Tuesday, January 31, 2017

#Memristors, the fourth fundamental circuit element? https://t.co/V03Zp7Oaxw #cad #feedly #papers

from Twitter https://twitter.com/wladek60

January 31, 2017 at 02:53PM

[chapter] Near-Threshold Digital Circuits for Nearly-Minimum Energy Processing

Near-Threshold Digital Circuits for Nearly-Minimum Energy Processing
Massimo Alioto
Department of Electrical & Computer Engineering, National University of Singapore
in Enabling the Internet of Things; pp 95-148 
DOI: 10.1007/978-3-319-51482-6_4
This chapter addresses the challenges and the opportunities to perform computation with nearly-minimum energy consumption through the adoption of logic circuits operating at near-threshold voltages. Simple models are provided to gain an insight into the fundamental design tradeoffs. A wide set of design techniques is presented to preserve the nearly-minimum energy feature in spite of the fundamental challenges in terms of performance, leakage and variations. Emphasis is given on debunking the incorrect assumptions that stem from traditional low-power common wisdom at above-threshold voltages. The traditional EKV model is very useful for quick estimates, but it oversimplifies the IV characteristics that is observed in actual nanometer CMOS technologies [read more...]

[paper] Electronically tunable MOSFET-based resistor

Electronically tunable MOSFET-based resistor used in a variable gain amplifier or filter
W. L. Tan, C. H. Chang and L. Siek
Nanyang Technological University; Singapore 
2016 International Symposium on Integrated Circuits (ISIC), Singapore, 2016, pp. 1-4.
doi: 10.1109/ISICIR.2016.7829715
Abstract: We present a new design of an electronically tunable linear MOS resistor circuit that operates in the subthreshold saturation region, supported with mathematical derivations and simulation results using CSM0.13µm technology. For a given potential difference across the MOS resistor, its gate voltage will be automatically biased through feedback to provide the correct amount of current based on the desired resistance set through the bias current. Equating the output current of the OTA with the subthreshold equation of the EKV model. In comparison with an existing design, the proposed design offers equal tunabilty with 36 less transistors for unidirectional current and 28 less transistors with one more bias current transistor for bidirectional current. A bias current ranging between 10nA to 100nA offers a tunable linear resistance between 20MΩ to 140MΩ [read more...]

Monday, January 30, 2017

OCS: Octave Circuit Simulator

OCS was developed during the CoMSON (Coupled Multiscale Simulation and Optimization) project which involved several universities but also several industrial partners. Each of the industrial partners at the time was using its own circuit simulation software and each software had different file formats for circuit netlists. Given the purposes of the project and the composition of the consortium the main design objectives for OCS where
  • provide a format for "element evaluators" independent of time-stepping algorithms
  • provide a "hierarchical" data structure where elements could be composed themselves of lumped-element networks
  • allow coupling of lumped-element networks (0D) and 1D/2D/3D device models
  • use an intermediate/interchange file format so that none of the formats in use by the industrial partners would be favoured over the others
  • be written in an interpreted language for quick prototyping and easy maintenance
  • be Free Software

[Course] Advanced CMOS/FinFET Fabrication

February 6, 2017; Portland, OR, USA

Semiconductor and integrated circuit developments continue to proceed at an incredible pace. For example, today’s microprocessor chips have one thousand times the processing power of those a decade ago. These challenges have been accomplished because of the integrated circuit industry’s ability to track something known as Moore’s Law. Moore’s Law states that an integrated circuit’s processing power will double every two years. This has been accomplished by making devices smaller and smaller. The question looming in everyone’s mind is “How far into the future can this continue?” Advanced CMOS/FinFET Fabrication is a 1-day course that offers detailed instruction on the processing used in a modern integrated circuit, and the processing technologies required to make them. We place special emphasis on current issues related to manufacturing the next generation devices. This course is a must for every manager, engineer and technician working in the semiconductor industry, using semiconductor components or supplying tools to the industry.

