共查询到20条相似文献,搜索用时 62 毫秒
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《红外与毫米波学报》2018,(3)
提出了一种高均匀性低噪声的读出电路,该电路通过抑制非制冷红外焦平面阵列固定模式噪声,从而可实现高质量的红外图像.该电路前端采用了行共享的增益可控NMOS管抑制像元固定模式噪声,同时采用了新型的相关双采样电路抑制列固定模式噪声.在仿真基础上,采用了AMS 0.35μm CMOS工艺完成了16×16像元芯片的制备.对芯片的大量测试结果表明提出的读出电路可以有效地降低非制冷红外焦平面阵列的固定模式噪声,同时具有高均匀性的特点,适用于高性能非制冷红外探测器. 相似文献
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针对一款大面阵(640×512元)快照模式制冷型红外焦平面用的读出电路进行了初步分析验证.该读出电路采用改进DI结构,先积分后读出的积分控制模式,像素尺寸为25μm×25μm,芯片已在0.5μm双硅双铝(DPDM)标准CMOS工艺下试制.首先对该电路结构及工作原理进行分析,并对输入级等电路的传输特性进行仿真验证,最后给出探测器阵列与读出电路芯片互连后的测试结果.结果表明该读出电路适用于小像素、大规模的红外焦平面阵列. 相似文献
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针对非制冷红外探测器系统,提出了一种恒流偏置的红外读出电路(ROIC),该电路具有衬底温度补偿功能,且可实现片上偏移非均匀性补偿。基于微测辐射热计等效电阻受目标温度、衬底温度等影响的等效模型,每个读出通道采用两个盲电阻以消除衬底温度的影响,同时使用DAC逐点调节参考电压,以完成片上偏移非均匀性补偿。该ROIC 应用到阵列大小为320×240的非制冷微测辐射热计焦平面上,已在CSMC 05MIXDDST02的0.5?m CMOS标准工艺下成功流试验片。电路测试结果表明:对于常温目标,当衬底温度变化60 K时,输出电压变化小于500 mV;经偏移非均匀性补偿后,阵列的固定图像噪声为11.8 mV。该ROIC适用于应用于复杂温度环境的高均匀性非制冷红外探测器。 相似文献
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读出电路(ROIC)是非致冷红外焦平面阵列器件(UIRFPA)的关键组成部分之一。RO-IC性能的好坏直接影响到UIRFPA的性能,非致冷红外焦平面阵列读出电路的噪声抑制也是一个研究的热点。文章探讨了非致冷红外焦平面阵列读出电路的噪声及抑制方法。仿真实验结果表明,该方法具有一定的先进性。 相似文献
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读出电路对红外焦平面阵列成像系统的非均匀性有重要影响,采用动态非线性系统函数的泰勒级数建立功能电路单元的通用非均匀性模型,按照模拟型读出电路的一般结构建立读出电路的非均匀性模型,利用高斯噪声和柏林噪声模拟读出电路参数的空间随机分布,采用三维噪声的空间分量量化评估非均匀性,采用等长的矩阵模型简化阵列信号串行读出的时空转换过程,分析了噪声模型、多通道缓冲和响应非线性的非均匀特性,并指导某320×256阵列读出电路进行了非均匀特性仿真和优化。该方法能够对读出电路的非均匀性进行系统级仿真评估,并为其工程优化提供指导。 相似文献
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针对非制冷红外焦平面驱动电路在噪声和可靠性方面的高要求,分析了降低直流偏置电压噪声以降低红外焦平面阵列噪声的可行性,提出了一种新型低噪声的非制冷红外焦平面驱动电路.该驱动电路采用ADI公司的AD8606系列高精度低噪声运算放大器构成一个直流缓冲器,其具有强大的直流驱动能力和低噪声性能,实现了直流偏置电路.采用Altera公司的Cyclone Ⅱ系列可编程逻辑器件,设计红外焦平面的时序驱动电路.测试结果表明:焦平面探测器均方根噪声降低至397.83μV,为后续非制冷红外热像仪的研制奠定了基础. 相似文献
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Michael Reilly 《半导体技术》2004,29(12)
DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system. 相似文献
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Thomas M.Trexler 《半导体技术》2004,29(5)
From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test. 相似文献
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The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation. 相似文献
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The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high. 相似文献
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Today, micro-system technology and the development of new MEMS (Micro-Electro-Mechanical Systems) are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible. 相似文献
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Qi-jiang Ran Pei-de Han Yu-jun Quan Li-peng Gao Fan-ping Zeng Chun-hua Zhao 《光电子快报》2008,4(4):239-242
This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel's. 相似文献
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It is well known that adding more antennas at the transmitter or at the receiver may offer larger channel capacity in the multiple-input multiple-output(MIMO) communication systems. In this letter, a simple proof is presented for the fact that the channel capacity increases with an increase in the number of receiving antennas. The proof is based on the famous capacity formula of Foschini and Gans with matrix theory. 相似文献
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Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers
A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it. 相似文献
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A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working. 相似文献
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《中国通信》2014,(7)
正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks 相似文献