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Mike Brinson - One of the best experts on this subject based on the ideXlab platform.
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Chapter 4: Schematic entry and circuit simulation with Qucs -- Chapter 5: Qucs modeling and simulation of analog/RF Devices and circuits
2019Co-Authors: Mike BrinsonAbstract:- Qucs-0.0.18: Structure and basic modelling features - Qucs-0.0.19: Introducing the next generation Qucs simulation and modelling tools - Qucs circuit simulation and Device modelling: Simulation, subcircuits, post-simulation data processing, algebraic equation-defined components and embedded design routines - Compact Device modelling: 1. Equation-Defined Device models (EDD), Radio Frequency and Equation-Defined Models (FEDD) - Compact Device modelling: 2. Analogue Device Model Synthesis (ADMS) of Verilog-A behavioural and lower level Device and circuit models; Qucs ADMS/Verilog-A “turn-key” tools - Compact Device modelling: 3. Expanded Compact Device modelling capabilities with the Berkeley Model and Algorithm Prototyping Platform (MAPP) - Qucs development: A unified GPL Compact Device modelling and simulation platform
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Chapter 6: Qucs modelling and simulation of analog/RF Devices and circuits
2019Co-Authors: Mike BrinsonAbstract:Trends in Compact Device modeling and analog circuit simulation point towards a growing interest among the modeling community in the standardization of Verilog-A as an equation based modeling language for Compact semiconductor Device model and circuit macromodel development. . This chapter introduces the principles of Compact Device modeling with equation-defined Devices and VerilogA models. For completeness circuit macromodel principles and construction are also included. It also describes the use of the different types of equation based models in analog and RF circuit simulation. Throughout the text the properties of a range of analog and RF circuits with different levels of complexity are introduced and their performance investigated with the “Quite universal circuit simulator” (Qucs) and its related software package QucsStudio. All the Device and circuit modeling techniques introduced in this chapter form part of the standard features implemented in Qucs and QucsStudio.
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Modeling of GaN HEMTs With Open Source Qucs-S Circuit Simulation and Compact Device Modeling Technology
2016Co-Authors: Mike Brinson, Vadim KuznetsovAbstract:Qucs-0.0.19-S-RC6 Simulation and Compact Device Modelling Tools Introduction to the Qucs GPL Verilog-A Module Synthesizer Qucs modelling of the ”Efficient Power Corporation (EPC)” GaN EPC2001 Power Transistor Qucs Verilog-A Modeling of the ”MIT Virtual Source GaN-RF HEMT Compact Device Model 1.0.0”: Problems Simulating with ADMS; Workarounds and Typical Simulation Data Qucs-0.0.19-S-RC6 XSPICE Code Modeling package Qucs-0.0.19-S-RC6/Ngspice/Xyce Circuit Analysis and Compact Device Parameter Extraction from Manufacturers Data or Measurements Controlled by Octave Script Files Summary
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Qucs: an introduction to the new simulation and Compact Device modelling features implemented in release 0.0.19/0.0.19Src2 of the popular GPL circuit simulator.
2015Co-Authors: Mike Brinson, Richard Crozier, Clemens Novak, Bastien Roucaries, Frans Schreuder, Guilherme B. TorriAbstract:Following the release of Qucs-0.0.18 in August 2014 the Qucs Development Team have considered in detail a number of possible directions that future versions of the software could take. Spice4qucs is one of these routes. Spice4qucs is a Qucs extension that allows Qucs schematics, including non-linear Equation-Defined Device Compact models, to be simulated with external SPICE-compatible simulation engines. Qucs-0.0.19Src2 uses ngspice and Xyce for this purpose. The recent release of Qucs-0.0.19Src2 includes the latest spice4qucs extensions and is made available as an experimental feature. All Qucs legacy simulation and modelling features remain unchanged. The spice4qucs extensions introduce in release Qucs-0.0.19Src2 include the majority of the SPICE components distributed with the ngspice and Xyce circuit simulation packages. Circuits can be simulated with Qucs qucsator, ngspice and Xyce in particular circuit investigations can be centred around SPICE, .FOUR, .NOISE, and .DISTO analysis, a SPICE compatible parametrization system employing the SPICE .PARAM statement, SPICE behavioural sources, ngnutneg scripts, and an innovative form of Qucs simulation called “Custom Simulation”. The“Custom Simulation” facility allows uses to develop ngnutmeg scripts for circuit design, Compact Device modelling, Monte-Carlo simulation (and other related circuit statistical routines) and to process simulation output data. Combinations of these new features significantly increases Qucs simulation and modelling capabilities, particularly in established areas like power/RF electronics and new emerging technologies. Qucs-0.0.19Src2 also introduces a preliminary version of a new Qucs EDD to Verilog-A Compact model synthesis tool. This feature is released as a GPL open source software tool in support of current Compact modelling research.
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a unified approach to Compact Device modelling with the open source packages qucs adms and mapp octave
2015Co-Authors: Mike BrinsonAbstract:Qucs-0.0.18: Structure and basic modelling features; Qucs-0.0.19: Introducing the next generation Qucs simulation and modelling tools; Qucs circuit simulation and Device modelling: Simulation, subcircuits, post-simulation data processing, algebraic equation-defined components and embedded design routines. Compact Device modelling: 1. Equation-Defined Device models (EDD), Radio Frequency and Equation-Defined Models (FEDD); 2. Analogue Device Model Synthesis (ADMS) of Verilog-A behavioural and lower level Device and circuit models, Qucs ADMS/Verilog-A “turn-key” tools; 3. Expanded Compact Device modelling capabilities with the Berkeley Model and Algorithm Prototyping Platform (MAPP); 4. A unified GPL Compact Device modelling and simulation platform.
