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Field effect diode for effective CDM ESD protection in 45 nm SOI technology

Field effect diode for effective CDM ESD protection in 45 nm...

引用

Annual International Symposium on Reliability Physics

作者： Shuqing Cao Stephen G. Beebe Akram A. Salman Mario M. Pelella Jung-Hoon Chun Robert W. Dutton Integrated Circuits Laboratory Electrical Engineering Department University of Stanford Stanford CA USA Advanced Micro Devices Inc. Sunnyvale CA USA Texas Instruments Inc. Dallas TX USA Tau-Metrix Inc. Santa Clara CA USA Department of Semiconductor Systems Engineering SungKyunKwan University Suwon South Korea

In this paper, the improved field-effect diode (FED) has been characterized and modeled in 45 nm silicon-on-insulator (SOI) technology. It has been experimentally shown to be suitable for pad-based local clamping under normal supply voltage (V dd ) range (below 1 V) in high-speed integrated circuits. ESD protection capabilities are investigated using very fast transmission line pulse (VF-TLP) tests to predict the device's performance in charged device model (CDM) ESD events. The FED's advantages in improving transient turn-on behavior and reducing DC leakage current have been analyzed and compared with other silicon-controlled-rectifier (SCR)-based SOI device variations. Technology CAD (TCAD) simulations are used to interpret the turn-on behavior and the physical effects. Process tradeoffs have been evaluated. The work prepares the device for being directly applied to high-speed input/output (I/O) circuit and it addresses the severe challenge in CDM ESD protection. The improved device enables the adoption of local clamping scheme that expands the ESD design window.

关键词： Diodes Electrostatic discharge Protection Silicon on insulator technology Integrated circuit technology Clamps Voltage High speed integrated circuits distributed parameter circuits Circuit testing

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Transient Analysis of Power Grid Networks via Waveform Relaxation Techniques

Transient Analysis of Power Grid Networks via Waveform Relax...

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IEEE MTT-S International Microwave Workshop Series (IMWS)

作者： Harjot Dhindsa Arvind Sridhar Ram Achar Michel Nakhla Douglas Paul Carleton University Ottawa ONT Canada

This paper presents a fast algorithm for transient simulation of power grids in VLSI systems using waveform relaxation techniques. Novel partitioning methods and convergence accelerators are developed for fast convergence of waveform relaxation iterations when applied to power grid networks. Unlike the direct solvers, the new method is highly parallelizable and yields significant speedups. Numerical examples are presented to demonstrate the validity and efficiency of the proposed method.

关键词： Transient analysis Power grids Finite difference methods Integrated circuit interconnections distributed parameter circuits Time domain analysis Transmission lines Signal analysis Voltage Wavelet analysis

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Application of Synchronous Static Series Compensator (SSSC) on enhancement of voltage stability and power oscillation damping

Application of Synchronous Static Series Compensator (SSSC) ...

引用

Eurocon

作者： H. Taheri S. Shahabi Sh. Taheri A. Gholami Electrical Engineering Department University of Mazandaran Babol Iran Electrical Engineering Department Iran University of Science and Technology Tehran Iran

This paper investigates the problem of controlling and modulating power flow in a transmission line using a Synchronous Static Series Compensator (SSSC). The studies, which include detailed techniques of twelve- pulse and PWM controlled SSSC, are conducted and the control circuits are presented. The developed control strategies for both twelve-pulse and PWM-controlled SSSC use direct manipulations of control variables instead of typical d-q transformations. The complete digital simulation of the SSSC within the power system is performed in the MATLAB/Simulink environment using the Power System Blockset (PSB). Simulation results validate that Voltage and Power Oscillation can be damped properly using of Synchronous Static Series Compensator (SSSC).

关键词： Voltage Damping Pulse width modulation Power system simulation Pulse power systems Circuit stability Load flow Power transmission lines distributed parameter circuits Pulse circuits

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On series compensation impact on line protection and TRV

On series compensation impact on line protection and TRV

引用

Annual North-American Power Symposium

作者： Rolf Grünbaum Kent Wikström Göran Strömberg FACTS ABB AB Västerås Sweden

ISBN: (纸本)9781424444281

Series capacitors are a well established concept within electric power transmission, finding ever increasing use in EHV and UHV transmission grids to provide benefits such as improved voltage and transient stability of long lines as well as improved power division between parallel lines. Series capacitors in a transmission line can have a significant effect on the transient voltage that appears across the contacts of a circuit breaker when opening to clear a fault and the series capacitor into the line makes the line protection more complex due to the abrupt change in line series impedance at the series capacitor. These topics are discussed in this paper.

关键词： Protection Capacitors Voltage Power system transients Power systems Circuit stability Power transmission lines distributed parameter circuits Circuit breakers Circuit faults

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Analysis of reconfigurable tap changing transformer model through analog emulation

Analysis of reconfigurable tap changing transformer model th...

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IEEE International Symposium on circuits and Systems (ISCAS)

作者： Juan C. Jimenez Chika O. Nwankpa Department of Electrical and Computer Engineering Drexel University Philadelphia USA

ISBN: (纸本)9781424438273

Emulation of power systems is a viable alternative to traditional digital methods as it provides certain advantages such as physically realizable solutions and faster computation times. Accurate analog models of power systems components are required in order to realize an analog computation engine for power systems. Prior research in this field has modeled generators, transmission lines and loads. Other components have significant influence on the power systems, such as tap changing transformers. Effects of tap changing transformers on voltage stability have been a continuing area of research. In this paper, a circuit model design to emulate the behavior of a tap changing transformer is validated. It is important to demonstrate how this reconfigurable analog model may be utilized in load flow studies. Such demonstration is presented by comparing steady-state emulation and simulation results for a test case in which a power system experiences slow gradual changes in load.

