Concept

Valve amplifier

Publications associées (109)

Limiting Amplifiers for Next-Generation Multi-Channel Optical I/O Interfaces in SoCs

Yusuf Leblebici, Paul Victor Georges Muller

We present two fully differential limiting amplifiers with and without inductive peaking, designed and integrated in 0.18mm digital CMOS technology. The key design trade-offs, the importance of inductive coupling between neighboring channels, as well as th ...

2005

Spatial and temporal characterization of semiconductor optical amplifiers and novel enhancement configurations

In the ever-growing world of optical telecommunications. Semiconductor Optical Amplifiers (SOAs) are called to play an increasingly important role. Their attractive performances both in the linear and non-linear regime along with their reduced cost and sma ...

EPFL2004

Modelling Differential Pairs For Low-Distortion Amplifier Design

Oscar De Feo

The differential pair is one of the basic amplifying stages in amplifier design. Aiming at the the design of low-distortion amplifiers, a simple model for a differential pair is derived using the Volterra series. The parameters in this model correspond to ...

2003

Procedural Analog Design (PAD) tool

Maher Kayal, Marc Pastre, Danica Stefanovic

This paper presents a new Procedural Analog Design tool called PAD. It is a chart-based design environment dedicated to the design of analog circuits aiming to optimise design and quality by finding good tradeoffs. This interactive tool allows step-by-step ...

2003

Predicting Nonlinear Distortion in Common-Emitter Stages for Amplifier Design Using Volterra Series

Martin Hasler, Oscar De Feo

In this paper we present a method for predicting nonlinear distortion in electronic circuits using the Volterra series. Simple expressions for the distortion in a Common-Emitter stage are determined. Designers may use these expressions to get a quick insig ...

2002

Density clamping and longitudinal spatial hole burning in a gain-clamped semiconductor optical amplifier

Benoît Marie Joseph Deveaud, Andrea Crottini, Marc-André Dupertuis, Daniel Marti, Lars Kappei

We have directly measured, under operating conditions, the distributions of carrier densities and temperatures in a gain-clamped semiconductor optical amplifier designed for operation at 1.55 mum. As expected, longitudinal spatial hole burning is much smal ...

2002

Fiber amplifiers for coherent space communication

René Dändliker

We report on the application of double-clad doped fiber amplifiers for coherent space communication systems using a master oscillator power amplifier (MOPA) design at 1.06 μm. The master oscillator is either a single-frequency Nd:YAG solid-state laser or a ...

2001

The interface amplifier and timing generator unit for control of operation of an off-line time-resolved X-ray spectrometer

Basil Duval

This paper describes an on-site developed interface amplifier and timing generator unit for the control of operation of an X-ray spectrometer, aimed at obtaining off-line time-resolved pulse height analysis spectra, using at single channel of a digital tra ...

2000

High-Gain Solid-State and Fiber Amplifier-Chain for High-Power Coherent Communication

René Dändliker

We report on the experimental results of a dual-stage amplifier combining a Nd-doped double-clad fiber and a Nd-doped YAG crystal. We obtained up to 3.5-W single-mode single-frequency output power with 28-dB gain. This is, to the best of our knowledge, the ...

1999

Observation of dark-pulse formation in gain-clamped semiconductor optical amplifiers by cross-gain modulation

Benoît Marie Joseph Deveaud, Marc-André Dupertuis

We have measured the ultrafast simultaneous cross-gain and laser mode dynamics in a gain-clamped semiconductor amplifier perturbed by an intense detuned 150 fs pump pulse. Besides relaxation oscillations, we demonstrate the instantaneous formation of a dar ...

1999

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