DocumentCode :
1380597
Title :
Analysis of Common-Mode Noise for Weakly Coupled Differential Serpentine Delay Microstrip Line in High-Speed Digital Circuits
Author :
Shiue, Guang-Hwa ; Shiu, Jia-Hung ; Tsai, Yi-Chin ; Hsu, Che-Ming
Author_Institution :
Dept. of Electron. Eng., Chung Yuan Christian Univ., Taoyuan, Taiwan
Volume :
54
Issue :
3
fYear :
2012
fDate :
6/1/2012 12:00:00 AM
Firstpage :
655
Lastpage :
666
Abstract :
This study investigates the mechanisms of generation of the transient transmission common-mode noise in a differential serpentine delay line under weak coupling condition. The generation mechanism and the frequency of common-mode noise are investigated with reference to the time-domain transmission waveform and the differential-to-common mode conversion mixed-mode S-parameters using the circuit solver HSPICE and 3-D full-wave simulator HFSS, respectively. The generation mechanisms of common-mode noise include length mismatch between vertical-turn-coupled traces, the length effect of parallel-coupled traces, and the crosstalk noise effect. Moreover, a graphical method based on wave tracing is presented to illustrate the cancellation mechanism of near-end common-mode noise for the symmetrical differential serpentine delay line. Some practical, commonly used layout routings of the differential serpentine delay line are investigated. Some important design guidelines are provided to help design differential serpentine delay line with low common-mode noise. A comparison between simulated and measured results validates the equivalent circuit model and analytical approach.
Keywords :
S-parameters; SPICE; digital integrated circuits; high-speed integrated circuits; microstrip lines; network analysis; time-domain analysis; 3D full-wave simulator; HFSS; HSPICE; cancellation mechanism; circuit solver; crosstalk noise effect; differential serpentine delay line; differential-to-common mode conversion mixed-mode S-parameters; equivalent circuit model; high-speed digital circuits; length mismatch; near-end common-mode noise; parallel-coupled traces; symmetrical differential serpentine delay line; time-domain transmission waveform; transient transmission common-mode noise analysis; vertical-turn-coupled traces; wave tracing-based graphical method; weak coupling condition; weakly coupled differential serpentine delay microstrip line; Crosstalk; Delay; Delay lines; Integrated circuit modeling; Microstrip; Noise; Transient analysis; Common-mode noise; crosstalk noise; differential serpentine delay line; differential-to-common mode conversion; length mismatch; mixed S-parameter;
fLanguage :
English
Journal_Title :
Electromagnetic Compatibility, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9375
Type :
jour
DOI :
10.1109/TEMC.2011.2173765
Filename :
6085608
Link To Document :
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