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This paper presents the stochastic characterization of the phase-noise spectrum of free-running oscillators in the envelope domain. The flicker-noise sources are modeled as an infinite summation of Ornstein-Uhlenbeck processes. Inputs of the formulation are parameters extracted with harmonic balance (HB) by means of the carrier-modulation approach. These(More)
In this paper, a numerical technique for the determination of the phase-noise spectrum of free-running oscillators is presented. The technique is based on envelope transient and can be applied to any commercial simulator on which this analysis method is available. The main advantage of the technique is that it allows simulating the near carrier phase noise(More)
—In this paper we present Ethane, a parallel search algorithm specifically designed for its execution on heterogeneous hardware environments. With Ethane we propose an algorithm inspired in the structure of the chemical compound of the same name, implementing a heterogeneous island model based in the structure of its chemical bonds. We also propose a schema(More)
In this article we present Ethane, a parallel heterogeneous metaheuristic model specifically designed for its execution on heterogeneous hardware environments. With Ethane we propose a hybrid parallel search algorithm inspired in the structure of the chemical compound of the same name, implementing a heterogeneous island model based in the structure of the(More)
In this work, harmonic balance (HB) and envelope- transient formulations of coupled phase-locked loops (CPLLs) are presented. The CPLL has the added difficulty of its autonomous behavior since no reference oscillator is present. The new formulation takes into account the autonomy of the system, introducing a special set of state variables, which depend on(More)
Several methods have been proposed for representing vector fields (glyphs, particles, icons, Streamlines, Hyperstreamlines, Spot Noise, LIC, etc.), being streamlines and LIC the two most important. In previous work we already discussed thoroughly the advantages and drawbacks of these methods, and proposed a new, parametrized method that combines(More)
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