نتایج جستجو برای: phase delay

تعداد نتایج: 719107  

2003
Yuichi Kurita Atsutoshi Ikeda Jun Ueda Yoshio Matsumoto Tsukasa Ogasawara

In this paper, a novel pointing device is proposed which utilizes the deformation of the fingerprint. When the fingertip is pressed and slid slightly on a rigid plate, a partial slip, called “incipient slip”, occurs on the contact surface. Since the deformation around the center of the contact surface is small, the center of the fingerprint can be detected during the incipient slip. The Group D...

2011
Chun-Yan Qi Izumi Masubuchi Shaosheng Zhou

In this paper, we consider the problem for singular systems with state delay. We mainly focus on the problems of absolute delay-dependent stability using the Lyapunov function method and give sufficient conditions in terms of linear matrix inequality (LMI). A numerical example is given to illustrate the application of the proposed method. References [1] Izumi Masubuchi, ∞ H control for descript...

2014
Olga Razskazovskaya Ivan B. Angelov Konstantin L. Vodopyanov Michael Trubetskov

Nowadays, dispersive mirrors are able to cover the wavelength range of 4.5 optical octaves and can be used from 220 nm up to 4500 nm. Various design approaches to dispersive mirrors in visible and near IR are briefly discussed. We consider in more detail two dispersive mirrors representing extreme cases. The first one is a mirror working in the range of 290−360 nm and providing group delay dis...

2005
Tomáš DOSTÁL

Analogue first, second and high-order all-pass active filters in the current mode, with constant group delay and magnitude responses, are presented in this paper. These filters are based on a modification of the multi-loop feedback canonical structures using signal flow graphs. Implementations by multi-output transconductors, namely classical OTAs and novel CDTAs are given.

2009
KAREL ZAPLATILEK

A lot of methods for analog filter group delay optimization have been developed. In the article an original approach to the evaluation of the optimization methods is presented. Our approach is based on the original representation of the optimization results in a polar space. In that space there are very interesting spirals indicating the optimization efficiency directly and clearly. This approa...

2001
B. Nauta

In this paper, a thorough analysis of the jitter behavior of a Delay Locked Loop (DLL) based clock multiplying architecture is presented. The noise sources that are included in the analysis are the noise of the delay elements, the reference jitter and the noise of the Phase Frequency Detector and Charge Pump combination. It is shown that the effect of all noise sources on the output timing jitt...

2007
H.-M. Heuck P. Neumayer M. Hagemann K. Witte T. Kühl

The influence of the dispersion of glass seams only relevant for femtosecond lasers with a pulse length below 100 fs. This commonly used approximation holds only for visible and IR light. For UV fs-laser Z. Bor stated out that due to the large dispersion in the UV regime fs-pulses with a duration of a few hundred femtoseconds are significantly affected in lenses by the group delay [1]. When a p...

2004
Rajesh M. Hegde Hema A. Murthy Venkata Ramana Rao Gadde

Feature extraction and selection for continuous speech recognition is a complex task. State of the art speech recognition systems use features that are derived by ignoring the Fourier transform phase. In our earlier studies we have shown the efficacy of The Modified Group Delay Feature (MODGDF) derived from the Fourier transform phase for phoneme, syllable and speaker recognition. In this paper...

2004
LUC THEVENAZ JEAN-PAUL PELLAUX

Highly accurate group delay measurements in long singlemode fibers were achieved over the full 1200-1600 nm spectral range by measuring phase shifts of a modulated lightwave. The high modulation frequency is shifted down to the kilohertz range using a second optical modulation at the fiber output end, so that low-frequency ultrasensitive detection and phase measurement can be performed with hig...

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