基于红外消除技术的环境光敏感芯片设计
发布时间：2018-11-08 09:42
【摘要】：环境光敏感芯片的功能如同系统的眼睛一样可以感应到环境中的光信号,并且将这些光信号在转换成电信号之后进一步转换为数字信号。它常因用于屏幕亮度自动控制而在手机、数码相机、平板电脑等高集成度的低功耗产品中出现。本论文设计一款基于红外消除技术环境光敏感芯片,采用了标准的GF0.35μm的CMOS工艺。论文首先对芯片前端的光敏感器件进行物理级的TCAD建模和电学光学仿真,研究光信号到电信号的转换特性;其次基于此芯片应用的特点,选择并设计一款16位的双积分型模数转换电路(ADC)作为模拟电信号到数字电信号转换的核心,并使用数字抵消逻辑红外消除算法,去除环境光中的红外光的影响成分,达到保证芯片的输出结果与人眼对光谱的敏感程度一致的目的。最后进行版图的绘制。光敏感器件采用PN+型光电二极管结构,通过建模仿真得知其在不同波长时对太阳光谱的光电转换效果。双积分型模数转换电路中模拟电路部分包括积分器、开关电路、比较器、带隙基准;数字部分包括时钟脉冲计数器和逻辑控制模块以及数字信号处理(算法)模块。芯片通过对模拟输入信号的两次相反的积分,将其等比于时间量转化为数字结果的输出。将此芯片搭建在数模混合环境中进行仿真,其最终得到的数字信号结果满足人眼对光谱的敏感特性,验证了该芯片功能的正确性。
[Abstract]:Environmental light sensitive chips can sense the light signals in the environment just like the eyes of the system, and further convert these optical signals into digital signals after they are converted into electrical signals. It is often used for automatic screen brightness control in mobile phones, digital cameras, tablets and other highly integrated low-power products. In this paper, we design an environment light sensitive chip based on infrared elimination technology and adopt the standard GF0.35 渭 m CMOS technology. Firstly, the physical level TCAD modeling and electro-optical simulation of the light-sensitive devices in the front end of the chip are carried out to study the characteristics of the conversion from optical signals to electrical signals. Secondly, based on the characteristics of the chip application, a 16-bit dual integrated analog-to-digital conversion circuit (ADC) is selected and designed as the core of analog to digital signal conversion, and the digital cancellation logic infrared elimination algorithm is used. The effect of infrared light in environmental light is removed to ensure that the output of the chip is consistent with the sensitivity of the human eye to the spectrum. Finally, the layout of the drawing. The photo-sensitive device adopts the PN photodiode structure, and the photovoltaic conversion effect of the photodiode to the solar spectrum at different wavelengths is obtained by modeling and simulation. The analog circuit includes integrator, switch circuit, comparator and bandgap reference, and the digital part includes clock pulse counter and logic control module and digital signal processing (algorithm) module. By integrating the analog input signal twice and inversely, the chip converts its equal ratio to the output of the digital result. The chip is simulated in a digital-analog hybrid environment, and the result of the digital signal obtained satisfies the spectral sensitivity of the human eye, which verifies the correctness of the chip function.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN402;TN219
本文编号：2318100
[Abstract]:Environmental light sensitive chips can sense the light signals in the environment just like the eyes of the system, and further convert these optical signals into digital signals after they are converted into electrical signals. It is often used for automatic screen brightness control in mobile phones, digital cameras, tablets and other highly integrated low-power products. In this paper, we design an environment light sensitive chip based on infrared elimination technology and adopt the standard GF0.35 渭 m CMOS technology. Firstly, the physical level TCAD modeling and electro-optical simulation of the light-sensitive devices in the front end of the chip are carried out to study the characteristics of the conversion from optical signals to electrical signals. Secondly, based on the characteristics of the chip application, a 16-bit dual integrated analog-to-digital conversion circuit (ADC) is selected and designed as the core of analog to digital signal conversion, and the digital cancellation logic infrared elimination algorithm is used. The effect of infrared light in environmental light is removed to ensure that the output of the chip is consistent with the sensitivity of the human eye to the spectrum. Finally, the layout of the drawing. The photo-sensitive device adopts the PN photodiode structure, and the photovoltaic conversion effect of the photodiode to the solar spectrum at different wavelengths is obtained by modeling and simulation. The analog circuit includes integrator, switch circuit, comparator and bandgap reference, and the digital part includes clock pulse counter and logic control module and digital signal processing (algorithm) module. By integrating the analog input signal twice and inversely, the chip converts its equal ratio to the output of the digital result. The chip is simulated in a digital-analog hybrid environment, and the result of the digital signal obtained satisfies the spectral sensitivity of the human eye, which verifies the correctness of the chip function.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN402;TN219
【参考文献】
相关期刊论文 前1条
1 刘洋;安大伟;郭斌;;独立光伏发电系统在节能型建筑中的应用[J];计算机测量与控制;2008年02期
相关硕士学位论文 前2条
1 王尚文;双轴跟踪碟式太阳能集热器的研究[D];华中科技大学;2007年
2 李志强;太阳池形成机理的数值模拟与实验研究[D];天津大学;2008年
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