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Christian Enz

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Publications associées (213)

A 2.4-GHz low complexity polar transmitter using dynamic biasing for IEEE 802.15.6

Christian Enz, Raghavasimhan Thirunarayanan, Vladimir Kopta, Franz Xaver Pengg

A 2.4 GHz polar transmitter compliant with the IEEE 802.15.6 standard is presented in this paper. A Linearized class-C power amplifier, employing dynamic biasing is used to minimize the adjacent channel interference and satisfy the defined spectrum mask re ...

IEEE2015

Avalanche noise diodes: A compact circuit model compatible with advanced CAD tools

Christian Enz, Pierre-André Farine, Cyril Botteron, Gabriele Tasselli

This paper proposes, for the first time, a compact model for avalanche noise diodes that can easily be inserted in advanced CAD tools. The model is based on the theory of the Read type microwave avalanche diodes. It fully accounts for the electronic tuning ...

IEEE2015

A correlated multiple sampling passive switched capacitor circuit for low light CMOS image sensors

Christian Enz, Assim Boukhayma

After a brief review of the principle of correlated multiple sampling (CMS) and its implementation techniques in CIS readout chains, a simple CMS passive circuit that (i) requires no additional active circuitry, (ii) has no impact on the output dynamic ran ...

IEEE2015

Automatic Hand Phantom Map Detection Methods

Christian Enz, Claudio Bruschini, Jörn Justiz, Huaiqi Huang, Tao Li

Many amputees have maps of referred sensation from their missing hand on their residual limb (phantom maps). This skin area can serve as a target for providing amputees with tactile sensory feedback. Providing tactile feedback on the phantom map can improv ...

2015

Energy-Efficient Digital Design Through Inexact and Approximate Arithmetic Circuits

Christian Enz, Vincent Frédéric Camus, Jérémy Lucien Maurice Schlachter

Inexact and approximate circuit design is a promising approach to improve performance and energy efficiency in technology-scaled and low-power digital systems. Such strategy is suitable for error tolerant applications involving perceptive or statistical ou ...

2015

Simple thermal noise estimation of OTA-based switched-capacitor filters

Christian Enz, François Krummenacher, Assim Boukhayma

This paper presents a new analytical method to simply estimate the integrated thermal noise in switched-capacitor filters (SCF). It is shown how the Bode theorem, which is theoretically valid only for continuous-time passive filters, can be extended to als ...

2015

Tactile Prosthetics in WiseSkin

Christian Enz, Stéphanie Lacour, Vladimir Kopta

IEEE Conference Publications2015

Automatic Generation of Inexact Digital Circuits by Gate-level Pruning

Christian Enz, Vincent Frédéric Camus, Jérémy Lucien Maurice Schlachter

Inexact or approximate circuits show great ability to reduce power consumption at the cost of occasional errors in comparison to their conventional counterparts. Even though the benefits of such circuits have been proven for many applications, they are not ...

2015

Energy-Efficient Inexact Speculative Adder with High Performance and Accuracy Control

Christian Enz, Vincent Frédéric Camus, Jérémy Lucien Maurice Schlachter

Inexact and approximate circuit design is a promising approach to improve performance and energy efficiency in technology-scaled and low-power digital systems. Such strategy is suitable for error-tolerant applications involving perceptive or statistical ou ...

2015

Reducing Energy Dissipation in ULP Systems: PLL-Free FBAR-Based Fast Startup Transmitters

Christian Enz, David Ruffieux, Raghavasimhan Thirunarayanan

The energy dissipated by conventional phase-locked-loop-based transmitters (TXs) during the long startup phase is a major bottleneck that reduces the energy autonomy of duty-cycled ultra-low-power systems. In order to tackle this problem, this paper presen ...

Institute of Electrical and Electronics Engineers2015

Recent trends in low-frequency noise reduction techniques for integrated circuits

Christian Enz, Assim Boukhayma

This paper presents the two main circuit techniques, namely autozeroing (AZ) and chopper stabilization (CS), that are used to reduce the 1/f noise and offset in amplifiers typically used in sensor electronics interfaces. After recalling their main properti ...

2015

Role of the gate in ballistic nanowire SOI MOSFETs

Christian Enz, Jean-Michel Sallese, Anurag Mangla

In this paper we report the results of Monte-Carlo simulations performed on double-gate ballistic MOSFETs with a geometry such that the gates overlap only a fraction of the channel. We present a qualitative analysis of the simulation results highlighting t ...

Elsevier2015

Near/Sub-Threshold Circuits and Approximate Computing: The Perfect Combination for Ultra-Low-Power Systems

Christian Enz, Vincent Frédéric Camus, Jérémy Lucien Maurice Schlachter

While sub/near-threshold design offers the minimal power and energy consumption, such approach strongly deteriorates circuit performances and robustness against PVT (process/voltage/temperature) variations, leading to gigantic speed penalties and large sil ...

IEEE2015

Data fusion for a hand prosthesis tactile feedback system

Christian Enz, Jörn Justiz, Huaiqi Huang, Ozan Unsal, Tao Li

Current myoelectrically controlled hand prostheses normally lack tactile feedback, thus limiting their functionalities and user acceptance. We propose a non-invasive tactile sensory feedback system, consisting miniaturized sensors, wireless communication m ...

IEEE2014

The WiseSkin artificial skin for tactile prosthetics: A power budget investigation

Christian Enz, Vladimir Kopta

The use of prosthetic hands are limited partly due to the fact that they lack the provision of sensory feedback to the user. A first step to providing sensory feedback is having adequate sensors in the prosthesis. The WiseSkin project targets the use of ar ...

IEEE2014

BSIM6: Analog and RF Compact Model for Bulk MOSFET

Christian Enz, Yogesh Singh Chauhan, Sourabh Khandelwal, Maria-Anna Chalkiadaki

BSIM6 is the latest industry-standard bulk MOSFET model from the BSIM group developed specially for accurate analog and RF circuit designs. The popular real-device effects have been brought from BSIM4. The model shows excellent source-drain symmetry during ...

Institute of Electrical and Electronics Engineers2014

Design optimization for low light CMOS image sensors readout chain

Christian Enz, Assim Boukhayma

Email Print Request Permissions For a CIS readout chain based on 4T pixel, column amplification and CDS, we confirm that thermal noise can be reduced to be neglected compared to 1/f noise using parameters independent of the pixel design, namely column leve ...

2014

Accurate RF modeling of nanoscale MOSFET using BSIM6 including low levels of inversion

Christian Enz, Maria-Anna Chalkiadaki

Nanoscale CMOS devices display very high peak transit frequency Ft of several hundreds of GHz. This feature can be exploited for reducing power consumption by shifting the operating point towards moderate or eventually weak inversion where the Ft still rea ...

Elsevier2014

Submicrometer Organic Thin-Film Transistors: Technology Assessment Through Noise Margin Analysis of Inverters

Christian Enz, Jean-Michel Sallese, Rolando Ferrini, Frédéric Zanella, Nenad Marjanovic, Franz Xaver Pengg

In this paper, we propose a methodology to evaluate the potential of submicrometer organic thin-film transistors (OTFTs) with nanoimprinted gate and self-aligned source and drain contacts. In the first step, the dedicated static model we previously reporte ...

Institute of Electrical and Electronics Engineers2014

Special Issue on Compact Modeling of Emerging Devices Foreword

Christian Enz

Institute of Electrical and Electronics Engineers2014

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