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Alexandre Schmid

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Related publications (158)

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Walsh-Hadamard-Based Orthogonal Sampling Technique for Parallel Neural Recording Systems

Alexandre Schmid, Reza Ranjandish

Walsh-Hadamard based orthogonal sampling of signals is studied in this paper, and an application of this technique is presented. Using orthogonal sampling, a single analog-to-digital converter (ADC) only is sufficient to perform parallel (simultaneous) rec ...

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2021

Optimization of nanoelectronic systems' reliability under massive defect density using Cascaded R-fold modular redundancy

Yusuf Leblebici, Alexandre Schmid, Milos Stanisavljevic

The theoretical analysis of R-fold modular redundancy, cascaded R-fold modular redundancy and NAND multiplexing is presented and these fault-tolerant techniques are compared in terms of resistance to massive levels of defect density. Optimal cluster size a ...

2008

A Spherical Multi-camera System with Real-time Omnidirectional Video Acquisition Capability

Yusuf Leblebici, Alexandre Schmid, Vladan Popovic, Hossein Afshari

A multi-camera system inspired from the visual system of flying insects is introduced which is referred to as the Panoptic camera. In the Panoptic system each camera is mounted over a hemispherical geometry and has its own vision of surrounding and distinc ...

Institute of Electrical and Electronics Engineers2012

Wireless Power and Data Transceiver in A Central Implanted Unit for Biomedical Applications

Alexandre Schmid, Catherine Dehollain, Mohammad Javad Karimi, Soroush Mehdi

This paper presents a wireless power and data transmitter designed for central implanted units (CIUs) in the context of biomedical applications. This CIU is positioned within the human body or brain to supply power from stored battery energy to specific im ...

Institute of Electrical and Electronics Engineers Inc.2024

A fully on-chip LDO voltage regulator with 37 dB PSRR at 1 MHz for remotely powered biomedical implants

Yusuf Leblebici, Catherine Dehollain, Alexandre Schmid, Kanber Mithat Silay, Vahid Majidzadeh Bafar

This article presents a fully on-chip low-power LDO voltage regulator dedicated to remotely powered wireless cortical implants. This regulator is stable over the full range of alternating load current and provides fast load regulation achieved by applying ...

Springer US2011

Real-Time Omnidirectional Imaging System with Interconnected Network of Cameras

Yusuf Leblebici, Alexandre Schmid, Vladan Popovic, Hossein Afshari, Kerem Seyid

The Panoptic camera is an omnidirectional multi-aperture visual system which is realized by mounting multiple imaging sensors on a hemispherical frame. In this chapter, we will present a novel distributed and parallel implementation of the real-time omnidi ...

Springer-Verlag2015

A Wireless Power and Bi-Directional Data Transfer System Using A Single Inductive Link for Biomedical Implants

Alexandre Schmid, Catherine Dehollain, Mohammad Javad Karimi, Soroush Mehdi

This paper presents a wireless power and data conversion unit, designed to receive power and data via a single inductive link with a focus on applications in implanted biomedical devices. The system provides a reliable power supply for electronic circuits ...

Institute of Electrical and Electronics Engineers Inc.2023

Wirelessly Powered and Bi-Directional Data Communication System With Adaptive Conversion Chain for Multisite Biomedical Implants Over Single Inductive Link

Alexandre Schmid, Catherine Dehollain, Mohammad Javad Karimi, Yuxuan Zhou, Menghe Jin

A wirelessly powered and data communication system is presented which is implemented as a full system, designed for multisite implanted biomedical applications. The system is capable of receiving wireless power and data communication for each implant separ ...

2024

A Fully-Integrated IC with 0.85-uW/Channel Consumption for Epileptic iEEG Detection

Alexandre Schmid, Mahsa Shoaran

Feature extraction from a multichannel compressed neural signal is introduced in this brief. Compressive sensing (CS) is an efficient method for reducing the transmission data rate of sparse biological signals and lowering the power consumption of resource ...

Ieee-Inst Electrical Electronics Engineers Inc2015

Design and Realization of a Fault-Tolerant 90nm Cryptographic Engine Capable of Performing under Massive Defect Density

Yusuf Leblebici, Alexandre Schmid, Milos Stanisavljevic

This paper presents a new approach for assessing the reliability of nanometer-scale devices prior to fabrication and a practical reliability architecture realization. A four-layer architecture exhibiting a large immunity to permanent as well as random fail ...

