关键词: 电源分配网络;目标阻抗;去耦电容器

Abstract:

To solve the over design problem which is brought by the traditional target impedance in PDN design,a PDN design method based on an improved target impedance is proposed.What is different from the traditional target impedance,the proposed impedance is the combination of resistance and inductance and it shows as rising frequency-impedance curves.In the practical operation,the combination which uses the minimum decoupling capacitors (decaps) is selected as the best target impedance.A PDN design tool has been implemented in Matlab,and practice shows that compared with the method which use the traditional target impedance,the proposed method use less decaps and has a strong practicability.

Key words: PDN;target impedance;decoupling capacitor