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Alexandre Schmid

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Publications associées (158)

Amplitude modulation based readout for very dense active microelectrode arrays

Alexandre Schmid, Yusuf Leblebici, Neil Joye

A readout method which is suitable for high-density active microelectrode arrays used in electrophysiology experiments is presented. Amplitude modulation of consecutive channels enables simultaneous recording and transmission of the signals recorded on mul ...

2011

A 16-channel 220 µW neural recording IC with embedded delta compression

Alexandre Schmid, Yusuf Leblebici, Vahid Majidzadeh Bafar

A 16-channel neural action potential recording IC suitable for large-scale integration with multi-electrode arrays (MEAs) is presented. A closed-loop gain of 60 dB in the action potential band is achieved by cascading differential gain-stages utilizing a n ...

2011

Stochastic Resonance In A Balanced Pair Of Single-Electron Boxes

Alexandre Schmid

Stochastic resonance in a fundamental single-electron circuit, i.e., a balanced pair of single-electron boxes, is observed and presented theoretically, where the signal-to-noise ratio (SNR) of the internal states stimulated by responding to a periodic subt ...

2011

Energy Efficient Low-Noise Neural Recording Amplifier With Enhanced Noise Efficiency Factor

Alexandre Schmid, Yusuf Leblebici, Vahid Majidzadeh Bafar

This paper presents a neural recording amplifier array suitable for large-scale integration with multielectrode arrays in very low-power microelectronic cortical implants. The proposed amplifier is one of the most energy-efficient structures reported to da ...

2011

Very High Density Microelectrode Array with Monolithically Integrated Readout Circuits

Alexandre Schmid, Yusuf Leblebici, Neil Joye, Sedigheh Hashemi

This paper presents the hardware realization and modeling of high-density microelectrode arrays including both microelectronic readout amplifiers as well as three-dimensional microelectrodes forming a fully integrated CMOS compatible system enabling resear ...

2010

AM Modulation-based CMOS Readout Circuit for High-density Microelectrode Arrays

Alexandre Schmid, Yusuf Leblebici, Neil Joye

An innovative readout channel, based on analog amplitude modulation (AM) of the signals recorded by each electrode, is developed for high-density CMOS-based MEAs. This new readout method enables the design of a low-noise amplification stage while still rea ...

2010

A (256x256) Pixel 76.7mW CMOS Imager/ Compressor Based on Real-Time In-Pixel Compressive Sensing

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

A CMOS imager is presented which has the abil- ity to perform localized compressive sensing on-chip. In-pixel convolutions of the sensed image with measurement matrices are computed in real time, and a proposed programmable two- dimensional scrambling tech ...

IEEE Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2010

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

Alexandre Schmid, Yusuf Leblebici, 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

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

Alexandre Schmid, Yusuf Leblebici, 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

Delta Compression of Neural Recordings for High-density CMOS-based Microelectrode Arrays

Alexandre Schmid, Yusuf Leblebici, Neil Joye, Michelangelo Carrozzo

Recent high-density CMOS-based MEAs contain thousands of electrodes. Hence, an off-chip acquisition system performing data compression prior to visualization and analysis on a computer is required in order to handle the large amount of data generated by ac ...

2010

Extracellular recording system based on amplitude modulation for CMOS microelectrode arrays

Alexandre Schmid, Yusuf Leblebici, 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

Low-distortion switched-capacitor event-driven analogue to-digital converter

Alexandre Schmid, Yusuf Leblebici, Vahid Majidzadeh Bafar

An event-driven analogue-to-digital converter (ADC) architecture is proposed. The proposed architecture has less sensitivity to amplifier and DAC nonlinearity, and reduces the swing and dynamic common-mode range requirement of the operational transconducta ...

Institution of Engineering and Technology2010

CMOS Compressed Imaging by Random Convolution

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

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

Evaluation sismique de bâtiments existants - Approche basée sur le risque introduite en Suisse

Alexandre Schmid, Pierino Lestuzzi

2009

A Bio-Inspired Image Processor for Edge Detection with Single-Electron Circuits

Alexandre Schmid, Yusuf Leblebici

2009

Optimization of Nanoelectronic Systems Reliability by Reducing Logic Depth

Alexandre Schmid, Yusuf Leblebici, Milos Stanisavljevic

2009

A Neuromorphic Single-Electron Circuit for Noise-Shaping Pulse-Density Modulation

Alexandre Schmid, Yusuf Leblebici

2009

A cell-electrode interface noise model for high-density microelectrode arrays

Alexandre Schmid, Yusuf Leblebici, Neil Joye

A cell-electrode interface noise model is developed which is dedicated to enable the co-simulation of the cell-electrode electrical characteristics, along with the electronics of novel CMOS-based MEA. The electrode noise is investigated for Pt and Pt black ...

IEEE2009

Analytical and compact models of the ONO capacitance in embedded non-volatile flash devices

Alexandre Schmid, Yusuf Leblebici, Davide Garetto

The floating gate (FG) potential VFG in a non–volatile flash memory (NVM) device is the main parameter controlling the behavior of the cell. A common technique to model VFG is based on the calculation of the coupling coefficients between all the terminals ...

2009

On the Reliability of Post-CMOS and SET Systems

Alexandre Schmid, Yusuf Leblebici, Milos Stanisavljevic

The necessity of applying fault-tolerant techniques to increase the reliability of future nano-electronic systems is an undisputed fact, dictated by the high density of faults that will plague these chips. The averaging and thresholding fault-tolerant tech ...

2009

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