Download or read book Thermal Models for Low and High power GaAs MESFET Devices written by and published by . This book was released on 1904 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The paper addresses the problem of thermal design of MESFET devices. Two CAD models are pro posed for performance evaluation: a closed-form thermal resistance model and a two-dimensional self-consistent coupled physical model. The two models are complementary and allow both to optimize the geometry and to correctly estimate the small-scale temperature distribution and the influence of heating on the electrical perfor mances, Results from both models are discussed and compared with measurements.
Download or read book Two Dimensional Numerical Simulation of a Non isothermal GaAs MESFET written by Angela A. Lin and published by . This book was released on 1992 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: The low thermal conductivity of gallium arsenide compared to silicon results in self-heating effects in GaAs MESFETs that limit the electrical performance of such devices for high power applications. To date, analytical thermal models of self heating in GaAs MESFETs are based on the assumption of a uniformly heated channel. This thesis presents a two dimensional analysis of the electrothermal effect of this device based on the two dimensional power density distribution in the channel under various bias conditions. The numerical simulation is performed using the finite difference technique. The results of the simulation of an isothermal MESFET without heat effects is compared with various one dimensional analytical models in the literature. Electro thermal effects into the two-dimensional isothermal MESFET model allowed close examination of the temperature profile within the MESFET. The large gradient in power distribution results in a localized heat source within the channel which increases the overall channel temperature, which shows that the assumption of a uniformly heated channel is erroneous, and may lead to an underestimation of the maximum channel temperature.
Download or read book Materials for High Temperature Semiconductor Devices written by National Research Council and published by National Academies Press. This book was released on 1995-09-14 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: Major benefits to system architecture would result if cooling systems for components could be eliminated without compromising performance. This book surveys the state-of-the-art for the three major wide bandgap materials (silicon carbide, nitrides, and diamond), assesses the national and international efforts to develop these materials, identifies the technical barriers to their development and manufacture, determines the criteria for successfully packaging and integrating these devices into existing systems, and recommends future research priorities.
Download or read book Electrical and Thermal Characterization of MESFETs HEMTs and HBTs written by Robert Anholt and published by Artech House Microwave Library. This book was released on 1995 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: Encompassing three important technologies, this book explains why III-V transistor device electrical characteristics change with temperature, and develops models of the temperature change for use in integrated circuit design programs. You'll find a wealth of experimental S-equivalent-circuit parameter data on a wide variety of devices that has never before been presented, as well as learn how to measure S-parameters and fit equivalent circuits. Includes 200 equations and 181 illustrations.
Download or read book Compound Semiconductor Device Modelling written by Christopher M. Snowden and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 295 pages. Available in PDF, EPUB and Kindle. Book excerpt: Compound semiconductor devices form the foundation of solid-state microwave and optoelectronic technologies used in many modern communication systems. In common with their low frequency counterparts, these devices are often represented using equivalent circuit models, but it is often necessary to resort to physical models in order to gain insight into the detailed operation of compound semiconductor devices. Many of the earliest physical models were indeed developed to understand the 'unusual' phenomena which occur at high frequencies. Such was the case with the Gunn and IMPATI diodes, which led to an increased interest in using numerical simulation methods. Contemporary devices often have feature sizes so small that they no longer operate within the familiar traditional framework, and hot electron or even quantum mechanical models are required. The need for accurate and efficient models suitable for computer aided design has increased with the demand for a wider range of integrated devices for operation at microwave, millimetre and optical frequencies. The apparent complexity of equivalent circuit and physics-based models distinguishes high frequency devices from their low frequency counterparts . . Over the past twenty years a wide range of modelling techniques have emerged suitable for describing the operation of compound semiconductor devices. This book brings together for the first time the most popular techniques in everyday use by engineers and scientists. The book specifically addresses the requirements and techniques suitable for modelling GaAs, InP. ternary and quaternary semiconductor devices found in modern technology.
Download or read book Modeling and Characterization of RF and Microwave Power FETs written by Peter Aaen and published by Cambridge University Press. This book was released on 2007-06-25 with total page 375 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a comprehensive exposition of FET modeling, and is a must-have resource for seasoned professionals and new graduates in the RF and microwave power amplifier design and modeling community. In it, you will find descriptions of characterization and measurement techniques, analysis methods, and the simulator implementation, model verification and validation procedures that are needed to produce a transistor model that can be used with confidence by the circuit designer. Written by semiconductor industry professionals with many years' device modeling experience in LDMOS and III-V technologies, this was the first book to address the modeling requirements specific to high-power RF transistors. A technology-independent approach is described, addressing thermal effects, scaling issues, nonlinear modeling, and in-package matching networks. These are illustrated using the current market-leading high-power RF technology, LDMOS, as well as with III-V power devices.
