一种高阶全极点CCII高通滤波器的设计

利用第2代电流传送器CCII(thesecondgenerationcurrentconveyor)和多端输出电流传送器MOCC(multipleoutputscurrentconveyor),实现了一种高阶全极点的电流模式高通滤波器;给出了系统的设计公式,并举例设计了一个五阶Butterworth高通滤波器;通过PSPICE模拟仿真,得出的结论与理论分析完全吻合。此高通滤波器电路结构简单、新颖,易于集成。     

基于CCⅡ＋仿真电感的电流模式五阶高通滤波器设计

提出了一种用第二代电流传送器「ＣＣⅡ＋」的接地仿真电感电路，并利用此ＣＣⅡ＋仿真电感设计了一个基于ＬＣ梯形的电流模式五阶高通滤波器，此法可进一步推广到更高介高通滤波器的设计。文中对截止频率分别为１０ｋＨｚ，２５ｋＨｚ，１００ｋＨｚ的电流模式五阶Ｂｕｔｔｅｒｗｏｒｔｈ滤波器进行了计算机仿真，模拟结果与理论分析一致。     

一种高阶全极点CCⅡ高通滤波器的设计

利用第2代电流传送器CCⅡ(the second generation current conveyor)和多igor出电流传送器MOCC(multiple outputs current conveyor)，实现了一种高阶全极点的电流模式高通滤波器；给出了系统的设计公式，并举例设计了一个五阶Butterworth高通滤波器；通过PSPICE模拟仿真，得出的结论与理论分析完全吻合。此高通滤波器电路结构简单、新颖，易于集成。     

新的电流模式低通和带通电路实现

本文提出了用改进的第二代电流传送器(CCCⅡ)综合出二阶电流模式低通和带通滤波器的通用电路,电路的频率ω_0和品质因素Q能独立调节,为了验证电路的可行性,给出了低通和带通滤波器的PSPICE仿真结果,该通用电路有低的无源灵敏度。     

多环反馈电流模式二阶滤波器

本文提出了用改进式电流传送器实现多环反馈电流模式二阶低通，高通，带通，陷波滤波器。给出了ＰＳＰＩＣＥ仿真结果，进一步证明了理论分析的正确性，电路的品质因素Ｑ和截止频率ｗｐ，增益Ｈａ独立可调，该电路的无源灵敏度低，适于全集成实现。     

用零极子对偶变换法实现电流模式电路

基于对偶原理并借助零极子有源器件模型的对偶变换方法，实现电压模式电路到电流模式电路的转换，并给出四阶高通滤波器变换实例和PSPICE仿真结果。     

谐波电流继电器的研究与设计

本在简述了电网高次谐波来源、危害及对策后，指出谐波电波继电器是电网继电保护的重要仪表。接着，从用户对谐波电流继电器的基本要求出发，给出了谐波电流继电器的设计思路和整机粗图。进而着重研究了有源电感带通滤波器在谐波电流继电器中应用的诸问题。最后得出了几条有价值的结论。     

多环反馈电流模式二阶滤波器

本文提出了用改进式电流传送器实现多环反馈电流模式二阶低通、高通、带通、陷波滤波器．给出了PSPICE仿真结果，进一步证实了理论分析的正确性、电路的品质因素Q和截止频率ωp、增益H0独立可调，该电路的无源灵敏度低，适于全集成实现．     

CCⅡ电流型变参数有源器件

用CCII+CCII-构成电流型变参数有源电感和非线性电阻器件 ,具有频带范围宽和参数连续可变的优点 ,特别适合于蔡氏混沌电路 .对这类电路进行了综合 ,并给出了理论分析及计算机仿真结果 .     

