Distributed matched bypassing for board-level power distribution networks

Author

Novak, Istvan ; Noujeim, Leesa M. ; Cyr, Valerie St ; Biunno, Nicholas ; Patel, Atul ; Korony, George ; Ritter, Andrew

Author_Institution

Sun Microsystems Inc., Burlington, MA, USA

Volume

25

Issue

2

fYear

2002

fDate

5/1/2002 12:00:00 AM

Firstpage

230

Lastpage

243

Abstract

Power-distribution networks need to provide impedance response with specified shape/value over a wide frequency band. Bypass capacitors with different values, and capacitors and planes may create resonance peaks, unless the capacitor parameters are selected properly. Distributed matched bypassing (DMB) is suggested to create a smooth impedance profile. DMB requires components with Q≪1, which in turn requires user-defined ESR. Different options are shown to set (increase) the ESR of bypass capacitors. The concepts of bypass quality factor (BQF) and bypass resistor (BR) are introduced.

Keywords

Q-factor; capacitors; circuit resonance; impedance matching; power supply circuits; printed circuit design; board-level power distribution networks; bypass capacitors; bypass quality factor; bypass resistor; capacitor parameters; distributed matched bypassing; impedance profile; impedance response; resonance peaks; specified shape/value; user-defined ESR; Capacitance; Capacitors; Digital multimedia broadcasting; Frequency; Impedance; Inductance; Paramagnetic resonance; Power systems; Q factor; Sun;

fLanguage

English

Journal_Title

Advanced Packaging, IEEE Transactions on

Publisher

ieee

ISSN

1521-3323

Type

jour

DOI

10.1109/TADVP.2002.803265

Filename

1049634