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Tools to aid in wiring rule generation for high speed interconnects

Tools to aid in wiring rule generation for high speed interc...

引用

Design Automation Conference

作者： P. Franzon S. Simovich M. Steer M. Basel S. Mehrotra T. Mills Picosecond Digital Electronics Laboratory Department of Electrical and Computer Engineering North Carolina State University Raleigh NC USA

The MetaSim allows multiple simulation studies to be automatically specified, conducted, and analyzed in such a fashion so as to produce wiring rules for layout tools. The authors describe the operation of MetaSim and give an example of its use. One of MetaSim's current engines, Transim, is a convolution simulator that incorporates a robust, rapid, and accurate method for the simulation of coupled, lossy interconnect structures specified with frequency-dependent parameters. Transim solves the problem of incorporating transient circuit simulation with nonlinear devices, with transmission line simulation in the frequency domain.< >

关键词： Wiring Circuit simulation Integrated circuit interconnections Analytical models Engines Convolution Robustness Coupling circuits Frequency Power system transients

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The impact of delay spread on multilevel FM systems in a Rayleigh fading, CCI and AWGN environment

The impact of delay spread on multilevel FM systems in a Ray...

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IEEE Conference on Vehicular Technology (VTC)

作者： G.K. Wu K. Feher Digital Communications Research Laboratory Department of Electrical and Computer Engineering University of California슠Davis Davis CA USA Consulting Group DIGICOM Inc. USA

An experimental study of the impact of delay spread on the performance of 4 PAM-FM mobile systems in a Rayleigh fading, cochannel interference (CCI) and additive white Gaussian noise (AWGN) environment is presented. The increase of the modulation index can improve the BER if the reflected signal power is 10 dB less than the direct signal in the two-ray fading model. A strategy which reduces the impact of delay spread even in the worst case situation is proposed. By increasing the roll-off factor of the lowpass filters and by lowering the modulation index, for a BER of 0.01, the delay spread immunity is increased 300% without the need for adaptive equalization. In the delay spread environment, CCI is not significant if it is less than -20 dB. AWGN interference is noticeable only when it is higher than -13 dB.< >

关键词： Delay AWGN Rayleigh channels Radiofrequency interference Modulation Bit error rate Interchannel interference Additive white noise Power system modeling Adaptive filters

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An experimental system for optical detection of layout errors of printed circuit boards using learned CNN templates 2

An experimental system for optical detection of layout error...

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2nd International Workshop on Cellular Neural Networks and their Applications, CNNA 1992

作者： Szolgay, P. Kispál, I. Kozek, T. Dual and Neural Computing Systems Laboratory Computer and Automation Institute Hungarian Academy of Sciences P.O.B.63 BudapestH-1502 Hungary Department of Information Technology Faculty of Engineering University of Veszprém Egyetem u. 10 VeszprémH-8201 Hungary

ISBN: (纸本)0780308751

Cellular neural networks (CNNs) are considered here as cellular analog programmable multidimensional processing arrays with distributed logic and memory. The interconnecting weights between the neighbouring processing elements are defined by the template *** the paper a new systematic way is presented to find robust templates. Using the new learning algorithm some templates were found for a CNN based layout design rule checking algorithm. The algorithm has been tested in our experimental system with real life examples. A typical design rule checking of a 432×164 pixels area takes 8s computation time on our CNN hardware accelerator board. © 1992 IEEE.

关键词： Cellular neural networks

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Boundary-scan test structures and test-bench compilation in a multichip module synthesis system

Boundary-scan test structures and test-bench compilation in ...