Register for this Course

Friday, January 27, 2017

SimCAS symbolic analog simulator

Simcas is a simple and very flexible analog simulator. SimCAS uses symbolic equations to define components and solves the net system by using a "Computer Algebra System" algorithm [read more at: SimCAS Web Site]

Related papers:

[1] K. Singhal and J. Vlach, "Symbolic analysis of analog and digital circuits," in IEEE Transactions on Circuits and Systems, vol. 24, no. 11, pp. 598-609, Nov 1977. doi: 10.1109/TCS.1977.1084282
[2] G. M. Wierzba, A. Srivastava, V. Joshi, K. V. Noren and J. A. Svoboda, "Sspice-a symbolic SPICE program for linear active circuits," Proceedings of the 32nd Midwest Symposium on Circuits and Systems,, Champaign, IL, 1989, pp. 1197-1201 vol.2. doi: 10.1109/MWSCAS.1989.102070
[3] G. G. E. Gielen, H. C. C. Walscharts and W. M. C. Sansen, "ISAAC: a symbolic simulator for analog integrated circuits," in IEEE Journal of Solid-State Circuits, vol. 24, no. 6, pp. 1587-1597, Dec 1989. doi: 10.1109/4.44994
[4] Rob A. Rutenbar; Georges G. E. Gielen; Brian A. Antao, Interactive AC Modeling and Characterization of Analog Circuits via Symbolic Analysis; Computer-Aided Design of Analog Integrated Circuits and Systems; Year: 2002; Pages: 287 - 312, DOI: 10.1109/9780470544310.ch23
[5] G. Fontana; F. Grasso; A. Luchetta; S. Manetti; M. C. Piccirilli; A. Reatti; A new simulation program for analog circuits using symbolic analysis techniques; 2015 International Conference on Synthesis, Modeling, Analysis and Simulation Methods and Applications to Circuit Design (SMACD); Year: 2015; Pages: 1 - 4, DOI: 10.1109/SMACD.2015.7301682

[paper] 400 fJ Per-Cycle Frequency Reference for IoT

A 400 fJ Per-Cycle Frequency Reference for Internet of Things
Mathieu Coustans, François Krummenacher, Christian Terrier and Maher Kayal
IEL, École Polytechnique Fédérale de Lausanne, Switzerland

Abstract—This work presents an ultra-low power oscillator designed to target different contexts, such as crystal-assisted time keeping, reference oscillator to optimize the always on domain of a microcontroller or wake-up timer. This oscillator enables ultra-low power operation in 180nm CMOS technology with EKV3 compact model; the core oscillator consumes 2.5 nW at room temperature, with a temperature stability of 14 ppm/°C [-40°C - 60°C] and 0.07 %/V supply sensitivity [read more...]

Thursday, January 26, 2017

Changing Direction In Chip Design https://t.co/XV84VQnO71 #semi #feedly #papers

Andrzej Strojwas, chief technologist at PDF Solutions and professor of electrical and computer engineering at Carnegie Mellon University—and the winner of this year’s Phil Kaufman Award for distinguished contributions to EDA—sat down with Semiconductor Engineering to talk about device scaling, why the semiconductor industry will begin to fragment around new architectures and packaging, and where are the holes that need to be filled.

from Twitter https://twitter.com/wladek60

January 26, 2017 at 08:12PM

Monday, January 23, 2017

[EUROSOI ULIS] Deadline for abstract submission extended to January 29, 2017

Submit your abstract for  Conference to be held in Athens in April 2017 as soon as possible. We would like to inform you that, due to several requests, the deadline for abstract submission has been extended to January 29, 2017Please note that there will be both Oral and Poster Sessions 

Call for Papers

The organizing committee invites scientists and engineers working in the above fields to actively participate by submitting high quality papers. Original 2-page abstracts with illustrations will be accepted for review in pdf format. The accepted abstracts will be published in a Proceedings book with an ISBN. A 4-page follow-up paper delivered before will be published in IEEE Xplore Digital Library. The authors of the best papers will be invited to submit a longer version for publication in a special issue of Solid-State Electronics. A best paper award will be attributed to the best paper by the SINANO Institute. Both an Oral and a A Poster Session will be organized.

Prof. Maryline BawedinIMEP - INP Grenoble MINATEC, "The mystery of the Z2-FET 1T-DRAM memory"
Dr. Frank Schwierz, University of Ilmenau, "The Prospects of 2D Materials for Ultimately-Scaled CMOS"
Dr. Cosmin Roman, ETH Zurich, "Micro and Nano transducers for autonomous sensing applications"
Dr. Carlo Cagli,  CEA-LETI,  "Memories"
Dr. Anda Mocuta, IMEC, "Nanoscale FET"

The EUROSOI ULIS Conference Chairperson: 
Prof. Androula G. Nassiopoulou
NCSR Demokritos 
Athens, Greece 

#TCAD Simulation of #Organic #Optoelectronic #Devices https://t.co/k7iZDQjppR #papers

from Twitter https://twitter.com/wladek60

January 23, 2017 at 09:47AM

Thursday, January 19, 2017

2016 Phil Kaufman Award Recipient: Dr. Andrzej Strojwas

Kaufman Award Dinner: Why you should Attend

IEEE’s CEDA and the ESD Alliance – with help from their friends at PDF Solutions, Cadence, Mentor, Synopsys and ACM SIGDA – will host a dinner on Thursday, January 26th, in honor of the 2016 Phil Kaufman Award recipient: Dr. Andrzej Strojwas, Keithley Professor of ECE at Carnegie Mellon and long-time CTO at PDF Solutions.

