时钟电路、倍频器、分频器、混频器、变频器、移相器

0623091一种新型铁电体移相器[刊,中]/周雁翎//雷达科学与技术．—2006,4(3)．—189-192(D)介绍了一种用于相控阵雷达的新型铁电体移相器,利用有限元方法对铁电体材料加载波导移相器进行了分析,给出了计算结果。最后讨论了铁电体移相器设计中几个值得关注的重要问题。参4 0623092台达V系列变频器转矩控制模式的技术应用[刊,中]/张硕//单片机与嵌入式系统应用．—2006,(7)．—84-85(C) 0623093可编程数字解调分析模块的设计应用[刊,中]/史英春//系统工程与电子技术．—2006,28(6)．—807-808,928(E)利用数字下变频器HSP50214B同TMS320C5409 DSP的配合,设计了一种可编程的数字解调分析模块,通过软件编程实现对不同调制样式信号的解调和分析,最后给出了该模块在数字监测接收系统中的应用。实验证明该模块在无线电接收系统中有着很强的实用     

网络、滤波、滤波器、限幅器、斩波器

IELDVD060:9286:29507-634 0603592 基于电流差分隔离放大器(CDBA)的电流模式滤波器 =Current differencing buffered amplifier(CDBA)based     

倍频器、分频器、混频器、变频器、移相器

Y20O2·63088·65 0215313模拟电路的多故障诊断法=Amethedformultiplefaultdiagnsis in analog Cireuits〔会,英〕/Starzyk,J .A.&Liu,D.//Proceedin郎of the 33rd助utheastems卿因-苗um on System Theo甲一65一68(PE)Y2002·63118·25 0215314用浮动栅MOS电路设计模拟和数字比较器=Designsof ana〕09。nd山giral。omparators with FGMOS(会,英〕/Nandhasri,K.&Ngarmnil,J.//2001 IEEE Interna-如n目S帅工洲〕sium on Circuits ands邓tems,Vol.1 of5,一25一28(HE)Y2002·63118。117 0215315开关CMOS混频器的直接下变频二…     

倍频器、分频器、混频器、变频器、移相器

Y99-61822-85 2002135毫米波和亚毫米波振荡器的全光学实现用的集成光学光子混频器=Integrated optics photonic mixer for an all-optical implementation of a millimeter and sub-millimeterwave oscillator[会,英]/Dubovitsky,S.& Chuyanov,V.//International Topical Meeting on Microwave Pho-tonics.—85～86(UC)     

倍频器、分频器、混频器、变频器、移相器

Y2000-62085-299 0009527分布式微电子机械系统移相器的最佳化=Optimiza-tion of distributed MEMS phase shifters[会,英]/Barker,N.S.& Rebeiz,G.M.//1999 IEEE MTT-S Interna-tional Microwave Symposium,Vol.1.—299～302(UC)     

网络、滤波、滤波器、限幅器、斩波器

0608992超宽带非周期信号等效采样的研究〔刊,中〕/李熹//电测与仪表.—2005,42(12).—45-49,38(D)对超宽带窄脉冲信号需要进行高速采样才能有效采集,等效采样是一种实现超高速采样的有效手段。经过了时间间隔调制的超宽带脉冲串信号已经不是周期信号,而传统的等效采样一般都是以被采集信号的周期为前提的。提出了一种对于超宽带非周期信号等效采样的新方法,并对设计出的电路进行测试,得出了理想的测试结果。参50608993基于FIR滤波器组的DFT算法=DFTalgorithmbasedon FIR filter banks〔刊,英〕/E.V.Papoulis and T.Stathaki//Elect…     

倍频器、分频器、混频器、变频器、移相器

Y2000-62085-117 0005938利用噪声系数的分析公式设计超低噪声混频器的方法=Design of ultra low noise mixer using an analytical for-     

倍频器、分频器、混频器、变频器、移相器

Y98-61402-163 9907495数字移相器对仅相位控制的旁瓣抑制差分图的影响=Effect of digital phase shifters on phase only controlledSLS difference patterns[会,英]/Sridevi,P.V.& Ra-ju,G.S,N.//1997 Proceedings of the InternationalConference on Electromagnetic Interference and Compati-bility.—163～166(HG)利用具有细心设计的附加相位分布的阵天线可产生不同的波束形状,在快速扫描和波束变化应用中通     

倍频器、分频器、混频器、变频器、移相器

Y2002-63121-378 0219798遥测中应用的直接转换的2.4GH_z 4端口混频器=A2.4GHz four port mixer for direct conversion used intelemetering[会,英]/Jung,T.J.& Sau,C.C.K.//The IEEE International Symposium on Circuits and Svs-terns Vol.4 of 5.—378～381(HE)Y2002-63121-382 0219799直接转换接收机的低压有源混频器的设计=Design oflow-voltage active mixer for direct conversion receivers     

