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Study on the ESD EMP Effects and Preventing Techniques of CPLD System

Author: DaiYanLing
Tutor: XuXiaoYing
School: Wuhan University of Technology
Course: Physics
Keywords: Electrostatic discharge Electromagnetic Pulse CPLD system Effect Experiment Protection and strengthening
CLC: O441.4
Type: Master's thesis
Year: 2010
Downloads: 82
Quote: 0
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Abstract


With electronics, microelectronics applications technology, electrostatic discharge damage electronic devices and systems become increasingly serious and potentially damage and difficult to control. In this paper, the CPLD -based control system was composed of electromagnetic pulse effects, experiments and ESD protection and strengthening of research, the main research contents are as follows : In the analysis of domestic electronic systems on electrostatic discharge interference and destruction pathway , electrostatic discharge protection means the research status and problems , based on the theoretical analysis of the characteristics of electrostatic discharge electromagnetic pulse , summed up system due to interference caused by electrostatic discharge main reasons : Electrostatic discharge current to flow directly into the circuit and interference circuit ; through the circuit stray capacitance to form a good conduction path for ESD current coupled into the circuit to cause interference to the system ; electrostatic discharge current between adjacent circuits with capacitive and inductive coupling into the circuit in the transmission process ; electrostatic discharge current flow through the chassis produce interference circuit ground potential difference ; chassis and secondary discharge between the circuit causing malfunction of the circuit ; interaction between interconnected devices and so on. Designed for electrostatic discharge electromagnetic pulse effects test CPLD system, combined with IEC61000-4-2 standard electrostatic discharge immunity test test platform , the application of indirect discharge mode radiation effects on the system has been obtained by experiments failure phenomenon, the threshold voltage of the system , and the analysis of the system under the action of electromagnetic pulse ESD failure reason . Analysis of the electrostatic discharge electromagnetic pulse interference mechanism of the system , the system summarizes the CPLD ESD immunity electromagnetic pulse method : grounding techniques , shielding technology , lap technology , varistors , TVS tube , integrated ESD protection devices. Based on the experiments in effect , CPLD system with A / D conversion error module , the system was reinforced experimental study , by experimental tests and comparative analysis of several effective ESD protection reinforcement method . Finally , summed up the future direction of electrostatic discharge protection Positioning : Through software forecast for electrostatic discharge interference prevention and analysis.

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CLC: > Mathematical sciences and chemical > Physics > Electromagnetics,electrodynamics > Electricity and Magnetism > Electromagnetic waves and electromagnetic fields
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