ACM2007

Split weight distribution learning for binary neural networks exploiting nano-memristive graphene/sumanene/graphene devices

Alexandre Schmid

Research in artificial intelligence (AI) and neural network (NN) technologies has been boosted by recent hardware advances, while the emergence of self-synthesized materials such as nanocarbons has attracted much attention to overcome the limitations of Si ...

IOP Publishing Ltd2025

Power-Efficient CMOS Image Acquisition System based on Compressive Sampling

Yusuf Leblebici, Pierre Vandergheynst, Alexandre Schmid, Mahdad Hosseini Kamal, Nikola Katic, Mustafa Kilic

A novel compressive sampling scheme suitable for highly scalable hardware implementations is presented. The prototype design is implemented in a 0.18um standard CMOS technology and utilizes compressed acquisition to boost the overall power efficiency. Spec ...

IEEE2013

A High-Gain Transimpedance Amplifier Using Highly-Linear and Symmetric Multi-Stage Pseudo-Resistors

Alexandre Schmid, Mehdi Saberi

© 2024 IEEE.This paper presents a high gain, low power, and highly linear structure for integrator-differentiator transimpedance amplifiers (TIAs) employed in biological recording systems. In order to improve the linearity of the structure, a symmetric and ...

Institute of Electrical and Electronics Engineers Inc.2024

Compressive Multichannel Cortical Signal Recording

Yusuf Leblebici, Pierre Vandergheynst, Alexandre Schmid, Mahsa Shoaran, Mahdad Hosseini Kamal

This paper presents a novel approach to acquire multichannel wireless intracranial neural data based on a compressive sensing scheme. The designed circuits are extremely compact and low-power which confirms the relevance of the proposed approach for multic ...

IEEE2013

A Low-Power and High-Precision Time- Domain Winner-Take-All Circuit Based on the Group Search Algorithm

Alexandre Schmid

In this paper, a low-power and high-precision time-domain winner-take-all (WTA) circuit is proposed which is based on a novel group search algorithm. The proposed method, which determines the winner input within a single clock cycle, not only demands no mu ...

Institute of Electrical and Electronics Engineers Inc.2024

Hemispherical Multiple Camera System for High Resolution Omni-Directional Light Field Imaging

Yusuf Leblebici, Alexandre Schmid, Hossein Afshari, Kerem Seyid, Abdulkadir Akin, Ömer Cogal

Inspiration from light field imaging concepts has led to the construction of multi-aperture imaging systems. Using multiple cameras as individual apertures is a topic of high relevance in the light field imaging domain. The need for wide field-of-view (FOV ...

Institute of Electrical and Electronics Engineers2013

A Wireless Power Conversion Chain With Fully On-Chip Automatic Resonance Tuning System for Biomedical Implants

Alexandre Schmid, Catherine Dehollain, Mohammad Javad Karimi, Menghe Jin

This paper presents a wireless power conversion system designed for biomedical implants, with integrated automatic resonance tuning. The automatic tuning mechanism improves power transfer efficiency (PTE) by finely tuning the resonant frequency of the powe ...

Ieee-Inst Electrical Electronics Engineers Inc2024

A Micropower Neural Recording Amplifier with Improved Noise Efficiency Factor

Yusuf Leblebici, Alexandre Schmid, Vahid Majidzadeh Bafar

This article presents a neural recording amplifier suitable for large-scale integration with multi-electrode arrays (MEAs) in very low-power microelectronic cortical implants. The proposed amplifier is the most energy-efficient structure reported to date, ...

2009

A 16-Channel 1.1mm2 Implantable Seizure Control SoC with Sub-μW/Channel Consumption and Closed-Loop Stimulation in 0.18μm CMOS

Yusuf Leblebici, Alexandre Schmid, Mahsa Shoaran

We present a 16-channel seizure detection system-on-chip (SoC) with 0.92μW/channel power dissipation in a total area of 1.1mm² including a closed-loop neural stimulator. A set of four features are extracted from the spatially filtered neural data to achiev ...

IEEE2016

Selective Redundancy-Based Design Techniques for the Minimization of Local Delay Variations

Yusuf Leblebici, Alexandre Schmid, Milos Stanisavljevic

In this paper a novel approach to optimize digital integrated circuits yield with regards to speed and area/power for aggressive scaling technologies is presented. The technique is intended to reduce the effects of intra-die variations using redundancy app ...

IEEE Service Center2010