倍频器、分频器、混频器、变频器、移相器

0611737 100 nm变形增进HEMT技术的108 GHz动态分频器 =108GHz dynamic frequency divider in 100 nm metamorphic enhancement HEMT technology[刊,英]／O． Kappeler,A．Leuther／／Electronics Letters．-2003,39 (13)．-989(E)     

GEMNET: a generalized, shuffle-exchange-based, regular, scalable,modular, multihop, WDM lightwave network

GEMNET is a generalization of shuffle-exchange networks and it can represent a family of network structures (including ShuffleNet and de Bruijn graph) for an arbitrary number of nodes. GEMNET employs a regular interconnection graph with highly desirable properties such as small nodal degree, simple routing, small diameter, and growth capability (viz. scalability). GEMNET can serve as a logical (virtual), packet-switched, multihop topology which can be employed for constructing the next generation of lightwave networks using wavelength-division multiplexing (WDM). Various properties of GEMNET are studied     

Thermodynamics of copper matte converting: Part III. Steady-state volatilization of Au,Ag, Pb,Zn, Ni,Se, Te,Bi, Sb,and As from slag,matte, and metallic copper

A comprehensive compilation of various thermodynamic data required for a complete analysis of copper matte converting reactions is presented. The data comprise estimated free energies of formation for such gases as SeO, SeS, TeO, TeS, BiO, BiS, SbO, SbS, AsO, and AsS, as well as activity coefficients in dilute copper alloys and vapor pressures of various elements and compounds. The volatilization of minor elements in steady-state reactors comprising gas and several condensed phases is mathematically formulated, and a parameter which governs the volatilization in such reactors is defined and named volatilization constant. The vapor pressures of various volatile species are calculated thermodynamically for the Noranda Process reactor by assuming equilibrium conditions. The volatilization constants of various minor elements are expressed explicitly as functions of oxygen and sulfur activities. Formerly Associate Professor, Department of Metallurgical Engineering, University of Utah, Salt Lake City, UT     

Bits, symbols, bauds, and bandwidth

The use of clear, concise, and unambiguous language in telecommunications engineering is vital to communicate a desired meaning and understanding. Terminology should be based on rigorous engineering principles and traceable to well known and dependable sources. This article deals with four everyday terms commonly encountered in the popular semi-technical press as well as in serious engineering periodicals. The misuse of these and other terms can lead to low-balled cost proposals, court litigation, and patent infringement cases. Imagine how an engineering student can be confused when she/he typically encounters bandwidth measured in bits per second     

Novel planar, square-shaped, dielectric-waveguide, single-, and dual-mode filters

This paper presents a novel concept of a square-shaped dielectric-waveguide resonator, which can easily realize a dielectric-waveguide cross-coupled filter or a dielectric-waveguide dual-mode filter, using the conventional printed circuit board (PCB) process. This planar dielectric-waveguide resonator has a higher Q value than a microstrip resonator. The physical mechanisms of both single- and dual-mode filters are elucidated. Some new coupling structures are developed for undergoing the PCB process. Filter design procedures are detailed. Design curves for the coupling coefficients of internal- and external-coupling structures are determined by full-wave finite-element-method electromagnetic calculations. Measurement results are highly consistent with theory for all trial filters. This study offers an effective means of producing low-cost high-performance planar circuit filters.     

PBX技术.市态.营销.选购

本文介绍了ＰＢＸ交换机的技术及市场需求态势。并提出ＰＢＸ产品的营销要素及其用户在选购时应遵循的原则。     

Dilemmas,uncertainty, risks,and board performance

This paper traces the origins of the words risk, uncertainty, governance and development and argues that a deeper understanding of each allows more effective decision taking in the boardroom. It argues that the role of the board of directors is to balance and rebalance continuously their irresolvable dilemma — ‘how do we drive our enterprise forward while keeping it under prudent control?’ It argues that it is the board’s role to focus on uncertainty, rather than risk, and this requires a different set of intellectual skills from board members to be able to cope with monitoring a range of diverse scenarios. This is crucial for a board to develop stronger ways of both leading their organisation and of ensuring the connectedness of the learning within and between the board and the operational unit’s risk taking. It advocates that to achieve this a board must develop new ways of learning — especially of thinking strategically and becoming more sensitised to the dynamics of their changing external environments. This will take them well beyond the comforts of their specialist managerial disciplines and into the true world of directing. The paper demonstrates the importance of continuous learning in reducing organisational uncertainty and risk. It uses the ‘Learning Board’ process and model as the central processor of both strategic and operational learning to create an annual rhythm for the board’s year.