关键词: PDN, 多芯片多输入, 分布式建模, 去耦

Abstract:

At the present stage more mature decoupling analyses of PDN aim mostly at the single chip and single input network, failing to meet the analysis requirements of the increasingly high-speed and highly integrated system. Based on the N-port network theory, this paper analyzes the principle of resistance increases for multi-power port PDN, introduces the new concept of multi-input impedance in order to catch the distributed characteristics of PDN current, and gives the decoupling method for complex PDN finally. The experimental results prove that the proposed decoupling scheme can reduce multi-input impedance of all the chips to below target impedance effectively to meet the requirements of the system 5% noise margin.

Key words: PDN, multi chip and multi input, distributed modeling, decoupling method