| With the rapid development in integrated electronic systems, the clock frequency has reached G Hz level with faster transmission speed of signals and data up and down time factors have been much steeper for the modern Integrated circuits. Such high integration density circuits with small and compact size have brought great challenges to a designer. Compared to the traditional circuit systems, the current high speed circuit is more complex because of more functions and multiple voltage islands. All these factors have brought a series of Power Integrity problems to the high speed circuit system and these problems are the current bottleneck for IC development. So how to suppress the noise in a power distribution network is now a research hotspot.This paper,firstly,introduces the basic principle of a power distribution network; focuses on the power ground plane for the basis; and introduces two methods of noise suppression: 1. addition of decoupling capacitor and 2. use of electromagnetic band gap(EBG) structure; by establishing a relevant model and the method of system simulation to study of the layout of the decoupling capacitor and the specific values in order to improve the power/ground plane for noise suppression effects, also using the impedance method to measure performance of the decoupling capacitor which reduces the Simultaneous Switching Noise.In relevance to the noise suppression performance of EBG structure, the new structure is proposed based on the discussed equivalence circuit of coplanar EBG structure and design method. In Combination with the CSRR resonance structure,a new structure with a good performance in noise suppression aspect is put forward which has been verified by various simulation and sample tests. The proposed structure has also been studied using the signal integrity analysis leading to a conclusion that differential line transmission signal could be adopted to minimize EBG structure damage for the return path’s impact on signal integrity. |
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