A new interconnect network model for linear netw ork reduction is presented.In this new model,the ports of the interconnect network are classified into two groups:active and passive ports.After the classification,some...A new interconnect network model for linear netw ork reduction is presented.In this new model,the ports of the interconnect network are classified into two groups:active and passive ports.After the classification,some proprieties of the interconnect network are found to be redundant and pruned before reduction.For common interconnect networks,the scale of reduced models is smaller than 50% of the scale of previous works.展开更多
A 1.34 GHz-1=60 MHz low noise amplifier (LNA) designed in a 0.35 pm SiGe process is presented. The designed LNA exhibits a power gain of 21.46 dB and a noise figure (NF) of 1.27 dB at 1.34 GHz. The linearity is im...A 1.34 GHz-1=60 MHz low noise amplifier (LNA) designed in a 0.35 pm SiGe process is presented. The designed LNA exhibits a power gain of 21.46 dB and a noise figure (NF) of 1.27 dB at 1.34 GHz. The linearity is improved with an active biasing technique. The post-layout simulation shows an input referred 1-dB compression point (IPldn) of-11.52 dBm. Compared with the recent reported high gain LNAs, the proposed LNA has a much better linearity without degrading other performance. The LNA draws 10 mA current from a 3.3 V power supply.展开更多
A heavy-ion irradiation experiment is studied in digital storage cells with different design approaches in 130?nm CMOS bulk Si and silicon-on-insulator (SOI) technologies. The effectiveness of linear energy transf...A heavy-ion irradiation experiment is studied in digital storage cells with different design approaches in 130?nm CMOS bulk Si and silicon-on-insulator (SOI) technologies. The effectiveness of linear energy transfer (LET) with a tilted ion beam at the 130?nm technology node is obtained. Tests of tilted angles θ=0 ° , 30 ° and 60 ° with respect to the normal direction are performed under heavy-ion Kr with certain power whose LET is about 40?MeVcm 2 /mg at normal incidence. Error numbers in D flip-flop chains are used to determine their upset sensitivity at different incidence angles. It is indicated that the effective LETs for SOI and bulk Si are not exactly in inverse proportion to cosθ , furthermore the effective LET for SOI is more closely in inverse proportion to cosθ compared to bulk Si, which are also the well known behavior. It is interesting that, if we design the sample in the dual interlocked storage cell approach, the effective LET in bulk Si will look like inversely proportional to cosθ very well, which is also specifically explained.展开更多
线性定常电路通常由一系列刚性很强的微分方程组描述,此类微分方程的求解一直是传统基于时间离散的积分方法所面临的难题。基于状态变量离散思想的量化状态系统(Quantized State Systems,QSS)算法能有效解决这一类微分方程。现有的QSS...线性定常电路通常由一系列刚性很强的微分方程组描述,此类微分方程的求解一直是传统基于时间离散的积分方法所面临的难题。基于状态变量离散思想的量化状态系统(Quantized State Systems,QSS)算法能有效解决这一类微分方程。现有的QSS算法只能通过设置量子大小来求解,而大多数仿真应用场景是需要事先设置算法的误差,这说明得到量子与误差之间的量化关系显得尤为重要。为此,通过分析线性定常电路状态方程的统一形式,提出一种面向线性定常电路的QSS误差计算方法。将其用Modelica模型表示,并将模型应用于2个典型线性定常电路系统进行仿真求解。通过对比QSS算法解与解析解证明了上述方法的准确性、简便性。展开更多
针对40.5kV真空断路器分合闸运动特性对操动机构的要求,设计了一种新型的电机操动机构,即直线感应电动机(cylinder linear induction motor,C-LIM)机构。断路器在分、合闸过程中对操动机构的动作和时间特性有较高要求,对断路器C-LIM机...针对40.5kV真空断路器分合闸运动特性对操动机构的要求,设计了一种新型的电机操动机构,即直线感应电动机(cylinder linear induction motor,C-LIM)机构。断路器在分、合闸过程中对操动机构的动作和时间特性有较高要求,对断路器C-LIM机构运动特性及动力特性进行了分析,并规划分、合闸运动时的理想速度曲线。针对C-LIM特有的边缘效应,在考虑动态纵向边缘效应的基础上建立了矢量控制数学模型。对C-LIM驱动断路器触头运动控制系统进行仿真及样机的实验验证。结果表明,该直线电机直接驱动断路器的操动轴、驱动器动态性能好,振动较小,满足断路器分合闸运动特性要求,为断路器智能控制奠定了基础。展开更多
针对低成本无线射频识别(RFID)系统存在的安全性问题,提出一种基于PUF的低成本RFID安全协议。利用PUF的物理不可克隆性识别标签的身份,并利用线性反馈移位寄存器(LFSR)产生随机系列,加密阅读器与标签之间的通信,能抵抗重放攻击、跟踪攻...针对低成本无线射频识别(RFID)系统存在的安全性问题,提出一种基于PUF的低成本RFID安全协议。利用PUF的物理不可克隆性识别标签的身份,并利用线性反馈移位寄存器(LFSR)产生随机系列,加密阅读器与标签之间的通信,能抵抗重放攻击、跟踪攻击、物理攻击、窃听攻击等多种攻击。在Altera DE2板上使用FPGA实现PUF和LFSR,采用Quartus II 8.0编程。实验结果证明,该协议的执行时间和门电路数量能达到低成本标签的要求。展开更多
文摘A new interconnect network model for linear netw ork reduction is presented.In this new model,the ports of the interconnect network are classified into two groups:active and passive ports.After the classification,some proprieties of the interconnect network are found to be redundant and pruned before reduction.For common interconnect networks,the scale of reduced models is smaller than 50% of the scale of previous works.
