Summary
2019 Joint International Symposium on Electromagnetic Compatibility and Asia-Pacific International Symposium on Electromagnetic Compatibility, Sapporo
2019
Session Number:WedPM2Po
Session:
Number:WedPM2Po.2
Reduce Radiation of PCIe Gen3 / 4 Signal by Common Mode Filter Design
Lee Cheng-Hsien,
pp.-
Publication Date:2016/10/5
Online ISSN:2188-5079
DOI:10.34385/proc.58.WedPM2Po.2
Summary:
Common mode filter constructed by ground plane voiding had been researched and verified in this paper. EMI test results shown radiation magnitude is reduced at target frequency with designed common mode filter. SSC (Spread Spectrum Clocking) is extensively used for PCIe signal to reduce radiation magnitude. While, SSC will not always be allowed in some PCIe3 configurations. Practicable design of common mode filter is essential to reduce radiation magnitude when system turns off SSC. This paper develops method to design common mode filter in PCB. This method had been verified by EMI test of actual system.