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SPICE MODELING OF COMPOUND SEMICONDUCTOR DEVICES

International Journal of High Speed Electronics and systems 1998年第3期9卷 725-781页

作者： BENJAMIN IÑIGUEZ TOR A. FJELDLY MICHAEL S. SHUR TROND YTTERDAL Microelectronics Laboratory DICE Univeristé Catholique de Louvain (UCL) Louvain-la-Neuve B-1348 Belgium Center for Technology at Kjeller Norwegian University of Science and Technology N-2027 Kjeller Norway Electrical Computer and Systems Engineering Department Rensselaer Polytechnic Institute Troy NY 12180-3590 USA Nordic VLSI ASA N-7075 Trondheim Norway

We review recent advances in the modeling of novel and advanced semiconductor devices, including state-of-the-art MESFET and HFETs, heterodimensional FETs, resonant tunneling devices, and wide-bandgap semiconductor transistors. We emphasize analytical, physics-based modeling incorporating the important effects present in modern day devices, including deep sub-micrometer devices. Such an approach is needed in order to accurately describe and predict both stationary and dynamic device behavior and to make the models suitable for implementation in advanced computer aided design tool including circuit simulators such as SPICE.

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A Low-Power Encoder for Pyramid Vector Quantization of Subband Coefficients

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Journal of vlsi Signal Processing systems for Signal, Image, and Video Technology 1997年第1期16卷 9-23页

作者： Namgoong, Won Meng, Teresa H. Computer Systems Laboratory Stanford University Stanford CA 94305 United States University of California Berkeley CA United States Stanford University United States Stanford University School of Engineering United States Tau Beta Pi Eta Kappa Nu United States Electrical Engineering Department Stanford University United States National Taiwan University Taiwan IEEE Workshop on VLSI Sign. Proc.

A real-time, low-power video encoder design for pyramid vector quantization (PVQ) has been presented. The quantizer is estimated to dissipate only 2.1 mW for real-time video compression of images of 256 × 256 pixels at 30 frames per second in standard 0.8-micron CMOS technology with a 1.5 V supply. Applying this quantizer to subband decomposed images, the quantizer performs better than JPEG on average. We achieve this high level of power efficiency with image quality exceeding that of variable rate codes through algorithmic and architectural reformulation. The PVQ encoder is well-suited for wireless, portable communication applications.

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CONCURRENT LARGE-SIGNAL SIMULATION OF AN ACTIVE MICROSTRIP ANTENNA

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INTERNATIONAL JOURNAL OF NUMERICAL MODELLING-ELECTRONIC NETWORKS DEVICES AND FIELDS 1995年第1期8卷 3-12页

作者： MCDOWALL, DS FUSCO, VF High Frequency Electronics Laboratory. Department of Electrical and Electronic Engineering The Queen's University of Belfast Ashby Building Stranmillis Road Belfast BT9 5AH U.K. D. Stewart McDowall was born in Dublin Republic of Ireland in 1967. He received the M. Eng. degree in Electrical and Electronic Engineering from the Queen's University of Belfast in 1990. In the same year he was presented with a Distinction Award from the Departmnet of Education of Northern Ireland and he is currently pursuing his Ph.D. in the Microwave Research Group at Q.U.B. His principal research area is the electromagnetic field mapping of microwave systems using concurrent programming. He is an Associate Member of the Institute of Electrical Engineers. Vincent F. Fusco was educated at the Queens's University of Belfast where he obtained the degree of Ph.D. in 1982. He has worked as a research engineer on short-range radar and radio telemetry systems. Currently he is a reader in Microwave Communications in the School of Electrical engineering and Computer Science the Queen's University of Belfast. His current research interests include non-linear microwave circuit simulatino and concurrent programming techniques for electromagnetic field problems with particular emphasis on EMC applications. He has published numerous research papers in these areas. He is the author of the bookMicrowave Circuits Analysis and Computer Aided Design Prentice-Hall 1987. Dr Fusco is a Chartered Electrical Engineer and a Member of the Institute of Electrical Engineers.