This year’s Kaufman Award Dinner promises to be an inspiring evening, one that will help you remember why you went to work here in the first place [read more...]

If you want to attend, you can register here.

Tuesday, January 17, 2017

[mos-ak] [2nd Announcement and Call for Papers] Spring MOS-AK Workshop at DATE Conference in Lausanne, March 31, 2017

 Spring MOS-AK Workshop  
   at DATE Conference in Lausanne, March 31, 2017
     2nd Announcement and Call for Papers   
 Together with the MOS-AK workshop chair, Dr. Jean-Michel Sallese, EPFL and International MOS-AK Board of R&D Advisers: Larry Nagel, Omega Enterprises Consulting (USA), Andrei Vladimirescu, UCB (USA); ISEP (FR) as well as all the Extended MOS-AK TPC Committee, we have pleasure to invite to the Spring MOS-AK Workshop which will be held during DATE Conference on March 31, 2017 in Lausanne (CH). Planned MOS-AK workshop is organized with aims to strengthen a network and discussion forum among experts in the field, enhance open platform for information exchange related to compact/SPICE modeling and Verilog-A standardization, bring people in the compact modeling field together, as well as obtain feedback from technology developers, circuit designers, and CAD/EDA tool developers and vendors. 

Important Dates:
  • Preannouncement - Dec. 2016
  • Call for Papers - Jan. 2017
  • Final Workshop Program - Feb. 2017
  • MOS-AK Workshop - March 31, 2017
Swisstech Convention Centre Quartier Nord de l'EPFL Route Louis-Favre 2 CH-1024 Ecublens (CH)
Topics to be covered include the following among other related to the compact/SPICE modeling :
  • Compact Modeling (CM) of the electron devices
  • Advances in semiconductor technologies and processing
  • Verilog-A language for CM standardization
  • New CM techniques and extraction software
  • Open Source TCAD/EDA modeling and simulation
  • CM of passive, active, sensors and actuators
  • Emerging Devices, TFT, CMOS and SOI-based memory cells
  • Microwave, RF device modeling, high voltage device modeling
  • Nanoscale CMOS devices and circuits
  • Technology R&D, DFY, DFT and reliability/ageing IC Designs
  • Foundry/Fabless Interface Strategies
Online MOS-AK Abstract Submission:
Prospective authors should submit abstract online 
(any related inquiries can be sent to abstrscts@mos-ak.org)

Online Workshop Registration (to be open Feb.2017):
(any related inquiries can be sent to register@mos-ak.org)

Postworkshop Publications:
Selected best MOS-AK technical presentation will be recommended for further publication
in a special issue of the International Journal of High Speed Electronics and Systems

Extended MOS-AK Committee


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Monday, January 16, 2017

[mos-ak] [press note] 9th International MOS-AK Workshop at UC Berkeley, Dec.7, 2016

Arbeitskreis Modellierung von Systemen und Parameterextraktion 
Modeling of Systems and Parameter Extraction Working Group
9th International MOS-AK Workshop
(co-located with the CMC Meeting and IEDM Conference)
December 7, 2016 Berkeley

The MOS-AK Association, a global compact/SPICE modeling and Verilog-A standardization forum, held its annual Q4 event on December 7, 2016 UC Berkeley as its 9th consecutive International MOS-AK Workshop. The event was coordinated by Larry Nagel, OEC (USA) and Andrei Vladimirescu, UCB (USA); ISEP (FR) representing the International MOS-AK Board of R&D Advisers. The workshop was hosted by Prof. Jaijeet Roychowdhury of EECS at the University of California at Berkeley and co-sponsored by Keysight Technologies and NEEDS of nanoHUB.org.

