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多功能综合射频系统技术综述 总被引:3,自引:0,他引:3
介绍了综合射频技术和综合射频传感器的概念、特点和优势,综述了美国海军AMRFC计划、美国空军ISS计划和F-35战斗机的综合射频传感器系统,进一步探讨了多功能综合射频系统的关键技术和发展前景。 相似文献
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MOS工艺下叉指夹心集成电容的结构及其模拟分析 总被引:1,自引:0,他引:1
针对较大电容难以集成的实际,提出叉指夹心集成电容结构,采用横向电通量增加电容策略,在顶层上布铝导线呈平铺叉指夹心结构,涂盖Si3N4为介质,通过选择考虑边缘效应的模型进行仿真模拟,观测这种结构下两种连接方式电容的大小,得到了一定叉指电极长度的电容值可达到约15.3 pF. 相似文献
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A p-type low-temperature poly-Si thin film transistors (LTPS TFTs) integrated gate driver using 2 non-overlapped clocks is proposed. This gate driver features charge-sharing structure to turn off buffer TFT and suppresses voltage feed-through effects. It is analyzed that the conventional gate driver suffers from waveform distortions due to voltage uncertainty of internal nodes for the initial period. The proposed charge-sharing structure also helps to suppress the unexpected pulses during the initialization phases. The proposed gate driver shows a simple circuit, as only 6 TFTs and 1 capacitor are used for single-stage, and the buffer TFT is used for both pulling-down and pulling-up of output electrode. Feasibility of the proposed gate driver is proven through detailed analyses. Investigations show that voltage bootrapping can be maintained once the bootrapping capacitance is larger than 0.8 pF, and pulse of gate driver outputs can be reduced to 5 μs. The proposed gate driver can still function properly with positive VTH shift within 0.4 V and negative VTH shift within-1.2 V and it is robust and promising for high-resolution display. 相似文献
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结构功能一体化相控阵天线高密度集成设计方法 总被引:2,自引:0,他引:2
提出了一种新的结构功能一体化相控阵天线的高密度集成设计方法。采用低温共烧陶瓷(LTCC)技术实现了有源相控阵天线的一体化设计,包括天线阵面、瓦式收发(TR)组件、热控装置、馈电网络的高密度集成。采用ANSYS等软件对天线的系统体系构架、总体性能评估、共形承载天线罩、天线阵面、瓦式TR组件以及系统热设计进行仿真分析并进行实物加工和测试。结果表明,该天线的等效全向辐射功率(EIRP)为23.6 dBw,噪声为3.57 dB,测试值与设计值吻合很好。 相似文献
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集成电路具有密度高、引线短、外部接线少、体积小、重量轻、成本低、使用方便等特点,提高了电子设备的可靠性和灵活性,在性能上也优于分立元件。采用集成化方式生产的LED显示器件,采用金属外壳封装工艺,很好地解决了集成模块的散热和均热问题;采用COB生产工艺,像素密度可超过25万点/平方米;集成化封装工艺使LED芯片得到了良好的保护;表面黑化处理工艺使整屏的显示效果更好。采用该新型器件,并结合逐点校正技术制造的显示屏,将校正数据存储在模组中,上电后控制器自动读回校正数据,对画面进行校正处理。很好地消除了模块效应.可以得到完美的显示效果。 相似文献
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Sunghyun Park Flynn M.P. 《IEEE transactions on circuits and systems. I, Regular papers》2006,53(8):1704-1711
We employ on-chip inductors to improve the sampling speed and power consumption of regenerative comparators. Since these inductors are far smaller than those used in typical RF designs, the addition of inductors has little impact on area. Simulations based on accurate inductor models indicate more than a doubling of comparator sampling speed for a given power consumption, or a halving in power consumption for a given sampling speed. We present a detailed analysis of the new scheme. The technique is verified with test measurements of 16 comparators, implemented in 0.18-/spl mu/m digital CMOS, sampling at 3.84 GHz. 相似文献
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文章提出了一种给集成开关电源提供初始电压的高压启动电路。一个增强型的VDMOS晶体管被用来提供启动电流和承受高压。VDMOS的栅被一个浮空P岛偏置。启动电路用了一个具有高的源对地击穿电压的NMOS来获得大的偏置电压范围。仿真结果表明高压启动电路能够按照设计正常的启动和重启动。本文提出的结构比起其它方案来更节能,成本更低。 相似文献
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A novel high voltage start up circuit for providing an initial bias voltage to an integrated switched mode power supply(SMPS) is presented.An enhanced mode VDMOS transistor,the gate of which is biased by a floating pisland, is used to provide start up current and sustain high voltage.An NMOS transistor having a high source to ground breakdown voltage is included to extend the bias voltage range to the SMPS.Simulation results indicate that the high voltage start up circuit can start and restart as designe... 相似文献
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文章针对传统通用串行总线(USB)接口器件存在的数据传输速率低、无法满足USB接口数据的快速传输需求问题,展开高速集成处理器USB接口的设计研究。通过基于OpenVPX的高速集成数据处理、USB接口连接方式设计、USB接口寄存器初始化,实现USB接口的高速通信。通过实验证明,该USB接口与USB 3.0接口相比有效提高了对数据传输的速率,满足数据实时高速传输需要。 相似文献