This paper details the use of a circuit-based EM modelling technique combined with a harmonic balance simulator used to model the radiation from the microstrip bodies comprising an active antenna circuit. The modelling approach adopted for the planar bodies in the circuit will be shown to allow the use of concurrent algorithms in order to reduce overall computational time.

关键词： Microstrip antennas

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PARALLEL AND DISTRIBUTED TLM COMPUTATION WITH SIGNAL-PROCESSING FOR ELECTROMAGNETIC-FIELD MODELING

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INTERNATIONAL JOURNAL OF NUMERICAL MODELLING-ELECTRONIC NETWORKS DEVICES AND FIELDS 1995年第3-4期8卷 169-185页

作者： SO, PPM ESWARAPPA, C HOEFER, WJR NSERC/MPR Teltech Research Chair in RF Engineering Department of Electrical and Computer Engineering University of Victoria Victoria British Columbia V8W 3P6 Canada Poman So received his B.Sc. degree in computer science and physics from the University of Toronto Toronto Onatario Canada in 1985. He obtained his B.A. Sc. and M.A.Sc. degrees in electrical engineering (summa cum laude) from the University of Ottawa Ottawa Ontario Canada in 1987 and 1989 respectively. Mr So was a research engineer in the University of Ottawa from January 1989 to October 1991 his research interests included CAD techniques of microwave circuits and numerical methods for electromagnetic wave modelling. He specialized in the development of electromagnetic engineering CAD software and successfully implemented a number of electromagnetic wave simulators based on the two-dimensional and three-dimensional transmission-line matrix methods. From August 1990 to February 1991 he accompanied Professor W. J. R. Hoefer to Rome Italy and Sophia Antiopolas France. During that time he implemented a parallel version of the 3D-TLM simulator for the CM-2 Connection Machine using C-Star and X Windows Library. He is a research engineer and a Ph.D. student at the University of Victoria Victoria British Columbia Canada. He ported the 2D- and 3D-TLM simulators to DECmpp 1200 massively parallel computer using MPL C and C++. He also combined OSA90/hope a commercially available microwave CAD program with a 2D-TLM simulation module for geometry optimization using the Datapipe technique of OSA90/hope. Recently he has developed a distributed client-server computing technique for the TLM method this technique could accelerate the TLM simulation by more than an order of magnitude. Channabasappa Eswarappa received the M.Tech. degree in electrical engineering from the Indian Institute of Technology Kanpur India in 1983 and Ph. D. degree from the University of Ottawa Canada in 1990. He worked as an Assistant Executive Engineer and later as

This paper describes the implementation of transmission-line matrix (TLM) method algorithms on a massively parallel computer (DECmpp 12000), the technique of distributed computing in the UNIX environment, and the combination of TLM analysis with Prony's method as well as with autoregressive moving average (ARMA) digital signal processing for electromagnetic field modelling. By combining these advanced computation techniques, typical electromagnetic field modelling of microwave structures by TLM analysis can be accelerated by a few orders of magnitude.

关键词： Mathematical models

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A versatile algorithm for two-dimensional symmetric noncausal modeling

A versatile algorithm for two-dimensional symmetric noncausa...

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IEEE International Conference on Image Processing

作者： G.-O. Glentis C.H. Slump O.E. Herrmann Department of Electrical Engineering Control Systems and Computer Engineering Group (BSC) Laboratory for Network Theory and VLSI-Design University of Twente Enschede Netherlands

In this paper a novel algorithm is presented for the efficient two-dimensional (2-D) symmetric noncausal finite impulse response (FIR) filtering and autoregressive (AR) modeling. Symmetric filter masks of general boundaries are allowed. The proposed algorithm offers the greatest maneuverability in the 2-D index space in a computational efficient way. This flexibility can be taken into advantage if the shape of the 2-D mask is not a priori known and has to be dynamically configured.< >

关键词： Finite impulse response filter Nonlinear filters Autocorrelation Equations Vectors Virtual manufacturing Filtering algorithms Control system synthesis Control engineering computing computer networks

