利用有效去耦上升时间选择去耦电容的方法

doi:10.3969/j.issn.1001-2400.2018.04.009

Abstract

Abstract:

The traditional power distribution network design method is based on the frequency-domain target impedance, but this method ignores the transient characteristics of the power distribution network and current excitation, and can not represent the high frequency characteristics of the power distribution network accurately. Aiming at this problem, under the condition that the input current is in the triangular form, the critical rise time of the input current which needs to add decoupling capacitors and the effective decoupling rise time range of the capacitor are deduced. The relationship between the maximum voltage noise of the decoupling capacitor and the rise time and the relevant capacitance parameters is further investigated, and then the capacitor selection method based on the effective decoupling rise time is proposed. Compared with the frequency-domain decoupling method, the results of the decoupling design for 4 typical stimuli show that the number of capacitors can be reduced more than 31.6%.

Key words: power distribution networks , effective decoupling rise time, decoupling capacitor, integrated circuit

LIU Yang;XIA Jianqiang;CHU Xiuqin. Capacitor selection method based on the effective decoupling rise time[J].Journal of Xidian University, 2018, 45(4): 45-50+56.

References

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Capacitor selection method based on the effective decoupling rise time

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