A 256×256 compact CMOS image sensor with on-chip motion detection function
A 256×256 compact CMOS image sensor with on-chip motion detection function
复制标题
具有片上运动检测功能的 256×256 紧凑型 CMOS 图像传感器
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
H. Toyoda
中科院分区：
文献类型：
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作者：
S. Mizuno;K. Fujita;Hiroo Yamamoto;N. Mukozaka;H. Toyoda
实现了 256/spl 次/256 CMOS 无源像素图像传感器，特别配备了简单开关，可实现运动检测。每个像素由光电二极管和地址开关的简单组合组成。每个像素产生的光电荷通过列电荷放大器阵列转换为电压，并利用光电二极管作为帧存储器实现了运动检测。其输出通过 128 阵列 8 位模数 (A/D) 转换器转换为数字值。同时，通过利用A/D转换作为CDS电路来抑制固定模式噪声。由于其结构简单，实现了70%以上的填充率。提取的运动检测结果可以通过128个A/D转换器阵列以每秒128帧的数字方式显示。
A 256/spl times/256 CMOS passive pixel image sensor with especially equipped simple switches, which enables motion detection, is implemented. Each pixel consists of a simple combination of a photodiode and an address switch. Photocharge generated at each pixel is converted to voltage by means of a column charge amplifier array, and motion detection has been realized with utilizing the photodiode as a frame memory. Its output is transformed to a digital value with a 128 array 8-bit analog-to-digital (A/D) converter. Simultaneously, fixed pattern noise is suppressed by utilizing A/D conversion as the CDS circuit. Due to its simple structure, more than 70% fill factor ratio has been realized. The extracted motion detection results can be displayed digitally at 128 frames per second by means of 128 A/D converter arrays.