Investigation of Noise Coupling from Switching Power Supply to Signal Nets

Abstract

Noise coupled from switched-mode power supply to signal nets can cause severe signal integrity problems because of the existence of fast switching voltages and currents in the circuit. In this paper, noise coupling mechanism from a synchronous buck converter to a nearby signal trace is studied using a hybrid non-linear model, which combines the synchronous buck converter circuit model and the passive electromagnetic model of the PCB coupling. General design guidelines to mitigate the noise coupling in practical printed circuit board (PCB) designs are provided based on the modeling results.

Meeting Name

IEEE International Symposium on Electromagnetic Compatibility (2010: Jul. 25-30, Fort Lauderdale, FL)

Department(s)

Electrical and Computer Engineering

Research Center/Lab(s)

Electromagnetic Compatibility (EMC) Laboratory

Keywords and Phrases

Design Guidelines; Electromagnetic Models; Fast Switching; Modeling Results; Noise Coupling; Non-linear Model; Printed Circuit Board Designs; Signal Traces; Signal-integrity Problems; Switched Mode Power Supplies; Switching Power Supplies; Synchronous Buck Converter; Coupled Circuits; DC-DC Converters; Electric Power Supplies to Apparatus; Electromagnetic Compatibility; Electromagnetism; Electronic Equipment Manufacture; Power Electronics; Printed Circuit Design; Printed Circuit Boards

International Standard Book Number (ISBN)

978-1424463053

International Standard Serial Number (ISSN)

2158-110X

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2010 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Jul 2010

Link to Full Text

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