引用

IEEE Conference on Multi-Chip Module

作者： R. Vutukuru P. Subbarao R. Vmuri Laboratory for Digital Design Environments Department of Electrical and Computer Engineering University of Cincinnati Cincinnati OH USA Dept. of Electr. & Comput. Eng. Cincinnati Univ. OH USA

The authors present a testing methodology for multichip module (MCM) designs, which were automatically generated by a behavioral synthesis system. The testability of the design was enhanced by automatic insertion of boundary scan architecture in every chip of the MCM design. The test vectors for the synthesized design were automatically derived from the behavioral test vectors, which were used to validate the behavioral model of the design. The test vectors were transformed into a serial format as required by the test structures and finally represented in WAVES.< >

关键词： system testing Multichip modules Circuit testing Automatic testing Electronic equipment testing Libraries Signal synthesis Signal processing Design methodology Circuit synthesis

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Wideband beamforming using fan filter

Wideband beamforming using fan filter

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IEEE International Symposium on Circuits and systems (ISCAS)

作者： K. Nishikawa T. Yamamoto K. Oto T. Kanamori Department of Electrical and Computer Engineering Faculty of Technology Kanazawa University Japan Hokuriku Bank Japan Pioneer Company Limited Japan Acoustic Research Laboratory Matsushita Elecrric Indusrrial Company Limited Kadoma Osaka Japan

A novel approach to wideband beamforming using FIR (finite impulse response) fan filters is presented. The method is based on two-dimensional filtering for the outputs of a linear array of sensors. To beamform in the broadside of the array, a symmetrical 90 degrees /n filter is employed. The filter in which the angle of fan is more acute can form the narrower beam over the full band while the order of the filter becomes higher. To beamform in the direction along the array, an asymmetrical 45 degrees fan filter is used. As aliasing occurs in this beamforming, the band which is available is limited a little in width. A general implementation of the FIR fan filter beamformer is given as the parallel connection of one-dimensional FIR filters.< >

关键词： Wideband Array signal processing Finite impulse response filter Sensor arrays Frequency digital filters Passband Band pass filters Laboratories Acoustical engineering

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Optical tracking system for automatic guided vehicles using cellular neural networks

Optical tracking system for automatic guided vehicles using ...

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IEEE International Workshop on Cellular Nanoscale Networks and their Applications, (CNNA)

作者： G. Eross T. Boros A. Kiss A. Radvanyi T. Roska J. Bito J. Vass Centre of Robotics and Automation Tungsram TH Company Limited Budapest Hungary Dual and Neural Computing Systems Laboratory Computer and Automation Research Institute Hungarian Academy of Sciences Budapest Hungary Department of information Technology Faculty of Engineering University of Veszprém Veszprem Hungary

A method for the path-control of automated guided vehicles (AGVs) in computer integrated manufacturing (CIM) systems that combines the flexibility and easy installation of optical methods with the simplicity and robustness of the inductive method is proposed. Using a new computing paradigm, the cellular neural network (CNN), and a related device, the VLSI CNN chip, a very high speed solution that is less expensive than the conventional methods can be achieved. This AGV control complies with the requirements of CIM systems. Further advantages of the proposed system are as follows: fault tolerance and the ability to give instructions along the path, and the use of a simple local control.< >

关键词： Vehicles computer integrated manufacturing Cellular neural networks High speed optical techniques Control systems Integrated optics Optical computing Robustness computer networks Very large scale integration

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Development of miniature cybernetic actuator driven by piezoelectric device

Development of miniature cybernetic actuator driven by piezo...

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Proceedings IROS '91:IEEE/RSJ International Workshop on Intelligent Robots and systems '91

作者： K. Ikuta A. Kawahara Y. Tsutsui Department of Mechanical System Engineering Faculty of Computer Science and System Engineering Kyushu Institute of Technology Fukuoka Japan Research Laboratory Yaskawa Electric Manufacturing Company Limited Kitakyushu Japan

New types of miniature actuators so called cybernetic actuator for biomedical robotics are developed. The cybernetic actuator has four driving states: free, increasing, decreasing and lock. The state of free and lock provides safety characteristics for both human and mechanism by avoiding damage from overload. The rotary type and linear type of cybernetic actuators are designed and developed. Feasibility of both actuators is verified by experiments. Four driving states are confirmed and unique driving principle is verified successfully.< >