The workshop provided presentations from the leading developers of compact device models. The audience spanned the full range of the semiconductor industry, including representatives from foundries, model characterization services firms, academic researchers investigating emerging device technologies, and design companies. The amount and breadth of technical information discussed was vast -- here are but a few highlights by ChipGuy:

These were but a few of the technical highlights and achievements discussed at the workshop which are available online:

The MOS-AK Modeling Working Group has various deliverables and initiatives, including: a book entitled "Open Source CAD Tools for Compact Modeling" <www.mos-ak.org/books>; an open Verilog-A directory with compact models <http://www.mos-ak.org/open_dir/>; and supporting FOSS TCAD/CAD software.

The MOS-AK Association plans to continue its standardization efforts by organizing additional compact modeling meetings, workshops and courses in Europe, USA, India and China throughout 2017 year, including:
If you are involved in developing or supporting device models for circuit designers, we would encourage you to become an active participant in the MOS-AK community.

About MOS-AK Association:
MOS-AK, an international compact modeling association primarily focused in Europe, to enable international compact modeling R&D exchange in the North/Latin Americas, EMEA and Asia/Pacific Regions. The MOS-AK Modeling Working Group plays a central role in developing a common language among foundries, CAD vendors, IC designers and model developers by contributing and promoting different elements of compact/SPICE modeling and its Verilog-A standardization and related CAD/EDA tools for the compact models development, validation/implementation and distribution.

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[paper] Radiation-Induced Fault Simulation of SOI/SOS CMOS LSI’s Using Universal Rad-SPICE MOSFET Model

Radiation-Induced Fault Simulation of SOI/SOS CMOS LSI’s 
Using Universal Rad-SPICE MOSFET Model
Konstantin O. Petrosyants, Lev M. Sambursky, Igor A. Kharitonov, Boris G. Lvov
J Electron Test (2017)

Abstract: The methodology of modeling and simulation of environmentally induced faults in radiation hardened SOI/SOS CMOS IC’s is presented. It is realized at three levels: CMOS devices – typical analog or digital circuit fragments – complete IC’s. For this purpose, a universal compact SOI/SOS MOSFET model for SPICE simulation software with account for TID, dose rate and single event effects is developed. The model parameters extraction procedure is described in great depth taking into consideration radiation effects and peculiarities of novel radiation-hardened (RH) SOI/SOS MOS structures. Examples of radiation-induced fault simulation in analog and digital SOI/SOS CMOS LSI’s are presented for different types of radiation influence. The simulation results show the difference with experimental data not larger than 10–20% for all types of radiation.
The electrical schematics of SOS CMOS opamp and 4-bit counter are presented; two variants of either macromodel were used for body-tied partially-depleted transistors: a) core EKV-SOI/ BSIMSOI model; b) EKV-RAD/ BSIMSOI-RAD macromodel. [read more...]

Tuesday, January 10, 2017

ICMTS 2017 in Grenoble (F)

March 27-30, 2017, MINATEC, Grenoble (F)
  • Monday 27th March
    • Tutorials
    • Welcome Reception
  • Tuesday 28th March
    • SESSION 1: Novel Test Structure
    • SESSION 2: Novel Materials
    • SESSION 3: Variability
    • SESSION Exhibitions
  • Wednesday 29th March
    • SESSION 4: Device Modeling
    • SESSION 5: RF and HV
    • SESSION 6: Device Testing
    • SESSION 7: Sensor Test Structures
  • Thursday 30th March
    • SESSION 8: Low Frequency Noise
    • SESSION 9: Advanced Test Methods

[paper] Modeling, simulation and implementation of circuit elements in an open-source tool set on the FPAA

Modeling, simulation and implementation of circuit elements in an open-source tool set on the FPAA
Aishwarya Natarajan and Jennifer Hasler
Georgia Institute of Technology Atlanta USA
Analog Integr Circ Sig Process (2017), pp 1–12

ABSTRACT: An open-source simulator to design and implement circuits and systems, replicating the results from the Field Programmable Analog Array (FPAA) is presented here. The fundamental components like the transistors, amplifiers and floating gate devices have been modeled based on the EKV model with minimal parameters. Systems including continuous-time filters and the analog front-end of a speech processing system have been built from these basic components and the simulation results and the data from the FPAA are shown. The simulated results are in close agreement to the experimental measurements obtained from the same circuits compiled on the FPAA fabricated in a 350 nm process [read more...]