用CMOS电流反馈运算放大器实现全极点高通滤波器

采用新型CMOS电流反馈运算放大器以及电阻和电容元件模拟无源LC梯型高通滤波器电路，得到了一种高频特性优良的容易全集成的连续时间有源全极点高通滤波器。以三阶高通滤波器的实际电路为例用OrCAD软件进行了MOS管级的计算机仿真，结果表明本文所出的电路方案是正确可行的。这种技术在高频高速模拟集成电路的设计中有较大的实用价值。     

一系列基于CCⅡ的Q增强二阶滤波器

本文提出了一种用单块有源CCⅡ实现的新型有源网络,它可以实现二阶高通、低通和带通滤波器,其特点是电路的ω0和Q值可分别由两个接地元件独立调节,文中还给出了电路的设计、灵敏度分析和实验结果。     

Study on switched reluctance generator

The linear and non-linear math models of the switched reluctance generator (SRG) in generator mode were established in this work. The phase current and energy conversion process during generator operation were simulated by the linear math model. The non-linear math model was used to analyze the characteristics of the SRG operation in self-excitation mode and in separately-excitation mode. Some important findings on how the SRG is operated and controlled were obtained in this study, which provides theoretical basis for further design and experimental study.     

Study on switched reluctance generator

INTRODUCTIONWindenergy,beingaclean,renewablesourceofenergyhasbeenusedforcenturies.Variousschemesforgeneratingelectricityfromthewindhadbeenproposed(RimandKrishnan,1994;Pan,1993).TheSRG’sattributeswhichmakeitideallysuitedforwindenergysystemsincludeextremerobustness,highefficiencyofenergyconversion,abilitytoworkoververylargespeedranges,highenergydensity,andcontrolsimplicity.Ithasshowngreatdevelopingpotentialandstudyvalueintheareaofwindpowergeneration(Cardenasetal.,1995;Torrey,2002).Ordin…     

基于分布式算法的串/并混合构架FIR滤波器设计

研究基于分布式算法的并行度为2的串/并混合构架FIR数字滤波器设计,提出了一种新的FPGA实现结构。该结构引入一个新的移位累加模块,用于实现2查询表输出的累加运算,采用移位寄存器构建相关控制电路。设计输入精度为8位的FIR滤波器,通过Quartus II 7.1及Modelsim 6.0SE的综合与仿真,以及在EPF10K70RC240-4FPGA目标器件上的实现。结果表明:该结构有效缩减关键路径且简化模块化设计流程,性能获得显著提升。     

CURRENT MODE CIRCUIT SYMBOLIC ANALYSIS WITH MATH-EMATICA

提出了用Ｍａｔｈｅｍａｔｉｃａ对电流模式电路进行符号分析的方法．利用Ｍａｔｈｅｍａｔｉｃａ强大的符号分析功能，可以极大地简化电流模式电路的符号分析．有源器件的理想模型用零泛器表示．给出了对ＣＣＩ构成的电流模式滤波器电路的分析实例．     

低待机功耗开关电源跨周期模式集成控制电路的仿真实现

This paper explores and proposes a design solution of an integrated skip cycle mode (SCM) control circuit with a simple structure. The design is simulated and implemented with XD10H-1.0μm modular DIMOS 650 V process. In order to meet the requirement of a wide temperature range and high yields of products, the schematic extracted from the layout is simulated with five process corners at 27℃and 90℃. Simulation results demonstrate that the proposed integrated circuit is immune to noise and achieves skipping cycle control when switching mode power supply (SMPS) works with low load or without load.     

单CCⅡ实现的Q增强二阶高通网络

本文提出了两种新型的Q增强二阶高通网络,仅采用一块第二代电流传输器(CCI)及四个无源元件,较用运算放大器实现的同类电路如Sallen—Key高通电路简单.     

Learning as Problem Design Versus Problem Solving: Making the Connection Between Cognitive Neuroscience Research and Educational Practice

ABSTRACT— How can current findings in neuroscience help educators identify particular cognitive strengths in students? In this commentary on Immordino‐Yang’s research regarding Nico and Brooke, I make 3 primary assertions: (a) the cognitive science community needs to develop an accessible language and mode of communicating applicable research to educators, (b) educators need proper professional development in order to understand and relate current research findings to practice in the classroom, and (c) the specific research on Nico and Brooke clearly suggests that educators need to rethink the classroom as a place not of problem solving but rather problem design in order to further understand and use the cognitive strengths of each individual student.