离子晶体的马德隆常数计算.doc

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离子晶体的马德隆常数计算,全文18页约8000字论述翔实 目录摘要abstract1 绪论1.1 cmos图像传感器的分类及特点1.1.1 无源像素传感器.1.1.2 有源像素传感器.1.2cmos图像传感器的应用..2cmos图像传感器的工作原理2.1半导体的光电效应..2.1.1 光电二极管的工作原理.2.2.1 连...
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离子晶体的马德隆常数计算

全文18页 约8000字 论述翔实

目录
摘要………………………………………………………………
ABSTRACT………………………………………………………
1 绪论……………………………………………………………
1.1 CMOS图像传感器的分类及特点……………………………
1.1.1 无源像素传感器………………………………………….
1.1.2 有源像素传感器………………………………………….
1.2 CMOS图像传感器的应用…………………………………..
2 CMOS图像传感器的工作原理…………………………………
2.1 半导体的光电效应…………………………………………..
2.1.1 光电二极管的工作原理……………………………………….
2.2.1 连续工作模式…………………………………………………….
2.2.2 电荷存储工作方式………………………………………………
2.3 总结…………………………………………………………………..
3 CMOS图像传感器的噪声分析…………………………………
3.1 引言……………………………………………………………….
3.2 CMOS图像传感器的热噪声…………………………………….
3.3 闪烁噪声…………………………………………………………..
3.4 图像传感器的动态范围……………………………………………
4 有源像素CMOS图像传感器……………………………………….
4.1 CMOS图像传感器的整体结构……………………………………..
4.2 像素设计结构………………………………………………………
5 输出电路………………………………………………………
5.1 输出电路…………………………………………………….
5.2 缓冲器……………………………………………………
6 总结……………………………

摘要
CMOS图像传感器是一种基于CMOS工艺的技术,在近十年来得到了快速的发展,它通过集成的模拟和数字电路对图像进行采集、传输、处理以及输出。这种技术相比较于其他类型的图像传感技术,具有高集成度、低功耗、低成本、功能强大等优点,是一种有着广阔前景的技术。
介绍了CMOS图像传感器的发展,CMOS图像传感器的感光单元一般采用光电二极管,详细分析了光电二极管的工作原理,介绍了现有CMOS工艺兼容的不同结构的光电二极管。
读出电路是CMOS图像传感器的重点单元。采用一种新型结构的读出电路,该路包含一个动态源随器和一个采样保持电容和一个复位开关,结构简单,时序易实现,并且是单端输出,有着诸多优点。详细阐述了其上工作原理,并对之进了PSpice模拟仿真。移位寄存器在CMOS图像传感器中,用来给像素单元提供选信号,实现图像传感器的逐位扫描输出。比较两种移位寄存器单元电路,并对进行了PSpice模拟仿真,准静态CMOS移位寄存器有通用性好、输出时序有交叠、时钟信号要求低等特点.

关键词 : CMOS图像传感器,光电二级管,有源像素,固定模式噪音。


Abstract
CMOS image sensor is the technology based on CMOS process, making great progress in recent ten years. It samples, transmits, processes and exports images using integrated digital and analog circuits. Comparing to other image sensors, it has the benefits of high integration, lowpower, low cost and powerful function, and has broad prospect.
This paper introduced the development of CMOS image sensor, Photodiode has been used as CMOS image sensor image acquisition devices Analyses the principle of photodiode in detail, introduced different and its characteristic, which is compatible with CMOS process .
Read out circuit is a critical unit of CMOS image sensor. A new type read out circuit is composed with one namic source follower, one capacitance for sampling and holding and one reset switch. This circuit has advantages with simple structure,acquiring related timing easily, single output, and so on. While expatiated the principle of the read out circuit, and simulated with PSpice. Shift registers are used as a select signal for pixel unit in CMOS image sensor, achieving scanning output bit after bit in the sensor. Comparing two circuits for shift register, and simulating for each one. Staticshift register has advantage with nice currency, fold each other of output timings and acquiring clock signal easily.

部分参考文献

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