TIMA laboratory


Raoul VELAZCO senior member IEEE

Award: Raoul VELAZCO senior member IEEE
IEEE Senior member grade is offered in recognition of professional standing and significant performance.


Best Presentation and Paper Award at JNRSE'2017 (Lyon, FRANCE)

Award: Best Presentation and Paper Award at JNRSE 2017 (7èmes Journées Nationales sur la Récupération et le Stockage d'Energie)

Title: "Modeling and operating temperature tuning of a thermally activated piezoelectric generator"

Authors: Adrian RENDON-HERNANDEZ and Skandar BASROUR

Abstract: This paper deals with the finite element model of a thermally activated piezoelectric generator. Furthermore, it presents an experimentally validated temperature tuning technique based on the gap distance of the triggering system. The working principle of proposed generator relies on the multi step thermal-to-mechanical-to-electrical energy conversion, overcoming inconveniences related to fast temporal temperatura variations and large temperature differences for efficient operating of classical direct thermal energy conversion. Performance optimization can be done in the form of temperature span tuning by changing the gap distance. By increasing this parameter, it is possible to maximize the Energy up to 10 times. Experimental data suggests that output energy up to 67 μW is possible when optimal gap distance is set. This corresponds to a power density of 103 μWcm-3

May 9-10, 2017


Runner-up Best Paper Award in SBCCI'2016 (Belo Horizonte, BRAZIL)

Award: Runner-up Best Paper Award in lnternational Symposium on Integrated Circuits and Systems Design (SBCCI) 2016

Project: New Asynchronous Protocols for Enhancing Area and Throughput in Bundled-Data Pipelines


Abstract: This paper presents two new area-reduced controllers for bundled-data asynchronous pipelines in which the stages have long critical paths. The proposed protocols allow to reduce the number of required delay elements by using the falling edge of the asynchronous request to indicate data validity. For critical path lengths of 25 gates, the first presented scheme decreases the controller area by 48% and slightly increases the maximum throughput (2%) in comparison to a standard micropipeline implementation. The other more-concurrent scheme proposition leads to a 25% area reduction and a 40% improvement of the maximum pipeline throughput.

August 29 - September 3, 2016


Best Doctoral Thesis Award of TTTC IEEE Computer Society: 1st in Europe, 2nd World Wide

Award: Best Doctoral Thesis Award of TTTC IEEE Computer Society: 1st in Europe, 2nd World Wide
Title: Memory Repair Architectures for High Defect Densities
Author: Panagiota Papavramidou
Advisor: Michael Nicolaidis


Best Paper Award, student 2nd place at NEWCAS'2017 (Strasbourg, FRANCE)

Award: Best Paper Award, student 2nd place at NEWCAS 2017

Title: On-the-fly and sub-gate-delay resolution TDC based on self-timed ring: A proof of concept.


Abstract: A new fully digital high resolution time-to-digital converter (TDC) based on a self-timed ring oscillator (STR) is presented. The proposed TDC can virtually achieve as fine as desired time resolution by simply increasing its number of stages thanks to the STR unique features. Moreover, the proposed technique allows on-the-fly time measurement on fast non-periodic signals. The TDC has been implemented using 28 nm FDSOI technology to provide a proof of concept of the proposed method. Simulation results point out

June 25- 28, 2017


Best Paper Award at the SNUG (Synopsys User Group) Conference

Award: Titre : Conclusive Formal Verification of Clock Domain Crossings using SpyGlass-CDC

Auteurs : Mejid Kebaili (STMicroelectronics) & Guillaume Plassan (Synopsys) (deux doctorants de TIMA/AMFORS en thèse CIFRE:
Guillaume Plassan: CIFRE avec Synopsys
Mejid Kebaili:CIFRE avec STMicroelectronics
Récompense : “Best Paper Award” from the Technical Committee

Abstract :
In modern designs, the correct propagation of data through clock domains is ensured by implementing specific synchronizer protocols.
Then, to guarantee the absence of metastability, data loss or incoherence, the functional correctness of each CDC (Clock Domain Crossing) must be verified by using formal techniques.
However, flat verification of large designs often leads to an inconclusive status (neither proved nor failed) with limited debug capabilities.
In order to ease the formal analysis, an enhanced solution, called the Reactive flow, has been developed in the context of ST / Synopsys collaboration.
It consists of automatically abstracting irrelevant parts of the design in order to provide at least a local cause for a fail.
Also, our flow generates potential missing constraints to setup the design and to guide the formal analysis.
This methodology has been performed on large CPU 64 bits Sub-Systems with positive results.

le 28/06/2016 au World Trade Center de Grenoble


Best Paper Award at NANOARCH 2016 symposium

Award: Title: Multi-contex Non-volatile Content Adressable Memory using Magnetic Tunnel Junctions

Authors: E. Deng (TIMA, AMfoRS), L. Anghel (TIMA, AMfoRS), G. Prenat (TIMA, RMS), W. Zhao (TIMA, AMfoRS)

Award: 2016 Best Paper Award at the 12th IEEE/ACM International Symposium on Nanoscale Architectures, July 18-20, 2016, Beijing, China

July 18-20, 2016


Best Paper Award at the Rapido workshop (joint work with Kalray)

Award: Titre : Virtual prototyping of floating point units

Auteurs : Sarrazin G. (TIMA - SLS), Brunie N. (Kalray), Pétrot F. (TIMA - SLS)

Récompense: 2016 : Best paper award at the Rapido workshop (joint work with Kalray), circuit presented at ISSCC implementing our patented asynchronous serdes for 3D-Chips

18-20 janvier 2016


Best Paper Award Nominee at SMACD'2017 (Taormina, ITALY)

Award: Best Paper Award Nominee in lnternational Conference on Synthesis, Modeling, Analysis, and Simulation Methods and Applications to Circuit Design (SMACD) 2017

Project: Importance of IR Drops on the Modeling of Laser-Induced Transient Faults


Abstract: Laser fault injection attacks induce transient faults by locally generating transient currents capable of temporarily flip the outputs of several gates. Many models used to simulate transient faults induced by laser consider several elements to better represent the effects of the laser on ICs. However, a laser-induced current between VDD and GND, which provokes significant IR drops, has been neglected. This paper highlights the importance of the induced IR drops on the modeling of laserinduced transient faults by using IR drop CAD tools. It also shows that laser-induced IR drops can be sufficiently strong to produce alone transient faults. As a result, the number of faults on a case-study circuit is accentuated whether IR drop effects are taken into account.

June 12-15, 2017