Investigation of noise coupling from switching power supply to signal nets

Author

Wu, Songping ; Kam, Keong ; Pommerenke, David ; Cornelius, Bill ; Shi, Hao ; Herndon, Matthew ; Fan, Jun

Author_Institution

Dept. of Electr. & Comput., Missouri Univ. of Sci. & Technol., Rolla, MO, USA

fYear

2010

fDate

25-30 July 2010

Firstpage

79

Lastpage

84

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.

Keywords

coupled circuits; noise; nonlinear systems; printed circuits; switched mode power supplies; switching circuits; switching convertors; switching networks; hybrid nonlinear model; noise coupling mechanism; passive electromagnetic model; printed circuit board design; signal integrity; signal network; switched-mode power supply; switching current; switching power supply; switching voltage; synchronous buck converter circuit model; Couplings; Frequency domain analysis; Geometry; Integrated circuit modeling; Noise; Stripline; Switches;

fLanguage

English

Publisher

ieee

Conference_Titel

Electromagnetic Compatibility (EMC), 2010 IEEE International Symposium on

Conference_Location

Fort Lauderdale, FL

ISSN

2158-110X

Print_ISBN

978-1-4244-6305-3

Type

conf

DOI

10.1109/ISEMC.2010.5711251

Filename

5711251