Mariapilar Bernal - One of the best experts on this subject based on the ideXlab platform.
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6 micron interaction length electro optic modulation based on lithium niobate photonic crystal cavity
Optics Express, 2012Co-Authors: Huihui Lu, Jean-marc Merolla, Benattou Sadani, Gwenn Ulliac, Clement Guyot, Fadi Issam Baida, Manuel Collet, Nadege Courjal, Mariapilar BernalAbstract:We report on electro-optic modulation using a Lithium Niobate (LN) Photonic Crystal (PC) cavity structure. The Compact Device (6 μm in length) consists of a 2D photonic crystal cavity made on an Annealed Proton Exchange (APE) LN waveguide with vertical deposited electrodes. Experimental results show a tunability of 0.6 nm/V. This Compact design opens a way towards micro and nano-scale tunable photonic Devices with low driving electrical power.
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Lithium niobate photonic crystal wire cavity: Realization of a Compact electro-optically tunable filter
Applied Physics Letters, 2012Co-Authors: Fadi Issam Baida, Gwenn Ulliac, Manuel Collet, Nadege Courjal, Mariapilar BernalAbstract:We report an electro-optically tunable filter using a lithium niobate photonic crystalcavity configuration with an efficient optical guiding geometry. The Compact Device (5.5 μm × 2.8 μm) was made on a hybrid waveguide combining an annealed proton exchange waveguide and a ridge waveguide realized by focused ion beam with vertically deposited electrodes. Due to the slow light and nonlinear effect in lithium niobate photonic crystal, experimental results show an enhanced tunability of ∼0.56 nm/V. This Compact tunable photonic crystalcavity demonstration opens the path for the development of micro and nano-scale low-power driving active photonic Devices.
Jukka P. Pekola - One of the best experts on this subject based on the ideXlab platform.
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Low-temperature physics: tunnelling into the chill.
Nature, 2005Co-Authors: Jukka P. PekolaAbstract:The trend towards ever smaller electronic instruments had left refrigerators out in the cold. Now a practical, Compact Device uses quantum mechanical tunnelling to cool close to absolute zero.
Fadi Issam Baida - One of the best experts on this subject based on the ideXlab platform.
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6 micron interaction length electro optic modulation based on lithium niobate photonic crystal cavity
Optics Express, 2012Co-Authors: Huihui Lu, Jean-marc Merolla, Benattou Sadani, Gwenn Ulliac, Clement Guyot, Fadi Issam Baida, Manuel Collet, Nadege Courjal, Mariapilar BernalAbstract:We report on electro-optic modulation using a Lithium Niobate (LN) Photonic Crystal (PC) cavity structure. The Compact Device (6 μm in length) consists of a 2D photonic crystal cavity made on an Annealed Proton Exchange (APE) LN waveguide with vertical deposited electrodes. Experimental results show a tunability of 0.6 nm/V. This Compact design opens a way towards micro and nano-scale tunable photonic Devices with low driving electrical power.
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Lithium niobate photonic crystal wire cavity: Realization of a Compact electro-optically tunable filter
Applied Physics Letters, 2012Co-Authors: Fadi Issam Baida, Gwenn Ulliac, Manuel Collet, Nadege Courjal, Mariapilar BernalAbstract:We report an electro-optically tunable filter using a lithium niobate photonic crystalcavity configuration with an efficient optical guiding geometry. The Compact Device (5.5 μm × 2.8 μm) was made on a hybrid waveguide combining an annealed proton exchange waveguide and a ridge waveguide realized by focused ion beam with vertically deposited electrodes. Due to the slow light and nonlinear effect in lithium niobate photonic crystal, experimental results show an enhanced tunability of ∼0.56 nm/V. This Compact tunable photonic crystalcavity demonstration opens the path for the development of micro and nano-scale low-power driving active photonic Devices.
Robert J. Kee - One of the best experts on this subject based on the ideXlab platform.
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Methanation of carbon dioxide by hydrogen reduction using the Sabatier process in microchannel reactors
Chemical Engineering Science, 2007Co-Authors: Kriston P. Brooks, Jianli Hu, Huayang Zhu, Robert J. KeeAbstract:This paper describes the development of a microchannel-based Sabatier reactor for applications such as propellant production on Mars or space habitat air revitalization. Microchannel designs offer advantages for a Compact reactor with excellent thermal control. This paper discusses the development of a Ru - TiO2-based catalyst using powdered form and its application and testing in a microchannel reactor. The resultant catalyst and microchannel reactor demonstrates good conversion, selectivity, and longevity in a Compact Device. A chemically reacting flow model is used to assist experimental interpretation and to suggest microchannel design approaches. A kinetic rate expression for the global Sabatier reaction is developed and validated using computational models to interpret packed-bed experiments with catalysts in powder form. The resulting global reaction is then incorporated into a reactive plug-flow model that represents a microchannel reactor. © 2006 Elsevier Ltd. All rights reserved.