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Alexandre Schmid

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Related publications (158)

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Fault-Tolerance of Robust Feed-Forward Architecture Using Single-Ended and Differential Deep-Submicron Circuits Under Massive Defect Density

Yusuf Leblebici, Alexandre Schmid, Milos Stanisavljevic

An assessment of the fault-tolerance properties of single-ended and differential signaling is shown in the context of a high defect density environment, using a robust error-absorbing circuit architecture. A software tool based on Monte-Carlo simulations i ...

IEEE2006

Column-Separated Compressive Sampling Scheme for Low Power CMOS Image Sensors

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 scheme utilizes an identical pseudo-random sequence for every image column, therefore reducing in-pixel hardware complexity and allowing measurement ...

IEEE2013

Output Probability Density Functions of Logic Circuits: Modeling and Fault-Tolerance Evaluation

Yusuf Leblebici, Alexandre Schmid, Milos Stanisavljevic

The precise evaluation of the reliability of logic circuits has a significant importance in highly-defective and future nanotechnologies. It allows efficient comparison of fault-tolerance techniques, and enables designs improvement with respect to their re ...

IEEE Service Center2010

Compressive Image Acquisition in Modern CMOS IC Design

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

Compressive Sampling (CS) offers bandwidth, power and memory size reduction compared to conventional (Nyquist) sampling. However, very few Integrated Circuit (IC) designs based on CS exist due to the missing link between the well-established CS theory on o ...

Wiley-Blackwell2013

Analysis and Characterization of Variability in Subthreshold Source-Coupled Logic Circuits

Yusuf Leblebici, Alexandre Schmid, Mahsa Shoaran, Seyed Armin Tajalli

This article explores the effect of device parameter variations on the performance of subthreshold source-coupled logic (STSCL) circuits. A test chip has been fabricated in a standard CMOS 90 nm technology to study the matching properties of STSCL circuits ...

2015

Implantable Neuro-Modulation Devices and Technology

Alexandre Schmid

Implantable electronic medical devices that operate in closed-loop allow efficient neuro-modulation. Area and power are to be carefully balanced to improve the system autonomy and safety. New digital modulation schemes with implementation in the front-end ...

IEEE, ELECTRON DEVICES SOC & RELIABILITY GROUP2021

All Wireless, 16-channel Epilepsy Control System with Sub-mu W/channel and Closed-loop Stimulation Using a Switched-Capacitor-Based Active Charge Balancing Method

Alexandre Schmid, Catherine Dehollain, Franco Maloberti, Kerim Türe, Reza Ranjandish

An all wireless closed-loop stimulation system for epilepsy control is presented that generates charged-balanced programmable stimulation current pulses upon a seizure is detected. The proposed system has highly flexible stimulation parameters thanks to th ...

IEEE2018

A Delay and Power Efficient Voltage Level Shifter with Low Leakage Power

Alexandre Schmid, Mehdi Saberi

This paper presents a new power-efficient and high-speed voltage level shifter. In the proposed structure, the existing contentions at the internal nodes are reduced using auxiliary transistors and feedback networks, leading to a significant reduction in t ...

IEEE2023

Three-dimensional Tip Electrode Array Technology for High Resolution Neuro-Electronic System used in Electrophysiological Experiments in-vitro

Yusuf Leblebici, Alexandre Schmid, Neil Joye

A three-dimensional tip electrode array technology for in- vitro electrophysiological experiments is presented. Based on simulation results obtained with a finite element model of the neuron-electrode interface, it has been shown that the electrical coupli ...

2008

Extracellular recording system based on amplitude modulation for CMOS microelectrode arrays

Yusuf Leblebici, Alexandre Schmid, Neil Joye

An innovative readout channel, based on analog amplitude modulation of the signals recorded by each sensing site, is developed for high-density CMOS-based microelectrode arrays. A single amplification stage simultaneously records the neural activity acquir ...

