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本文介绍了新一代功率器件IPM,即智能功率模块的基本组成及技术。对其中的设计重点单片IC进行了优化设计,使之不仅具有通常的驱动和过流、短路、过热、欠压等保护功能,而且保护电路本身具有延时智能处理的功能。该电路还具有合适的光耦接口,以同计算机相连,达到智能控制的目的。 相似文献
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为了寻求高性价比的逆变电源解决方案,现代功率转换电路的设计迫切需要接口简单、结构紧凑的IGBT模块。市场对模块提出了更新的要求如:尽量低的高度:交、直流端子分列于模块两端;驱动器位于模块顶部。这些要求导致了SEMiX的诞生。SEMiX模块平台可以有效地推动功率回路的低电感设计。此外,本文还介绍了一种新的模块驱动方案SKYPER。SKYPER是一种即插式栅极驱动芯,它仅含最基本的驱动和保护功能。它与模块之间的匹配在本文中是通过驱动SEMiX模块的实例来说明的SEMiX与SKYPER的组合具备了智能功率模块的功能,但在开关特性的控制上,这种组合提供了现多的灵活性,从而为模块化逆变器的设计提供了一种方便的功能单元。 相似文献
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本文论述了一种X波段10W功率驱动模块的设计和实施方案,对模块的高频部分和偏压电路的工作原理和设计思想进行了论述。功率模块的偏压电路可实现模块的供电、调制、保护和温度补偿等功能。功放模块的测试结果表明,模块输出功率大于10W、上升下降沿小于150ns,杂散小于-65dBc。 相似文献
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为了寻求高性价比的逆变电源解决方案.现代功率转换电路的没计迫切需要接口简单、结构紧凑的IGBT模块。市场对模块提出了史新的要求.如:尽量低的高度,交、直流端子分列于模块的两端,驱动器位于模块的项部.这些要求导致了SEMiX的诞生。SEMiX模块半台可以有效地推动功率回路的低电感设计。此外,文中还介绍了一种新的模块驱动方案SKYPER,它是一种即插式栅极驱动芯.仅含最基本的驱动和保护功能。它与模块之间的匹配在文中是通过驱动SEMiX模块的实例来说明的。SEMiX与SKYPER的组合具备了智能功率模块的功能.但在开关特性的控制上.这种组合提供了吏多的灵活性.从而为模块化逆变器的设计提供了一种方便的功能单元。 相似文献
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三菱公司在电力机车领域发展了一门新的技术,就是采用基于新一代高压智能功率模块(HVIPM)两电平变频控制,该产品紧凑,轻巧,而且在模块内部集成了驱动电路和各种保护功能。 相似文献
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IGBT专用驱动模块M57962AL适于驱动大功率器件,可根据其内部的自保护功能对其应用电路进行安全可靠设计。该模块采用双电源驱动,有过流过压检测电路和保证IGBT可靠通断电路。总之,能够安全地驱动开关、变频器中的大功率IGBT。 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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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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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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《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