The purpose of this paper is to show how systems composed of multiple oscillators and resonators can achieve superior performance compared to a single oscillator. Experimental results are presented for two systems based on quartz crystals which provide stateof-the-art stability over a much wider range of averaging times than has been previously achieved. One system has achieved a factor of five...

A self-referenced VCO-based temperature sensor with reduced supply sensitivity is presented. The proposed sensor converts temperature information to frequency and then into digital bits. A novel sensing technique is proposed in which temperature information is acquired by evaluating the ratio of the output frequencies of two ring oscillators, designed to have different temperature sensitivities...

A system of nonlinear oscillators of an extended Van der Pol type was recently introduced [1] by the author. Under certain conditions the solutions of this system are attracted by the solutions of a nonlinear conservative system [1, 2], It has been proved in [2] that the latter system is integrable in the case of two oscillators. For three or more oscillators the question of integrability is op...

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We analyze seismic signals produced by explosion-quakes at Stromboli Volcano. We use standard nonlinear procedures to search a low-order effective dynamics. The dimension of the reconstructed phase space depends on the number of samples. Namely larger time lengths correspond to dynamical systems of different complexity. If we restrict the analysis to the signal associated directly to the source...

Allan Variance: Also known as short‐term stability, this is the measure of oscillator stability in the time domain. Commonly referred to as the Allan variance, it measures the RMS change in successive frequency measurements for short gate times (milliseconds to seconds) and is important in timing applications. It typically improves as the gate time increases until it becomes a measure of the me...

A frequency synthesis is a combination of electrical system elements that results in the generation of one or many frequencies from one or a few reference sources. The fine frequency resolution, low spurious signals, accuracy and stability are most important for these devices. The frequency synthesizers are an essential part of any modern communication system. They generate clock and oscillator...

The electronic excitations of naphthalene and a family of bridged naphthalene dimers are calculated and analyzed by using the Collective Electronic Oscillator method combined with the oblique Lanczos algorithm. All experimentally observed trends in absorption profiles and radiative lifetimes are reproduced. Each electronic excitation is linked to the corresponding real-space transition density ...