公开(公告)号：KR1020130030711A

公开(公告)日：2013-03-27

申请号：KR1020120060401

申请日：2012-06-05

Applicant: 동국대학교 산학협력단

Inventor： 송민규 ,  김대윤

IPC: H04N5/378 ,  H03M1/12

CPC classification number: H03M1/56 ,  H03M1/14 ,  H03M2201/235 ,  H03M2201/93 ,  H04N5/378

Abstract: PURPOSE: An ADC(Analog-to-Digital Converter) of multi-step structure using a plurality of lamp signals and an analog-to-digital conversion method thereof are provided to reduce the number of switches, thereby reducing an error of a holding voltage due to switching. CONSTITUTION: A comparator comprises: an OTA(Operational Transconductance Amplifier) which compares a signal of inputted light with a lamp value; capacitances which performs coarse analog-to-digital conversion and fine analog-to-digital conversion; and switches. A comparator is designed to respectively apply lamp signals in a coarse section and a fine section to two lamp generators without Vref voltage of an existed structure. The comparator is able to remove f-ADC and c-ADC switches.

Abstract translation: 目的：提供使用多个灯信号和其数模转换方法的多级结构的ADC（模数转换器），以减少开关数，从而减小保持电压的误差 由于切换 构成：比较器包括：将输入光的信号与灯值进行比较的OTA（运算跨导放大器）; 执行粗略模数转换和精细模数转换的电容; 和开关。 比较器被设计成分别将两个灯发电机的粗细部分和精细部分的灯信号分别施加在不存在结构的Vref电压的情况下。 比较器能够去除f-ADC和c-ADC开关。

公开(公告)号：KR1020070063215A

公开(公告)日：2007-06-19

申请号：KR1020050123225

申请日：2005-12-14

Applicant: 매그나칩 반도체 유한회사

Inventor： 오학수

IPC: H03M1/12 ,  H04N5/378 ,  H04N5/3745

CPC classification number: H03M1/56 ,  H03M1/0621 ,  H03M2201/235 ,  H03M2201/615 ,  H04N5/3745 ,  H04N5/378

Abstract: An analog digital converter, a CMOS(Complementary Metal-Oxide-Semiconductor) image sensor having the analog digital converter, and a method for removing analog offset are provided to secure a dynamic range of the CMOS image sensor by removing an analog offset. An analog digital converter(20) includes a lamp signal generator(21), a comparator(22), a counter part(24), and a latch part(23). The lamp signal generator(21) generates and outputs a lamp signal corresponding to an analog offset for removing the analog offset. The comparator(22) detects whether the lamp signal is negative or positive and removes the analog signal. The counter part(24) counts an analog pixel signal inputted to the comparator(22) for converting the analog pixel signal to a digital signal. The latch part(23) stores a counting number of the counter part(24) by responding to an output signal(Vo) of the comparator.

Abstract translation: 提供具有模拟数字转换器的模拟数字转换器，CMOS（互补金属氧化物半导体）图像传感器和用于去除模拟偏移的方法，以通过去除模拟偏移来确保CMOS图像传感器的动态范围。 模拟数字转换器（20）包括灯信号发生器（21），比较器（22），计数器部分（24）和锁存部分（23）。 灯信号发生器（21）产生并输出对应于用于去除模拟偏移的模拟偏移的灯信号。 比较器（22）检测灯信号是负极还是正极，并去除模拟信号。 计数器部件（24）对输入到比较器（22）的模拟像素信号进行计数，以将模拟像素信号转换为数字信号。 锁存部分23通过响应比较器的输出信号（Vo）来存储计数器部分（24）的计数号。