Results 251 to 260 of about 508,717 (304)
Some of the next articles are maybe not open access.
Multivariable Frequency Domain Stability Criteria
IFAC Proceedings Volumes, 1983Abstract In this paper we address the problem of determining the least conservative stability criteria for the stability of non-linear multivariable feedback systems based upon a characterisation of the non-linearity and eigenloci plots of the linear operator or its normal approximate.
C.J. Harris, R.K. Husband
openaire +1 more source
Optical-RF frequency stability transformer
Optics Letters, 2011An optical technique based on stability transfer among modes of a monolithic optical microresonator is proposed for long term frequency stabilization of a radio frequency (RF) oscillator. We show that locking the frequency difference of two microresonator modes with dissimilar sensitivity to an applied forcing function to a master RF oscillator ...
A B, Matsko +4 more
openaire +2 more sources
Frequency-stabilized 1 GHz turnkey frequency comb
Laser Congress 2019 (ASSL, LAC, LS&C), 2019We present the characterization and optical stabilization of a turnkey 1 GHz femtosecond laser at 1560 nm, opening new possibilities for metrology and dual-comb spectroscopy with improved SNR and faster acquisition rates.
Alexander J. Lind +6 more
openaire +1 more source
Center-Frequency-Stabilized Frequency-Modulation System
Proceedings of the IRE, 1947A system comparing the phase between two frequencies in a balanced phase detector utilizes the output to maintain synchronization between two oscillators. The phase detector operates between ±90 degrees. By dividing the frequency of a frequency-modulated oscillator, the frequency swing is reduced to less than ±24 degrees.
E.M. Ostlund, A.R. Vallarino, M. Silver
openaire +1 more source
Stability in phonational frequency range
Journal of Communication Disorders, 1989The purpose of the present study was to investigate the stability of total phonational frequency range, and the stability of the elements from which it is calculated--lowest fundamental frequency and highest fundamental frequency--both within a single day and over a prolonged period.
openaire +2 more sources
Angle, Voltage, and Frequency Stability
2008info:eu-repo/semantics ...
Cañizares, Claudio +2 more
openaire +3 more sources
Variable-Frequency Bridge-Type Frequency-Stabilized Oscillators
Proceedings of the IRE, 1943Results are given of a theoretical and experimental investigation into two types of bridge-stabilized oscillators incorporating a thermal device for amplitude control. One circuit employs only resistances and capacitances in the frequency-determining network and consequently is useful for low-frequency operation.
W.G. Shepherd, R.O. Wise
openaire +1 more source
Oscillator Frequency Stability
1978The term frequency stability is a generic term which means a variety of things to different people depending on their individual interests. In its broadest concept, it means the degree of constancy of the frequency of an oscillator under a particular set of conditions.
openaire +1 more source
Characterization of frequency stability: frequency-domain estimation of stability measures
Proceedings of the IEEE, 1991The author focuses on the frequency domain approach, which provides a complete characterization of frequency. The standard characterization of frequency stability in the frequency domain is the spectral density function (SDF). The author describes SDFs that model sampled frequency stability data and that are related to the SDFs of the standard ...
openaire +1 more source
Frequency dependence and stability
Mathematical Biosciences, 1976Abstract The use of difference equations is suggested for simulating frequency-dependent changes in gene frequencies. Our model shows a good fit to published cases of populations in which gene frequencies reached stable equilibrium. However, in the same deterministic model, slight changes in the value of some parameters can lead to cyclic or chaotic ...
Raveh, Adi, Ritte, Uzi
openaire +2 more sources