100 reads: Compact Device Modeling using Verilog-AMS and ADMS

Article reached 100 reads: Compact device modeling using Verilog-AMS and ADMS
Lemaitre L · Grabiński W · McAndrew C
Abstract: This paper shows how high level language as Verily-AMS can serve as support for compact modeling development of new devices. First section gives a full Verily-AMS code of a simplified bipolar transistor. Each part of the code is carefully examined and explained. Second section compared different implementations if the simplified bipolar transistor in different spice simulators. ADMS, an open-source tool developed at Motorola, performs the implementations from Verily-AMS to simulators. Third sections concludes the paper by describing by implementation of the EKV model into ADS using the compact model interface provided by Agilent.
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SourceForge Project: FreeCAD

FreeCAD is a general purpose feature-based, parametric 3D modeler for CAD, MCAD, CAx, CAE and PLM, aimed directly at mechanical engineering and product design but also fits a wider range of uses in engineering, such as architecture or other engineering specialties. It is 100% Open Source and extremely modular, allowing for very advanced extension and customization.

FreeCAD is based on OpenCasCade, a powerful geometry kernel, features an Open Inventor-compliant 3D scene representation model provided by the Coin 3D library, and a broad Python API. The interface is built with Qt. FreeCAD runs exactly the same way on Windows, Mac OSX and Linux platforms. [Download FreeCAD]

The History of ARM

Free Copy of Mobile Unleashed: The History of ARM!
by Daniel Nenni Published on 10-04-2016

As most of you know SemiWiki published a book which is a really nice history of ARM. We have received many compliments on it and we are very proud. As a thank you to all SemiWiki members I would like to offer a free electronic version of the book (PDF).

Only registered SemiWiki members can access this wiki so if you are not already a member please join as  guest: https://www.semiwiki.com/forum/register.php

A Compact Model of Drain Current for GaN HEMTs Based on 2-DEG Charge Linearization

N. Karumuri; G. Dutta; N. DasGupta; A. DasGupta, "A Compact Model of Drain Current for GaN HEMTs Based on 2-DEG Charge Linearization," in IEEE Transactions on Electron Devices , vol.PP, no.99, pp.1-7 doi: 10.1109/TED.2016.2605130

Abstract: A physics-based simple and accurate compact model of drain current for GaN-based high electron mobility transistors (HEMTs) is presented. The model is developed using analytical relations for charges in the 2-D electron gas and barrier layer. For the first time, a simple charge linearization approach has been used for GaN-based HEMTs. The access regions are accurately modeled using transistors. The model is rigorously validated over a wide range of geometries and parameters for AlGaN/GaN and AlInN/GaN HEMTs. The model also passes the DC Gummel symmetry test.

keywords: {Computational modeling; Electric potential; HEMTs; Integrated circuit modeling; MODFETs; Threshold voltage;2-D electron gas (2-DEG) charge;AlGaN/GaN;AlInN/GaN;GaN high electron mobility transistor (HEMT); Gummel symmetry; SPICE model.;charge linearization; charge-based; compact model;drain current},

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Prof. Andrzej Strojwas receives 2016 Kaufman Award

The Dictates of Fate: Andrzej Strojwas receives 2016 Kaufman Award
as of Sept. 29, 2016 by Peggy Aycinena

Dr. Andrzej J. Strojwas, professor of Electrical and Computer Engineering at Carnegie Mellon University, has been named recipient of the 2016 Phil Kaufman Award for Distinguished Contributions to Electronic System Design.

Interestingly, this is the first year that the Kaufman award is being presented for contributions to Electronic System Design, not EDA. Very appropriate given that Strojwas’ contributions are in manufacturing and not design. Prof. Stojwas is CTO at PDF Solutions, which per company CEO John Kibarian has never been an EDA company. And with Kibarian serving as co-chair of the ESD Alliance, the organization formerly known as EDAC has now fully embraced its role across the entirety of electronic system design.

Besides this nod to EDAC’s ongoing evolution, the larger implications in CEDA and the ESD Alliance naming Andrzej Strojwas as this year’s Kaufman recipient are profound: The problems associated with electronic systems are not so much in the design these days, but in the extraordinary difficulties associated with manufacturing those designs. It’s really tough, as you all know, when the structures being manufactured are smaller than the wavelengths of light used to etch them.

Which bring us back to Dr. Strojwas. He has been CTO at PDF for 20 years. Back in the last century/millennium, the problems of manufacturing below 193 nanometers could only have been guessed at, yet the company was already working on the intriguing issues of capturing post-manufacturing data and somehow packaging it up to make it useful: How does the semiconductor supply chain glean vital information about the vagaries of manufacturing a real chip and send it back up to the designers so they can learn from the reality when they put pen to paper to design the next hypothetical?

This engineering of the engineering demands scientific curiosity, steely eyed attitudes towards the realities of physics and material science, and a large dollop of business savvy to navigate between the needs and demands of the foundries and the needs and demands of the designers. Let’s allow Dr. Strojwas to take it from here. We spoke by phone this week after his award was announced. 

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