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Presentation

The research group « Electronics Microtechnology and Communication –EMC– » (code: UR13ES76) is belonging to the National School of Engineers of Sfax –ENIS-. The developed research activities are targeting the integration of circuits and microelectronic systems for diverse applications. The main proposed applications concern the medical domain, the telecommunications and mobile robotics.

Recent Publications

  • Jamel NEBHEN; Stephane MEILLERE; Mohamed MASMOUDI

    A high linear and temperature compensation ring VCO for random number generator , ASP Journal of Low Power Electronics, JOLPE, Vol. 13, N° 4, December 2017. , 2017-12-01

    [Abstract]
    Abstract
    In this paper, we propose a very simple ring VCO structure for use in a variety of applications ranging from the data encryption and mathematical simulation to the built-in-self test (BIST) of RF receivers. The proposed ring VCO has two advantages; its linearity is greatly improved compared to published VCO and the circuit is temperature compensated through a bandgap reference. The chip is fabricated in AMS 0.35 ?m CMOS technology with 2.5 V power supply. The total area is 0.02 mm2. A series of measurement results confirm the validity of the proposed circuit. Operating at 2.5 V, the output frequency is within 300 ± 2 MHz over the temperature range of -20 °C to 80 °C with power consumption of 400 ?W.


  • J. Nebhen, N. Brochard, J. Dubois, D. Ginhac

    Design of Low-Noise and Low-Power Photoreceptor for CMOS Vision Sensor , IEEE International Conference on Electronics, Circuits and Systems (ICECS), 11 December 2016, Monte Carlo, Monaco, France. , 2016-12-11

    [Abstract]
    Abstract
    This paper presents the design of a low-power and low-noise CMOS photo-transduction circuit. We propose to use a pseudo-cascode split-length transistor technique for noise reduction of photoreceptor in the subthreshold by exploiting the small size effects of CMOS transistors. Several power and noise optimizations, design requirements, and performance limitations relating to the CMOS photoreceptor are presented. This new structure with split-length transistor technique ensures low noise and low power consumption. The CMOS photoreceptor, implemented in a 130 nm standard CMOS technology with a 1.2 V supply voltage, achieves a noise floor of 0.05 µV within the frequency range from 1 Hz to 10 kHz. The current consumption of the CMOS photoreceptor is 827 nA. This paper shows the need for the design of phototransduction circuit at low voltage, low noise and how these constraints are reflected in the design of CMOS vision sensor.


  • N. Brochard, J. Nebhen, D. Ginhac

    3D-IC: New Perspectives for a Digital Pixel Sensor , 10th International Conference on Distributed Smart Cameras (ICDSC 2016), Paris, France, , 2016-09-12

    [Abstract]
    Abstract
    This paper presents the design of a low-power low-noise CMOS photo-transduction circuit. We propose to use a pseudo-cascode split-length transistor technique for noise reduction of photoreceptor in the subthreshold by exploiting the small size effects of CMOS transistors. Several power and noise optimizations, design requirements, and performance limitations relating to the CMOS photoreceptor are presented. This new structure with split-length transistor technique ensures low noise and low power consumption. The CMOS photoreceptor, implemented in a 130 nm standard CMOS technology with a 1.2 V supply voltage, achieves a 70-dB DC gain and 40° phase margin. It achieves a noise floor of 5 within the frequency range from 1 Hz to 10 kHz. The current consumption of the CMOS photoreceptor is 827 nA. The achieved performances make it one of the best among state-of-the-art photoreceptor in terms of noise and power consumption. This paper shows the need for the design of phototransduction circuit at low voltage, low noise and how these constraints are reflected in the design of CMOS vision sensor.


  • N. Brochard, J. Nebhen, J. Dubois, D. Ginhac

    A 1000 µm2 3D-IC Multi-Resolution Digital Pixel Sensor , SPIE Photonics Europe Conference, Brussels, Belgium , 2016-04-03

    [Abstract]
    Abstract
    This paper presents a digital pixel sensor (DPS) integrating a sigma-delta analog-to-digital converter (ADC) at pixel level. The digital pixel includes a photodiode, a delta-sigma modulation and a digital decimation filter. It features adaptive dynamic range and multiple resolutions (up to 10-bit) with a high linearity. A specific row decoder and column decoder are also designed to permit to read a specific pixel chosen in the matrix and its neighborhood of 4 x 4. Finally, a complete design with the CMOS 130 nm 3D-IC FaStack Tezzaron technology is also described, revealing a high fill-factor of about 80%.


New Events

  • 19 Nov
    Habilitation dissertation defense

    Dear colleagues and friends, You are cordially invited to the Habilitation dissertation defense of Dr Farès Tounsi, to be held on Friday, October 27th, 2017 entitled "Development and Analysis of CMOS-Based MEMS Microsensors"...

    Nov 19, 2017 | Read More

  • 19 Jul
    Doctoral dissertation defense

    Dear colleagues and friends, You are cordially invited to doctoral dissertation defense of Mohamed Hadj Said, to be held on Thursday, July 20th, 2017 entitled "Design, modeling and fabrication of a MEMS electrodynamic micro-sensor"...

    Jul 19, 2017 | Read More

  • 17 Sep
    Doctoral dissertation defense

    C'est avec un immense plaisir que je vous invite à ma soutenance de thèse de doctorat, qui aura lieu nchallah le lundi 28 Mars 2016 à 11h à l'Amphi 6 de l'ENIS. Le sujet est intitulé...

    Sep 17, 2016 | Read More

  • 30 Dec
    Doctoral dissertation defense
    Dear colleagues and friends, You are cordially invited to doctoral dissertation defense of Baligh Neji, to be held on Thursday, December 29th 2016, entitled "Design and development of an intelligent Self-Parking System for the next vehicles...

    Dec 30, 2016 | Read More

  • 14 Jan
    Doctoral dissertation defense

    Dear colleagues and friends, You are cordially invited to doctoral dissertation defense of Hanene Rouabeh, to be held on Thursday, December 29th, 2016 entitled "Contribution to the development of a driver assistance based robotic system"...

    Jan 14, 2017 | Read More

IEEE Solid State Tunisia Chapter Activities

  • 24 Jun
    Conference Invitation about MEMS

    We would like to invite interested IEEE members & researchers to a distinguished talk presented by « Prof. V. Ramgopal Rao » who is the Institute Chair ...

    Jun 24, 2014 | Read More



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