Publicado em: 31/05/2013

Prof. Sergio Bampi palestrou na INTEL e na Universidade de Portland – EUA

O prof. Sergio Bampi ministrou palestra no Centro de Pesquisa “Circuits Design Laboratory” da empresa INTEL, na cidade de Hillsboro, Estados Unidos, no dia 29 de maio, sobre o trabalho desenvolvido no PPG de Computação do INF-UFRGS: “Energy-speed Exploration in Near-Threshold CMOS Circuits for Very Wide Voltage-Frequency Scaling”. O pesquisador demonstra o controle do controle do consumo de energia por um fator de até 100 vezes, com a operação de processadores e filtros digitais em regime de tensões abaixo de 300 mV, explorando um vasto espectro de desempenho dos circuitos integrados.”. 

E, dia 30 de maio, o professor apresentou palestra na Universidade de Portland State (PSU), na cidade de Portland-EUA, sobre ” Fin Field-Effect Transistors on Silicon-on-Insulators:  16nm Nano-CMOS and the future 2-D scaling”, a convite do grupo de Design & CAD do Depto de Engenharia da Computação da PSU

Veja  anúncio circulado no Centro de Pesquisa da INTEL (EUA):

With the increasing use of mobile devices with various sensing  technologies and continuously connected to online social networks,  we leave behind an increasing amount of digital traces about our  daily activities. We are starting to realize that systems that take  advantage of this ever growing data supply have the potential to  transform the way we live our lives. In this talk, I will focus on  the projects carried out in the Data Science Laboratory of the ISI  Foundation, which try to introduce a novel, data-driven approach in  the investigation of various aspects of human behavior. At ISI  Foundation, I was involved in the SocioPatterns project (www.sociopatterns.org), an interdisciplinary research  collaboration in which we have developed the SocioPatterns sensing  platform to collect datasets on face-to-face contact events between  individuals in a variety of contexts, such as conferences, museums,  schools and hospitals. Such data is being investigated with the aim  of uncovering fundamental patterns in social dynamics and  coordinated human activity, focusing on research in the areas of  human mobility, opportunistic networks and computational  epidemiology. By using established methods from the Network Science  field, I will show how to describe some properties of the gathered  datasets, in order to reveal interesting similarities and  differences of human interaction patterns across contexts

Abstract/Resump
To design highly energy-efficient CMOS circuits a large energy-speed design exploration is necessary. This talk addresses the experiments on near-threshold operation of CMOS that exploit a very wide voltage-frequency scaling.  We show it is possible to achieve 8X higher energy-efficiency with such wide range, from nominal voltages down to the lower boundary of near-VT operation. The work developed a CMOS cell-library in a 65nm commercial PDK, and it targets near-VT operation, mitigating the variability effects without compromising the design in terms of area and energy in strong inversion. The set of  digital cells developed has a maximum of 2-stacked transistors, it  includes master-slave registers and the results show the reasons for choosing a limited library. Synthesis results are discussed for medium complexity designs, which include a 25kgates notch filter, a 20kgates 8051 compatible core, and 4-combinational/4-sequential ISCAS benchmark circuits. In this work the maximum frequency attainable at each supply for a wide variation of voltage is studied from 150mV up to near-VT, and up to nominal voltage (1.2V). The sub-VT operation is shown to hold the minimum energy-point at roughly 0.29V, which represents a 2X energy-savings  compared to the near-VT regime. Although energy-efficiency peaks in sub-VT for the circuits studied, we also show that in this ultra-low supply the circuit timing and power suffer from substantially increased variability impact and a 30x performance drawback, with respect to near-VT operation.

Biography:
Prof. Sergio Bampi is a full professor at the Microelectronics Group at Federal  University at Porto Alegre since 1986, where he leads a CMOS design group for both digital and analog mixed-signal circuits . He received the B.Sc in Electronics and the B.Sc. in Physics from the Federal Univ. of  Rio Grande do Sul (UFRGS, 1979), and the M.Sc. and Ph.D. degrees in electrical engineering from Stanford University in 1986.  He served as Distinguished Lecturer (2009-10) of IEEE Circuits and Systems Society, worked as the Technical Director of the Microelectronics Center CEITEC in Brazil, now a public company. Sergio Bampi is project leader in the Microelectronics and Computer Science Ph.D. Programs, and his research interests are in the areas of dedicated  complex architectures and ASICs for image and video processing,  CMOS circuit design and modeling, nano-CMOS devices, mixed signal and RF CMOS design, low power digital design. He has co-authored more than 250 papers in these fields and in MOS devices, circuits, technology and CAD. He served on the TPC of IEEE conferences like ICCAD, VLSI-SoC, ICM, LASCAS and DATE. Sergio Bampi was the President of the Research Funding agency FAPERGS in Brazil, President of the Brazilian Microelectronics Society (2002-2004), and Coordinator of the Graduate Program on Microelectronics at Federal University UFRGS (2003-2007). He is a member of IEEE CAS and SSC Societies.

 Wednesday, May 29, 2013, 03:00 PM US Pacific Time