Concept

Loop gain

Publications associées (48)

Low-power and high-performance Automatic Gain Control systems based on nanoscale Field Effect Diode and SOI-MOSFET

The Automatic Gain Control (AGC) systems based on nanoscale Field Effect Diode (FED) and double gate silicon on insulator (SOI) MOSFET are investigated in this paper. Using double gate devices leads to more flexibility in gain controlling, improving perfor ...

2010

Experimental vertical stability studies for ITER performance and design guidance

Jonathan Bryan Lister

Operating experimental devices have provided key inputs to the design process for ITER axisymmetric control. In particular, experiments have quantified controllability and robustness requirements in the presence of realistic noise and disturbance environme ...

2009

Design methodology for CMOS distributed amplifiers

Catherine Dehollain

The design of distributed amplifiers in a CMOS process is investigated. In particular, the impact of parasitic elements from the transistors and from interstage inductors is studied. A methodology for determining an optimum design, including the number of ...

2008

1-to-40 10 Gb/s Channel Multicasting and Amplification in Wideband Parametric Amplifier

Camille Sophie Brès

All-optical 1-to-40 multicasting of 10-Gb/s intensity modulated nonreturn-to-zero data is experimentally demonstrated in an architecture based on a one-pump modulated wideband parametric optical amplifier. The unique combination encompassing a wideband mul ...

Institute of Electrical and Electronics Engineers2008

Robust Loop Shaping Controller Design for Spectral Models by Quadratic Programming

Alireza Karimi, Roland Longchamp, Gorka Galdos Sanz de Galdeano

A quadratic programming approach is proposed to tune fixed-order linearly parameterized controllers for stable LTI plants represented by spectral models. The method is based on the shaping of the open-loop or closed-loop frequency functions in the Nyquist ...

2007

Chronic activation in presymptomatic amyotrophic lateral sclerosis (ALS) mice of a feedback loop involving Fas, Daxx, and FasL

Patrick Aebischer

The reasons for the cellular specificity and slow progression of motoneuron diseases such as ALS are still poorly understood. We previously described a motoneuron-specific cell death pathway downstream of the Fas death receptor, in which synthesis of nitri ...

2006

Auto-ajustement de régulateurs PID robustes dans le domaine fréquentiel

Daniel Garcia

This work considers the adjustment of proportional-integral-derivative (PID) controllers. Because of their very simple structures, this kind of controllers are very appreciated, and used abundantly by the industrial community. The restricted number of the ...

EPFL2006

PID controller design with constraints on sensitivity functions using loop slope adjustment

Alireza Karimi, Roland Longchamp, Daniel Garcia

This paper presents a PID controller design method for stable minimum- phase systems. The approach is similar to the one proposed in the so-called modified Ziegler- Nichols method, where only one point on the frequency response of the plant is measured and ...

2006

Model-Free Precompensator and Feedforward Tuning Based on the Correlation Approach

Alireza Karimi, Roland Longchamp, Mark Edward John Butcher

High performance output tracking can be achieved by precompensator or feedforward controllers based on the inverse of the closed-loop system or the plant model. However, it has been shown that these inverse controllers can affect adversely the tracking per ...

2005

Acceleration of a gain-clamped semiconductor optical amplifier by the optical speed-up at transparency scheme

Benoît Marie Joseph Deveaud, Andrea Crottini, Marc-André Dupertuis

The optical speed-up at transparency principle has been successfully applied to a gain-clamped semiconductor optical amplifier yielding a remarkable acceleration in the gain recovery of the device as well as to the disappearance of the typical relaxation o ...

2004

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