Masters Theses


Viswa Pilla

Keywords and Phrases

Cable ESD CAT 5 CDE Ethernet


"Cable discharge events (CDE) typically occur when a charged cable is connected to an electronic device. Several CDE damages in Ethernet LAN and USB communication interface equipment are reported by the IC manufacturers. CDE differs from other types of ESD such as human body model (HBM), charged device model (CDM) and IEC 61000-4-2 mainly due to faster rise times, longer pulse widths and higher peak currents. Various factors such as cable geometries, charging and discharging mechanisms, and load conditions influence CDE. Several researchers have developed some measurement techniques to understand CDE waveforms. However, there is little information regarding its modeling and simulation.

This study mainly focuses on developing simulation models for Cable Discharge Events (CDE) in general and specific to Ethernet LAN interfaces. An overview of some of the most relevant publications is provided at first, to understand the current state-of-the-art. Further, the factors that influence CDE are explained in detail. Next, various CDE modeling and simulation approaches are compared and two modeling techniques to simulate some of the most important aspects of CDE are proposed. The first method mainly deals with the estimation of voltages on conductors during charging and discharging. The second method, a hybrid modeling technique, aims at simulating the CDE of an unshielded twisted pair (UTP) with reasonable accuracy and simulation time. The details of a simple CDE tester that was developed to validate the simulation model are explained. Several factors that affect CDE such as cable length, cable's height above a ground plane, discharge sequencing, presence of a vertical discharge plane etc. are analyzed using the proposed simulation techniques. At the end, all major simulation results are discussed and the scope of future work is also mentioned"--Abstract, page iii.


Pommerenke, David

Committee Member(s)

Fan, Jun, 1971-
Khilkevich, Victor


Electrical and Computer Engineering

Degree Name

M.S. in Electrical Engineering


Missouri University of Science and Technology

Publication Date



x, 64 pages

Note about bibliography

Includes bibliographical references (pages 62-63).


© 2014 Viswa Pilla, All rights reserved.

Document Type

Thesis - Open Access

File Type




Thesis Number

T 11000

Electronic OCLC #