关键词： Cybernetics Piezoelectric actuators Piezoelectric devices Humans Pneumatic actuators Safety Hydraulic actuators Muscles Mechanical systems systems engineering and theory

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Miniature cybernetic actuators using piezoelectric device

Miniature cybernetic actuators using piezoelectric device

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IEEE International Conference on Micro Electro Mechanical systems

作者： K. Ikuta A. Kawahara S. Yamazumi Department of Mechanical System Engineering Faculty of Computer Science and System Engineering Kyushu Institute of Technology Fukuoka Japan Research Laboratory Yaskawa Electric Manufacturing Company Limited Kitakyushu Japan

A new type of miniature actuator, the so-called cybernetic actuator, for medical application has been proposed and developed. The cybernetic actuator has four driving states: free, increasing, decreasing and locked. A rotary-type cybernetic actuator and a linear-type cybernetic actuator driven by piezoelectric devices have been constructed. The feasibility of both actuators was verified by driving experiments.< >

关键词： Cybernetics Piezoelectric actuators Piezoelectric devices Pneumatic actuators Humans Hydraulic actuators Muscles Friction Mechanical systems Biomedical engineering

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Kerr constant frequency dependence in liquid nitrogen

Kerr constant frequency dependence in liquid nitrogen

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International Conference on Properties and Applications of Properties and Applications of Dielectric Materials

作者： K. Imai A. Kanematsu M. Nawata M. Zahn Department of Electrical and Electronic Engineering Faculty of Science and Technology Meijo University Nagoya Japan Department of Electrical Engineering and Computer Science Laboratory for Electromagnetic and Electronic System High Voltage Research Laboratory Massachusetts Institute of Technology Cambridge MA USA

Kerr electro-optic field mapping measurements using the sensitive AC modulation method were made in liquid nitrogen. The steady-state electric fields between parallel stainless steel electrodes that had a gap of 7 mm are shown to be essentially uniform for voltages up to 70 kV with no significant space charge distortion. The Kerr constant B of liquid nitrogen is constant over the AC modulation frequency range of 1-20 kHz, while increasing above 20 kHz. This change of B with the modulation frequency coincides with the frequency-amplitude gain characteristic of the lock-in amplifier used, so that B is independent of the AC modulation frequency within the range of this study. B monotonically decreases with increasing temperature, T, thus decreasing liquid nitrogen density, rho , so that B is related linearly to rho /T. The polarizability anisotropy of liquid nitrogen is evaluated to be 8.3*10/sup -41/ F-m/sup 2/ from the slope of the B-( rho /T) characteristic, obtained from a simple physical model.< >

关键词： Frequency dependence Nitrogen Chirp modulation Frequency modulation Distortion measurement Electrooptic modulators Steady-state Electric fields Steel Electrodes

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Modems for US digital cellular and emerging digital mobile radio systems

Modems for US digital cellular and emerging digital mobile r...

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IEEE International Conference on Communications (ICC)

作者： K. Feher Digital Communications Research Laboratory Department of Electrical Engineering and Computer Science UC Davis University of California Davis CA USA

The spectral/power efficiency and performance of the pi /4-quadrature phase-shift keying (QPSK) modems (American and Japanese digital cellular emerging standards) are studied and briefly compared to GMSK modems (proposed for European digital European Cordless Telephone system) (DECT) and Group Special Mobile system (GSM) cellular standards). Improved filtering strategies and digital pilot aided (digital channel sounding) techniques are considered for pi /4-QPSK and for other digital modems. More spectrally efficient modem trends and some research results for future cellular/mobile (land mobile) and satellite communication systems applications are also highlighted.< >

关键词： Modems Land mobile radio Standards development Telecommunication standards Communication standards Telephony USA Councils Radio frequency GSM Base stations

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