Tuesday, January 3, 2017

On Layout Tools and others

A while ago SolvEx Group has posted a blog note on the Layout Tools, including the open source ones, too. There are also a few questions which are worth to review again:
  1. How is Layout different from Placement and Route?
  2. What is the difference between Synopsys Astro and Cadence Virtuoso-do they offer layout or are just placement and routing tools? (Comparing them with Magic and LASI)!
  3. What is the intermediate map/snapshot/diagram - which we can use and create a complete chip out of? For example after seeing the Chip and reverse engineering the same- what is that something which I can use to create my own chip in the foundry? Reference - Chinese Mobile chips. They do the same-as they bypass the flow for design entry/verification/simulation/floor planning etc and release the chip within a few hrs of seeing the original chip(say famous case of duplicating iPhone/Nokia in the Chinese markets)
  4. Are Stick Diagrams passed to the Foundry or else what is the base unit that is given to Foundry as an input to be manufactured as a chip.
  5. Giving below a collection all possibly available Layout Tools (Categorized as Open Source, Cheap, Expensive)
Open source software Description Web site
wol Wol is a graphical environment for IC mask layout http://www.cs.berkeley.edu/~lazzaro/chipmunk/describe/wol.html
toped Micron based layout editor with extensive scripting capabilities. Under active development and part of Fedora Electronic Lab. http://www.toped.org.uk
microwind3 Lambda based layout editor especially adapted for interactive design with Spice. This used to be completely free, but now only a Lite version is. http://www.microwind.org
magic Lambda based layout editor with good options for writing CIF and/or GDS files. Supports scripting. Large user base. Part of
Fedora Electronic Lab. Used for extraction and CIF/GDS creation by the pharosc libraries
lasi LASI stands for LAyout Software for Individuals. It is designed to run on Windows, though it also runs on Linux under Crossover Office.
Actively used software with frequent updates.
kic Part of open source packages released by Whiteley Research. http://wrcad.com/freestuff.html
graal Lambda based layout editor allowing conversion to CIF and GDS with appropriate technology files. Dreal is the companion software to view CIF and GDS. Part of a tool set from Alliance which is probably the best open-source software for IC design. Comes with own standard cell library. Part of
Fedora Electronic Lab. The pharosc standard cells are drawn with graal.
electric Comprehensive set of software programs designed around the concept of silicon compilation. Version 6 crashed a lot, and stored all design data in a single file which exposed one to the risk of file corruption and loss of all data (I speak from experience).
New version written in Java. Extensive documentation.
dreal Simple layout editor which uses CIF or GDS as its native format. Companion software is Graal. http://www-asim.lip6.fr/recherche/alliance
Cheap software
xic Whiteley Research Inc. Layout editor with linked Spice simulator. List price is $1195. http://www.wrcad.com/xic.html
slam-edit Stabie-Soft Inc. Unix/Linux based layout editor. It seems a licence cannot be purchsed, only leased for one year periods (bad if the company folds). List price on web site is $2,000 per year. http://www.stabie-soft.com/sledit.html
ledit Tanner Research Inc. Windows only layout editor popular with mixed signal designers. Ledit sed to cost $1,000, but this price could not be verified (which is surprising since low price is a key selling point of the software). http://www.tanner.com/EDA/product/Tools_PhysicalLayout.html
layedpro Mycad Inc. Windows only layout editor designed in Korea but supported for English language users from California. No new product since 2005 on US site, but Korean site seems active. No price could be confirmed. http://www.mycad.com/02pro/01.html
layed Catena Software GmbH. Demo versions for Linux and Windows can be downloaded. List price of the basic editor might be €1,585 (could not be recently verified). http://www.catena-ffo.de/laytools.htm
iced IC Editors Inc. Windows only editor that used to cost $2,750. Now it is free but with a restrictive licence. Work is on-going to open source it which might make it available under Linux (although the Windows drawing primitives would need to be replaced with GTK). http://www.iceditors.com
Expensive software
virtuoso Cadence Design Systems, Inc. The market leader. The price might be $40,000 to lease for one year. http://www.cadence.com/products/custom_ic/veditor/index.aspx
max Micro Magic Inc. Looks like a commercial version of Magic. Price is $30,000 for a one year licence. Despite the fancy price tag, something was freely downloadable from the web in the 2004 timeframe. http://www.micromagic.com
laker Silicon Canvas Inc. Linux and Unix based editor. Top of the line laker-ddl is $70,000 for a one year licence. Regular Laker 3 is $35,000 for a one year licence. http://www.sicanvas.com
icstation Mentor Graphics Corp. No public pricing information could be found. http://www.mentor.com/cicd/icstation.html