Evaluating and choosing decoupling capacitors

Author

Davidson, Lincoln ; Fallah, Ahmad Mahin ; Nelson, Robert ; Rogers, David A.

Author_Institution

LLC, Analog Design, Fargo, ND, USA

Volume

1

fYear

2001

fDate

2001

Firstpage

448

Abstract

Noisy power busses in printed circuit boards can be a source of radiated emissions and can cause unreliable operation. Improper selection of decoupling capacitors can increase the impedance of the power bus and, as a result, cause an increase in its noise voltage. This paper describes a simple method for evaluating power busses and a procedure for selecting decoupling capacitors to minimize the noise on the system by lowering its output impedance

Keywords

capacitors; electric impedance measurement; electric noise measurement; electromagnetic interference; printed circuit design; voltage measurement; decoupling capacitors selection; noise minimisation; noise voltage increase; noise voltage measurement; noisy power busses; output impedance lowering; power bus impedance measurement; power busses; printed circuit boards; radiated emissions; unreliable operation; Capacitors; Circuit noise; Circuit testing; Frequency; Impedance measurement; Neodymium; Noise measurement; Power measurement; Power system reliability; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electromagnetic Compatibility, 2001. EMC. 2001 IEEE International Symposium on

Conference_Location

Montreal, Que.

Print_ISBN

0-7803-6569-0

Type

conf

DOI

10.1109/ISEMC.2001.950681

Filename

950681