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An Adaptive-Bandwidth CMOS PLL with Low Jitter and a Wide Tuning Range 被引量:6
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作者 宋颖 王源 +3 位作者 贾松 李宏义 赵宝瑛 吉利久 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2008年第5期908-912,共5页
This paper presents a novel adaptive-bandwidth charge pump PLL with low jitter and a wide tuning range. With an adaptive bandwidth,the proposed PLL can scale its loop dynamics proportional to the output frequency and ... This paper presents a novel adaptive-bandwidth charge pump PLL with low jitter and a wide tuning range. With an adaptive bandwidth,the proposed PLL can scale its loop dynamics proportional to the output frequency and maintain optimal performance over its entire output range. In order to improve the jitter performance of the PLL,a matching tech- nique is employed in the charge pump,and a voltage-to-voltage converter is used to achieve a low gain VCO. The experimental chip was fabricated in a 0. 35μm CMOS process. The measured results show that the PLL has perfect jitter performance within its operating range from 200MHz to 1.1GHz. 展开更多
关键词 PLL adaptive bandwidth low jitter wide tuning range
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Kernel Quantile Estimator with ICI Adaptive Bandwidth Selection Technique
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作者 Jie Yu FAN Man Lai TANG Mao Zai TIAN 《Acta Mathematica Sinica,English Series》 SCIE CSCD 2014年第4期710-722,共13页
In this article, we consider a class of kernel quantile estimators which is the linear combi- nation of order statistics. This class of kernel quantile estimators can be regarded as an extension of some existing estim... In this article, we consider a class of kernel quantile estimators which is the linear combi- nation of order statistics. This class of kernel quantile estimators can be regarded as an extension of some existing estimators. The exact mean square error expression for this class of estimators will be provided when data are uniformly distributed. The implementation of these estimators depends mostly on the bandwidth selection. We then develop an adaptive method for bandwidth selection based on the intersection confidence intervals (ICI) principle. Monte Carlo studies demonstrate that our proposed approach is comparatively remarkable. We illustrate our method with a real data set. 展开更多
关键词 adaptive bandwidth selection ICI principle kernel estimator QUANTILES
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Bandwidth adaption for kernel particle filter 被引量:1
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作者 Fu Li Guangming Shi Fei Qi Li Zhang 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2011年第2期340-346,共7页
A novel particle filter bandwidth adaption for kernel particle filter (BAKPF) is proposed. Selection of the kernel bandwidth is a critical issue in kernel density estimation (KDE). The plug-in method is adopted to... A novel particle filter bandwidth adaption for kernel particle filter (BAKPF) is proposed. Selection of the kernel bandwidth is a critical issue in kernel density estimation (KDE). The plug-in method is adopted to get the global fixed bandwidth by optimizing the asymptotic mean integrated squared error (AMISE) firstly. Then, particle-driven bandwidth selection is invoked in the KDE. To get a more effective allocation of the particles, the KDE with adap- tive bandwidth in the BAKPF is used to approximate the posterior probability density function (PDF) by moving particles toward the posterior. A closed-form expression of the true distribution is given. The simulation results show that the proposed BAKPF performs better than the standard particle filter (PF), unscented particle filter (UPF) and the kernel particle filter (KPF) both in efficiency and estimation precision. 展开更多
关键词 kernel density estimation adaptive bandwidth kernel particle filter.
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Adaptive linear active disturbance-rejection control strategy reduces the impulse current of compressed air energy storage connected to the grid
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作者 Jianhui Meng Yaxin Sun Zili Zhang 《Global Energy Interconnection》 EI 2024年第5期577-589,共13页
The merits of compressed air energy storage(CAES)include large power generation capacity,long service life,and environmental safety.When a CAES plant is switched to the grid-connected mode and participates in grid reg... The merits of compressed air energy storage(CAES)include large power generation capacity,long service life,and environmental safety.When a CAES plant is switched to the grid-connected mode and participates in grid regulation,using the traditional control mode with low accuracy can result in excess grid-connected impulse current and junction voltage.This occurs because the CAES output voltage does not match the frequency,amplitude,and phase of the power grid voltage.Therefore,an adaptive linear active disturbance-rejection control(A-LADRC)strategy was proposed.Based on the LADRC strategy,which is more accurate than the traditional proportional integral controller,the proposed controller is enhanced to allow adaptive adjustment of bandwidth parameters,resulting in improved accuracy and response speed.The problem of large impulse current when CAES is switched to the grid-connected mode is addressed,and the frequency fluctuation is reduced.Finally,the effectiveness of the proposed strategy in reducing the impact of CAES on the grid connection was verified using a hardware-in-the-loop simulation platform.The influence of the k value in the adaptive-adjustment formula on the A-LADRC was analyzed through simulation.The anti-interference performance of the control was verified by increasing and decreasing the load during the presynchronization process. 展开更多
关键词 Compressed air energy storage Linear active disturbance-rejection control Smooth grid connection Impulse current adaptive adjustment of bandwidth parameters
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Jitter Reduced Self Biased PLLs—A Systematic Simulation Study
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作者 J. Dhurga Devi 《Circuits and Systems》 2016年第5期533-542,共10页
The self biased Phase Locked Loop (PLL) has become a default choice for clock generation in many microprocessors. In today’s scenario, the processor cores are made to operate at rapidly varying combinations of clock ... The self biased Phase Locked Loop (PLL) has become a default choice for clock generation in many microprocessors. In today’s scenario, the processor cores are made to operate at rapidly varying combinations of clock frequencies and very low supply voltages. Though the traditional self biased PLL is still being widely used with hardly any modification, it is becoming imperative to take a relook at the design aspects of these PLLs with respect to their jitter performance. This paper presents a systematic simulation study of designing the self biased PLL with the goal of reducing jitter. It further shows that if the self biased PLL is adapted into a dual loop scheme in a systematic manner, a significant jitter improvement can be obtained. Detailed simulations carried out in 0.18 μm CMOS technology indicate a reduction of 56% or more in jitter for the systematically designed dual loop scheme in comparison to the jitter reduced traditional self biased PLL. 展开更多
关键词 JITTER Dual Loop PLL Self Biased PLL adaptive bandwidth PLL
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