and outputting an accumulation result.

摘要翻译： 示例性实施例针对通过改变系统参数来控制增益的模数转换器（ADC），包括ADC的图像传感器和操作ADC的方法。 ADC包括Σ-Δ调制器，其接收输入信号和时钟信号，并且Σ-Δ基于时钟信号将输入信号调制成数字输出信号;以及累积单元，其在每个周期的每个周期累积数字输出信号 时钟信号，并输出累积结果。 在模数转换时间期间，系统参数会发生变化，以控制ADC的增益。 操作模数转换器的方法包括响应于输入到ADC的时钟信号而将输入信号Σ-Δ调制成数字输出信号; 并且根据模数转换时间在输入时钟信号的每个周期累加数字输出信号，并输出累加结果。