Concept

Oscillateur Colpitts

Publications associées (44)

Stability Considerations for Variable Impedance Control

Aude Billard, Klas Jonas Alfred Kronander

Impedance control is a commonly used control architecture for robotic manipulation. For increased flexibility, the impedance can be programmed to vary during the task. This has important implications on the stability properties of the control system, which ...

Ieee-Inst Electrical Electronics Engineers Inc2016

Frequency jumps in single chip microwave LC oscillators

Giovanni Boero, Marco Grisi, Gabriele Gualco

We report on the experimental observation of oscillation frequency jumps in microwave LC oscillators fabricated using standard complementary metal-oxide-semiconductor technologies. The LC oscillators, operating at a frequency of about 20 GHz, consist of a ...

American Institute of Physics2014

Correlated Decay of Triplet Excitations in the Shastry-Sutherland Compound SrCu2(BO3)(2)

Henrik Moodysson Rønnow, Joël Mesot, Mohamed Zayed, Kazimierz Conder

The temperature dependence of the gapped triplet excitations (triplons) in the 2D Shastry-Sutherland quantum magnet SrCu2(BO3)(2) is studied by means of inelastic neutron scattering. The excitation amplitude rapidly decreases as a function of temperature, ...

American Physical Society2014

Cryogenic single-chip electron spin resonance detector

László Forró, Stefano Alberti, Giovanni Boero, Andrzej Sienkiewicz, Jens Anders, Gabriele Gualco

We report on the design and characterization of a single-chip electron spin resonance detector, operating at a frequency of about 20 GHz and in a temperature range extending at least from 300 K down to 4 K. The detector consists of an LC oscillator formed ...

Elsevier2014

Time-Delayed Interactions in Networks of Self-Adapting Hopf Oscillators

Max-Olivier Hongler, Philippe Blanchard, Julio Rodriguez

A network of coupled limit cycle oscillators with delayed interactions is considered. The parameters characterizing the oscillator’s frequency and limit cycle are allowed to self-adapt. Adaptation is due to time-delayed state variables thatmutually interac ...

2013

Effects of Robotic Knee Exoskeleton on Human Energy Expenditure

Tadej Petric

A number of studies discuss the design and control of various exoskeleton mechanisms, yet relatively few address the effect on the energy expenditure of the user. In this paper, we discuss the effect of a performance augmenting exoskeleton on the metabolic ...

2013

Surpassing Fundamental Limits of Oscillators Using Nonlinear Resonators

Luis Guillermo Villanueva Torrijo

In its most basic form an oscillator consists of a resonator driven on resonance, through feedback, to create a periodic signal sustained by a static energy source. The generation of a stable frequency, the basic function of oscillators, is typically achie ...

American Physical Society2013

A New Set of Electrodes for Coaxial Quarter Wave Switched Oscillators

We present a new profile for the electrodes forming the radial transmission line of a switched oscillator (SWO). The profile is formed using a curvilinear orthogonal space based on a specific 2-D transformation called logarithmic-tangent. The proposed prof ...

Ieee-Inst Electrical Electronics Engineers Inc2013

Collective modes of coupled phase oscillators with delayed coupling

Andrew Charles Oates

We study the effects of delayed coupling on timing and pattern formation in spatially extended systems of dynamic oscillators. Starting from a discrete lattice of coupled oscillators, we derive a generic continuum theory for collective modes of long wavele ...

2012

An Artificial Muscle Ring Oscillator

Dielectric elastomer artificialmuscles have great potential for the creation of novel pumps, motors, and circuitry. Control of these devices requires an oscillator, either as a driver or clock circuit, which is typically provided as part of bulky, rigid, a ...

2012

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