نتایج جستجو برای: locked loop

تعداد نتایج: 142892  

2005
Linda Milor John Cressler Russell Callen David Keezer

iii ACKNOWLEDGEMENTS I would like to express my sincere gratitude and appreciation to everyone who has helped to make this thesis possible. I would like to deliver my special thanks to my wife and my parents for their love, support, and patience. My deep appreciation also goes to Alfred Andrew for their time and valuable suggestions. Finally, I owe gratitude to all of my friends and colleagues ...

2010
J. T. C. Schwabedal A. Pikovsky

An effective dynamical description of a general class of stochastic phase oscillators is presented. For this, the effective phase velocity is defined either by the stochastic phase oscillators invariant probability density or its first passage times. Using the first approach the effective phase exhibits the correct frequency and invariant distribution density, whereas the second approach models...

Journal: :J. Electrical and Computer Engineering 2011
Ahmed Ragab Yang Liu Kangmin Hu Patrick Chiang Samuel Palermo

High-speed links which employ source synchronous clocking architectures have the ability to track correlated jitter between clock and data channels up to high frequencies. However, system timing margins are degraded by channel skew between clock and data signals and high-frequency loss. This paper describes how these key channel effects impact the jitter performance and influence the clocking a...

Journal: :IEEE Trans. on Circuits and Systems 2007
Chi-Nan Chuang Shen-Iuan Liu

A 0.5–5 GHz wide-range multiphase delay-locked loop (MDLL) with a calibrated charge pump is presented. A multiperiod-locked technique is used to enhance the input frequency range of a MDLL and avoid the harmonic-locked problem. The charge pump current is also calibrated to reduce the static phase error. This MDLL has been fabricated in 0.13m CMOS process. The measured root-mean-square and peak-...

Journal: :Journal of Low Power Electronics and Applications 2019

Journal: :IEICE Transactions 2008
Ching-Yuan Yang Chih-Hsiang Chang Wen-Ger Wong

A high-speed triangular-modulated spread-spectrum clock generator using a fractional phase-locked loop is presented. The fractional division is implemented by a nested fractional topology, which is constructed from a dual-modulus divide-by-(N–1/16)/N divider to divide the VCO outputs as a first division period and a fractional control circuit to establish a second division period to cause the o...

2006
DIARY R. SULAIMAN

This work concerns with the design and analysis of phase locked loops (PLLs). In the last decade a lot of works have been done about the analysis of PLLs. The phase locked loops are analyzed briefly, second order, third order, and fourth order. In practically the design of 1.3 GHz, 1.9V second order PLL is considered. SPICE simulation program results confirm the theory. Key-Words: Phase Locked ...

Journal: :IEE Proceedings - Circuits, Devices and Systems 1997

2010
D. Richard Brown Yizheng Liao Neil Fox

This paper presents a low-complexity real-time single-tone phase and frequency estimation technique based on zero-crossing detection and linear regression. The proposed zerocrossing phase and frequency estimator fills a gap between lowcomplexity phase locked loop estimation and high-performance maximum likelihood estimation. Similar to a phase locked loop, the zero-crossing phase and frequency ...

2011
MILAN STORK

Frequency synthesis is one of the most important and most actively researched subjects in the field of VLSI mixed-signal circuit design. Among the existing techniques in this area, phase locked loop fractional architecture is a widely used one for generating frequencies which are not integer multiple of the input reference frequency. Flying-Adder architecture is an emerging technique which is b...

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