基于紅外消除技術(shù)的環(huán)境光敏感芯片設(shè)計(jì)
發(fā)布時(shí)間：2018-11-08 09:42
【摘要】：環(huán)境光敏感芯片的功能如同系統(tǒng)的眼睛一樣可以感應(yīng)到環(huán)境中的光信號,并且將這些光信號在轉(zhuǎn)換成電信號之后進(jìn)一步轉(zhuǎn)換為數(shù)字信號。它常因用于屏幕亮度自動控制而在手機(jī)、數(shù)碼相機(jī)、平板電腦等高集成度的低功耗產(chǎn)品中出現(xiàn)。本論文設(shè)計(jì)一款基于紅外消除技術(shù)環(huán)境光敏感芯片,采用了標(biāo)準(zhǔn)的GF0.35μm的CMOS工藝。論文首先對芯片前端的光敏感器件進(jìn)行物理級的TCAD建模和電學(xué)光學(xué)仿真,研究光信號到電信號的轉(zhuǎn)換特性;其次基于此芯片應(yīng)用的特點(diǎn),選擇并設(shè)計(jì)一款16位的雙積分型模數(shù)轉(zhuǎn)換電路(ADC)作為模擬電信號到數(shù)字電信號轉(zhuǎn)換的核心,并使用數(shù)字抵消邏輯紅外消除算法,去除環(huán)境光中的紅外光的影響成分,達(dá)到保證芯片的輸出結(jié)果與人眼對光譜的敏感程度一致的目的。最后進(jìn)行版圖的繪制。光敏感器件采用PN+型光電二極管結(jié)構(gòu),通過建模仿真得知其在不同波長時(shí)對太陽光譜的光電轉(zhuǎn)換效果。雙積分型模數(shù)轉(zhuǎn)換電路中模擬電路部分包括積分器、開關(guān)電路、比較器、帶隙基準(zhǔn);數(shù)字部分包括時(shí)鐘脈沖計(jì)數(shù)器和邏輯控制模塊以及數(shù)字信號處理(算法)模塊。芯片通過對模擬輸入信號的兩次相反的積分,將其等比于時(shí)間量轉(zhuǎn)化為數(shù)字結(jié)果的輸出。將此芯片搭建在數(shù)�；旌檄h(huán)境中進(jìn)行仿真,其最終得到的數(shù)字信號結(jié)果滿足人眼對光譜的敏感特性,驗(yàn)證了該芯片功能的正確性。
[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.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN402;TN219
本文編號：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.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN402;TN219
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