文摘A 1.34 GHz-1=60 MHz low noise amplifier (LNA) designed in a 0.35 pm SiGe process is presented. The designed LNA exhibits a power gain of 21.46 dB and a noise figure (NF) of 1.27 dB at 1.34 GHz. The linearity is improved with an active biasing technique. The post-layout simulation shows an input referred 1-dB compression point (IPldn) of-11.52 dBm. Compared with the recent reported high gain LNAs, the proposed LNA has a much better linearity without degrading other performance. The LNA draws 10 mA current from a 3.3 V power supply.
基金Supported by the Key Laboratory of Microsatellites,Chinese Academy of Sciences
文摘A heavy-ion irradiation experiment is studied in digital storage cells with different design approaches in 130?nm CMOS bulk Si and silicon-on-insulator (SOI) technologies. The effectiveness of linear energy transfer (LET) with a tilted ion beam at the 130?nm technology node is obtained. Tests of tilted angles θ=0 ° , 30 ° and 60 ° with respect to the normal direction are performed under heavy-ion Kr with certain power whose LET is about 40?MeVcm 2 /mg at normal incidence. Error numbers in D flip-flop chains are used to determine their upset sensitivity at different incidence angles. It is indicated that the effective LETs for SOI and bulk Si are not exactly in inverse proportion to cosθ , furthermore the effective LET for SOI is more closely in inverse proportion to cosθ compared to bulk Si, which are also the well known behavior. It is interesting that, if we design the sample in the dual interlocked storage cell approach, the effective LET in bulk Si will look like inversely proportional to cosθ very well, which is also specifically explained.
文摘线性定常电路通常由一系列刚性很强的微分方程组描述,此类微分方程的求解一直是传统基于时间离散的积分方法所面临的难题。基于状态变量离散思想的量化状态系统(Quantized State Systems,QSS)算法能有效解决这一类微分方程。现有的QSS算法只能通过设置量子大小来求解,而大多数仿真应用场景是需要事先设置算法的误差,这说明得到量子与误差之间的量化关系显得尤为重要。为此,通过分析线性定常电路状态方程的统一形式,提出一种面向线性定常电路的QSS误差计算方法。将其用Modelica模型表示,并将模型应用于2个典型线性定常电路系统进行仿真求解。通过对比QSS算法解与解析解证明了上述方法的准确性、简便性。
文摘针对40.5kV真空断路器分合闸运动特性对操动机构的要求,设计了一种新型的电机操动机构,即直线感应电动机(cylinder linear induction motor,C-LIM)机构。断路器在分、合闸过程中对操动机构的动作和时间特性有较高要求,对断路器C-LIM机构运动特性及动力特性进行了分析,并规划分、合闸运动时的理想速度曲线。针对C-LIM特有的边缘效应,在考虑动态纵向边缘效应的基础上建立了矢量控制数学模型。对C-LIM驱动断路器触头运动控制系统进行仿真及样机的实验验证。结果表明,该直线电机直接驱动断路器的操动轴、驱动器动态性能好,振动较小,满足断路器分合闸运动特性要求,为断路器智能控制奠定了基础。
文摘针对低成本无线射频识别(RFID)系统存在的安全性问题,提出一种基于PUF的低成本RFID安全协议。利用PUF的物理不可克隆性识别标签的身份,并利用线性反馈移位寄存器(LFSR)产生随机系列,加密阅读器与标签之间的通信,能抵抗重放攻击、跟踪攻击、物理攻击、窃听攻击等多种攻击。在Altera DE2板上使用FPGA实现PUF和LFSR,采用Quartus II 8.0编程。实验结果证明,该协议的执行时间和门电路数量能达到低成本标签的要求。