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Efficient two-dimensional ARX modeling

Efficient two-dimensional ARX modeling

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IEEE International Conference on Image Processing

作者： G.-O. Glentis C.H. Slump O.E. Herrmann Department of Electrical Engineering Control Systems and Computer Engineering Group BSC Laboratory for Network Theory and VLSI-Design University of Twente Enschede Netherlands

In this paper a fast spatial adaptive algorithm is presented for the efficient least squares (LS), autoregressive exogenous (ARX), two-dimensional (2-D) modeling. Filter masks of general boundaries are allowed. Efficient space updating recursions are developed by exploiting the spatial shift invariance property of the 2-D data set.< >

关键词： Least squares methods Finite impulse response filter Image edge detection Equations Shape Vectors Control systems Control engineering computing computer networks systems engineering and theory

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A novel input differential pair for improved-linearity buffer and S/H amplifier design

A novel input differential pair for improved-linearity buffe...

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IEEE International Symposium on circuits and systems (ISCAS)

作者： K. Hadidi G.C. Temes Integrated Circuits and Systems Laboratory UCLA Los Angeles CA USA Electrical and Computer Engineering Department Oregon State University Corvallis OR USA

As the speed and linearity requirements become harder to meet for analog circuits, it is no longer enough to rely on feedback to enhance linearity. Negative feedback suppresses nonlinearities by a factor equal to the loop gain. This works well at low signal frequencies, but as the signal frequency increases the loop gain drops. Thus, with a limited bandwidth available, nonlinearities should be suppressed at their origin. In this paper, we consider a major source of nonlinearity, namely the input differential pair (IDP) with a cascode current source, commonly used in op-amps. Then a new and simple IDP with a matched channel-length single-device current source is introduced. We show that the modified IDP is more linear and thus creates less harmonics than conventional ones, and that by satisfying a nonrestrictive condition all even harmonics can be eliminated. Experimental results are described which verify the expected reduction of harmonic distortion.< >

关键词： Differential amplifiers Linearity Operational amplifiers Voltage Harmonic distortion Tail Negative feedback Frequency Broadband amplifiers Transconductance

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A high resolution, low offset and high speed comparator

A high resolution, low offset and high speed comparator

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14th Annual Custom Integrated circuits Conference, CICC 1992

作者： Hadidi, K. Temes, G.C. Integrated Circuits and Systems Laboratory University of California Los Angeles CA 90024 United States Electrical and Computer Engineering Department Oregon State University Corvallis OR 97331-3211 United States Yokogawa Electric Co. Tokyo Japan

ISBN: (纸本)078030246X

This paper describes a CMOS comparator which uses a novel feedforward autozeroing circuitry to obtain high speed and low threshold uncertainty. Fabricated in a standard 2μm digital CMOS process, it achieved an input resolution of 0.23mV at a comparison speed of 30MS/s. The residual offset (included in the 0.23 mV resolution) was less than 100μV. The circuit consumes 5mW from a single 5Volt supply. The active area for the circuit is 0.33 × 0.4 mm2. © 1992 IEEE.

关键词： Comparators (optical)

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A High Resolution, Low Offset And High Speed Comparator

A High Resolution, Low Offset And High Speed Comparator

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Custom Integrated circuits Conference (CICC)

作者： K. Hadidi G.C. Temes Integrated Circuits and Systems Laboratory University of California Los Angeles CA USA Electrical and Computer Engineering Department Oregon State University Corvallis OR USA

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A True 16-bit 20 KHZ Multibit ΣΔ ADC with digital Correction

A True 16-bit 20 KHZ Multibit ΣΔ ADC with digital Correcti...

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Custom Integrated circuits Conference (CICC)

作者： M. Sarhang-Nejad G.C. Temes Integrated Circuits and Systems Laboratory University of California Los Angeles Los Angeles CA USA Electrical and Computer Engineering Department Oregon State University Corvallis OR USA

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