Download or read book Large signal Modeling of GaN HEMTs for Linear Power Amplifier Design written by Endalkachew Shewarega Mengistu and published by kassel university press GmbH. This book was released on 2008 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characterisation and Simulation of the Temperature Dependence of the Current Voltage Characteristics of Gallium Arsenide Mesfets written by Brian Phillip Stothard and published by . This book was released on 1995 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt: A non-linear dc MESFET model which accurately incorporates the effect of temperature would be a very useful design tool. To consider this a number of measurements were considered important these included measuring the IV characteristics under static, pulsed and frequency dependent conditions. A large number of devices have been considered from low to high power and with different gate geometries. The device self-heating is also an important consideration and this has been addressed by performing pulsed dc measurements and by measuring the device surface temperature as a function of bias with nematic liquid crystals. A new non-linear thermal dc model has been developed which shows better accuracy than previously published models, over a wide temperature and bias range and for different devices of varying gate-widths and finger designs. This approach couples together the bias and temperature dependencies of the transconductance and pinch-off voltage parameters, which is important for low temperature or low bias conditions. This enables the temperature dependence to be easily incorporated into the model and also simplifies the parameter extraction Process.
Download or read book Naval Research Reviews written by and published by . This book was released on 1999 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Compound Semiconductor Electronics written by Michael Shur and published by World Scientific. This book was released on 1996 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: In many respects, compound semiconductor technology has reached the age of maturity when applications will have been defined, yields are high enough and well established, and gallium arsenide and related compounds have carved many important niches in electronics. This book reviews the state-of-the-art of compound semiconductor electronics. It covers the microwave, millimeter wave, and submillimeter wave devices, monolithic microwave and digital integrated circuits made from compound semiconductors and emerging wide band semiconductor materials. The book is written by leading experts in compound semiconductor electronics from industry and academia and strikes the balance between practical applications, record-breaking results, and design and modeling tools specific for compound semiconductor technology. Engineers, scientists, and graduate students working in solid state electronics and especially in the area of compound semiconductor electronics will find this book very useful. It could also be used as a text or a supplementary text for graduate courses in this field.
Download or read book Microelectronics Failure Analysis written by and published by ASM International. This book was released on 2004-01-01 with total page 813 pages. Available in PDF, EPUB and Kindle. Book excerpt: For newcomers cast into the waters to sink or swim as well as seasoned professionals who want authoritative guidance desk-side, this hefty volume updates the previous (1999) edition. It contains the work of expert contributors who rallied to the job in response to a committee's call for help (the committee was assigned to the update by the Electron
Download or read book III V Microelectronics written by J.P. Nougier and published by Elsevier. This book was released on 2014-05-27 with total page 523 pages. Available in PDF, EPUB and Kindle. Book excerpt: As is well known, Silicon widely dominates the market of semiconductor devices and circuits, and in particular is well suited for Ultra Large Scale Integration processes. However, a number of III-V compound semiconductor devices and circuits have recently been built, and the contributions in this volume are devoted to those types of materials, which offer a number of interesting properties. Taking into account the great variety of problems encountered and of their mutual correlations when fabricating a circuit or even a device, most of the aspects of III-V microelectronics, from fundamental physics to modelling and technology, from materials to devices and circuits are reviewed. Containing contributions from European researchers of international repute this volume is the definitive reference source for anyone interested in the latest advances and results of current experimental research in III-V microelectronics.
Download or read book Proceedings written by and published by . This book was released on 1997 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Microelectronic Failure Analysis Desk Reference written by and published by ASM International. This book was released on 2001-01-01 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: Developed by the Electronic Device Failure Analysis Society (EDFAS) Publications Committee.
Download or read book GaAs MESFET Circuit Design written by Robert Soares and published by Artech House Publishers. This book was released on 1988 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Efficiency Enhancement of Linear GaN RF power Amplifiers Using the Doherty Technique written by and published by kassel university press GmbH. This book was released on with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investment in Research and Development written by United States. Congress. Joint Economic Committee and published by . This book was released on 1988 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:
