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Improved Full Bridge Converter with Low peak voltage on Rectifier Diodes

Journal of Donghua University(English Edition) 2015年第1期32卷 62-67页

作者：薛开昶范鹏林君周逢道刘长胜 College of Instrumentation and Electrical Engineering Jilin University

To suppress peak voltage on rectifier diodes in a full bridge( FB) converter,the mechanism of peak voltage was analyzed and an improved FB converter was proposed. One reason for peak voltage is the resonance of the transformer's leakage inductance and the rectifier diodes' junction capacitances. The other reason is that the fast reverse recovery current of the rectifier diodes flows through the transformer's leakage inductance. An H bridge composed of four diodes,an auxiliary inductance, and a clamping winding were adopted in the proposed converter,and peak voltage was suppressed by varying the equivalent inductance, principally in different operating modes. Experimental results demonstrate that the peak voltage of rectifier diodes decreases by 43%,the auxiliary circuit does not lead to additional loss, and the rising rate, resonant frequency,and amplitude of the rectifier diodes' voltage *** voltage and electromagnetic interference( EMI) of rectifier diodes are suppressed.

关键词： full bridge(FB) converter rectifier diodes peak voltage efficiency electromagnetic interference(EMI)

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FDTD technique based crosstalk analysis of bundled SWCNT interconnects

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Journal of Semiconductors 2015年第5期36卷 90-98页

作者： Yograj Singh Duksh Brajesh Kumar Kaushik Rajendra P.Agarwal Department of Electronics and Instrumentation Engineering Mahatma Jyotiba Phule Rohilkhand University Department of Electronics and Communication Engineering Indian Institute of Technology Shobhit University

The equivalent electrical circuit model of a bundled single-walled carbon nanotube based distributed RLC interconnects is employed for the crosstalk analysis. The accurate time domain analysis and crosstalk effect in the VLSI interconnect has emerged as an essential design criteria. This paper presents a brief description of the numerical method based finite difference time domain （FDTD） technique that is intended for estimation of voltages and currents on coupled transmission lines. For the FDTD implementation, the stability of the proposed model is strictly restricted by the Courant condition. This method is used for the estimation of crosstalk induced propagation delay and peak voltage in lossy RLC interconnects. Both functional and dynamic crosstalk effects are analyzed in the coupled transmission line. The effect of line resistance on crosstalk induced delay, and peak voltage under dynamic and functional crosstalk is also evaluated. The FDTD analysis and the SPICE simulations are carried out at 32 nm technology node for the global interconnects. It is observed that the analytical results obtained using the FDTD technique are in good agreement with the SPICE simulation results. The crosstalk induced delay, propagation delay, and peak voltage obtained using the FDTD technique shows average errors of 4.9%, 3.4% and 0.46%, respectively, in comparison to SPICE.

关键词： FDTD SWCNT bundle interconnects crosstalk delay peak voltage coupled transmission lines

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