2010

Trinocular Adaptive Window Size Disparity Estimation Algorithm and Its Real-Time Hardware

Yusuf Leblebici, Alexandre Schmid, Raffaele Capoccia, Abdulkadir Akin, Jonathan Emmanuel D Narinx

This paper proposes a hardware-oriented trinocular adaptive window size disparity estimation (T-AWDE) algorithm and the first real-time trinocular disparity estimation (DE) hardware that targets high-resolution images with high-quality disparity results. T ...

2015

High Input Impedance Front-End Amplifier for Noncontact Bio-Potential Recording

Alexandre Schmid

In this paper, a high input impedance front-end amplifier is proposed for non-contact bio-potential recording systems. The proposed structure uses a positive feedback network to deliver a neutralization current back to the input node of the circuit to neut ...

Institute of Electrical and Electronics Engineers Inc.2023

A Novel Compressive Sensing Architecture for High-Density Biological Signal Recording

Alexandre Schmid, Mahsa Shoaran, Hossein Afshari

The massive amount of data recorded by dense electrode arrays which are routinely connected to Nyquist-sampling signal conditioning blocks introduces new design challenges for implantable and wireless biological signal acquisition. Five different architect ...

2014

A Two-Wired High Input Impedance and High CMRR Active Electrode Insensitive to Component Mismatch

Alexandre Schmid, Mehdi Saberi

This article proposes a new two-wired amplifying active electrode (AE), presenting a high input impedance and a high common-mode rejection ratio (CMRR). In the proposed structure, the input impedance and the CMRR of the system are considerably increased by ...

Ieee-Inst Electrical Electronics Engineers Inc2024

Programmable Seizure Detector Using a 32-bit RISC Processor for Implantable Medical Devices

Alexandre Schmid, Keyvan Farhang Razi

A programmable patient-customized epileptic seizure detector is proposed in this paper to enable neurologists and patients to have constructive interactions with the implantable medical device. The programmability feature is enabled by designing a low-powe ...

IEEE2023

Design and Implementation of Multi-camera Systems Distributed over a Spherical Geometry

Yusuf Leblebici, Alexandre Schmid, Hossein Afshari, Kerem Seyid

The current trend in constructing high-end computing systems consists of parallelizing large numbers of processors. A similar trend is observed in digital imaging where multiple camera inputs are utilized to obtain multiple images of a scene and thus enhan ...

2012

CMOS Compressed Imaging by Random Convolution

Yusuf Leblebici, Pierre Vandergheynst, Alexandre Schmid, Laurent Jacques, Vahid Majidzadeh Bafar

We present a CMOS imager with built-in capability to perform Compressed Sensing. The adopted sensing strategy is the random Convolution due to J. Romberg. It is achieved by a shift register set in a pseudo-random configuration. It acts as a convolutive fil ...

2009

A Review of Microelectronic Systems and Circuit Techniques for Electrical Neural Recording Aimed at Closed-Loop Epilepsy Control

Alexandre Schmid, Reza Ranjandish

Closed-loop implantable electronics offer a new trend in therapeutic systems aimed at controlling some neurological diseases such as epilepsy. Seizures are detected and electrical stimulation applied to the brain or groups of nerves. To this aim, the signa ...

2020

A 4-channel 5.04 μW 0.325 mm2 Orthogonal Sampling-Based Parallel Neural Recording System

Alexandre Schmid, Reza Ranjandish

The application of orthogonal sampling for parallel neural recording is presented in this paper. Orthogonal sampling enables reducing the number of the I Cs in conventional recording systems into one single unit. Consequently, the ADC bandwidth and dynamic ...

IEEE2018

Real-Time Hardware Implementation of Multi-Resolution Image Blending

Yusuf Leblebici, Alexandre Schmid, Vladan Popovic, Kerem Seyid

A novel real-time implementation of a multi-resolution image blending algorithm is presented in this paper. A multi-resolution decomposition of the input is used to blend multiple images at different scales. Processing time is shortened by designing a pipe ...

2013