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Abstract-In this paper, a new method is proposed to estimate the simultaneous switching noise (SSN) directly from the power delivery network (PDN) frequency-domain impedance in order to reduce the time-domain simulation of SSN and computational burden, which is based on the periodic characteristics of the switching current and the SSN produced by one current pulse. The frequency-domain impedance is approximated with several single resonance circuits, which can capture the resonance characteristics of the PDN. The parameters of each resonance circuit are calculated with the rational function. It is also found that the SSN can be suppressed through adjusting the resonant frequencies and the period of switching current. Compared with the single resonance lumped circuit model and multi-resonance distributed circuit model, the performance of the new method for estimating the SSN is verified, which is more accurate than the target impedance method.

Abstract-In this paper, a new method is proposed to calculate the simultaneous switching noise (SSN) in order to reduce the complexity of SSN circuit models and computational burden, which is based on the rational function (RF) in time domain. The time-domain impedance function of a power delivery network (PDN) is calculated by approximating the impedance frequency response of a PDN with a rational function, and the SSN is calculated based on switching current characteristics. It is also found that the SSN can be suppressed through adjusting the period of time-domain impedance function and switching current. Compared with the simulated results and measured results, the performance of the new method for calculating and suppressing the SSN is verified, and the simulation time of SSN is reduced effectively.

The crosstalk in electromagnetic band-gap (EBG) structure is investigated in this paper. It is found that the crosstalk noise in EBG structure is worse than that in reference plane. More energy would be coupled to the victim line by the slots of EBG structure, which seriously affects the signal quality with high date rate, the near-end and far-end crosstalk coupling noise are increased by 10dB and 20dB respectively. It is clearly shown that the crosstalk noise decreases with the space increasing between traces, but it is still larger than that of the reference plane with one time line width. A useful method for reducing the crosstalk coupling noise is presented in this paper.Index Terms -Electromagnetic band-gap, high-impedance plane, printed circuit board (PCB), coupling, crosstalk, nonideal return path.

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