关键词： Emulation Power system modeling Power system stability Power system analysis computing Power system simulation Physics computing Analog computers Engines Power transmission lines distributed parameter circuits

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A miniaturized double-stage 3dB broadband branch-line hybrid coupler using distributed capacitors

A miniaturized double-stage 3dB broadband branch-line hybrid...

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Asia-Pacific Conference on Microwave

作者： Sung-Chan Jung Renato Negra Fadhel. M. Ghannouchi KIPS Center Samsung Techwin Company Limited Seoul South Korea Signal CMOS Circuits RWTH Aachen University Germany IRadio Laboratory Electrical and Computer Engineering Department Schulish School of Engineering University of Calgary Calgary AB Canada

A miniaturized double-stage 3 dB branch-line hybrid coupler using distributed capacitors in the inner area is proposed in this paper. It is composed of high impedance transmission lines with reduced length and distributed capacitors. Compared to a conventional double-stage branch-line hybrid coupler, which is typically used to obtain wider bandwidth than a single-stage approach can provide, the proposed topology allows for considerable size reduction, while maintaining similar electrical performance. For experimental validation, a conventional single-stage 3 dB hybrid coupler, a conventional double-stage, and a miniaturized double-stage hybrid couplers are designed and fabricated. The size of the proposed miniaturized double-stage 3 dB broadband branch-line hybrid coupler is reduced by 39.04% and 68.32% compared to a single-stage and a conventional double-stage branch-line hybrid coupler, respectively.

关键词： Capacitors Coupling circuits distributed parameter circuits Bandwidth Equivalent circuits Impedance Fabrication Transmission lines Complexity theory Shunt (electrical)

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C# tools for Communications Engineering

C# tools for Communications Engineering

引用

International Symposium on Electronics in Marine (ELMAR)

作者： Slavica Cosovic Bajic Kresimir Kavran Polytechnic of Zagreb Zagreb Croatia

In this paper C# programs for Radio Communication are given. This programs is used in teaching students on the Electrical Engineering Department at Polytechnic of Zagreb. The capabilities of the programs are given. So... 详细信息

关键词： Dipole antennas Impedance Power transmission lines Coupling circuits Broadband antennas Radio communication distributed parameter circuits Frequency Directive antennas Log periodic antennas

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Design of broadband impedance transformer using coupled microstrip transmission lines

Design of broadband impedance transformer using coupled micr...

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International Symposium on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications (MAPE)

作者： Xiang Zhou Xue-guan Liu Hui-ping Guo Lv-xia Shao School of Electronics and Information Engineering Soochow University Suzhou Suzhou P.R. China

In this paper, a novel broadband impedance transformer combining with a symmetric coupled microstrip line and an interconnecting line is presented. It has been proved that a fractional bandwidth of about 90% at -20 dB reflection level can be achieved with this structure, and the insert loss is less than 2 dB in the matching bandwidth. The measurement results of actual circuit are well agreed with the simulation. Its bandwidth is 2.5 times larger as compared with the traditional quarter-wavelength impedance transformer, and its length is less than half of the traditional one with the help of bending the structure.

关键词： Microstrip Transmission lines Bandwidth Power transmission lines Transmission line theory Coupling circuits Impedance matching distributed parameter circuits Circuit simulation Electromagnetic coupling

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Aperture coupled, differentially fed DRAs

Aperture coupled, differentially fed DRAs

引用

Asia-Pacific Conference on Microwave

作者： Lee Ee Michael Ling Chuen Ong Institute for Infocomm Research Singapore Singapore Institute for Infocomm Research Singapore

Antennas with differential signaling is of interest due to their inherent common mode noise rejection ability and their compatibility with existing differential circuits. To our knowledge, very little works have been done to exploit these intrinsic benefits in DRA structures. In this paper, a simple differential scheme based on the aperture coupling technique is shown to be suitable for coupling energy into the DRA. As the feeding method and the antenna structure are de-coupled from each other via the ground plane, this method also allow the differential circuit to coupled energy directly into an as-symmetrical antenna; such as a quarter-wave DRA. The reduction in size makes the proposed compact differential DRA extremely appealing for mobile applications. Simulation and experimental data will be presented to validate the proposed DRA designs.

关键词： Dielectric resonator antennas Microstrip antennas Coupling circuits Aperture antennas Antenna feeds Receiving antennas Reflection distributed parameter circuits Probes Slot antennas

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Frequency tuning of a CRLH CPW antenna on ferrite substrate by magnetic biasing field

Frequency tuning of a CRLH CPW antenna on ferrite substrate ...

引用

European Conference on Microwave

作者： Gheorghe Sajin Stefan Simion Florea Craciunoiu Andrei Muller Alina Cristina Bunea National Research Institute for Microtechnology Bucharest Romania

The aim of this paper is to present results obtained with magnetically tuned Composite Right/Left Handed Coplanar Waveguide (CRLH CPW) zeroth-order resonating antenna on ferrite substrate. The CRLH structure consists of series connected CPW interdigital capacitors and parallel connected CPW transmission lines. The experiments demonstrate an antennas frequency tuning of approximately 450 MHz as a result of the variation of a magnetic biasing field between 0 T and 0.26 T.

关键词： Frequency Tuning Coplanar waveguides Ferrites Capacitors Transmission line theory distributed parameter circuits Capacitance Transmission line antennas Chromium

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