Title :
Common Mode Radiation of a Printed Circuit Board with Embedded Decoupling Capacitor Excited by IC´s Shoot-Through Current
Author :
Sudo, Toshio ; Ichijo, Seiju ; Kushihira, Takanobu ; Yamamoto, Takuya ; Yamazaki, Kazuhiro
Author_Institution :
Corporate Manuf. Eng. Center, Toshiba Corp., Yokohama
Abstract :
Electromagnetic radiations of power bus with embedded decoupling capacitor composed of different insulator thicknesses were investigated for two case: with on-board global capacitors and without them. In order to distinguish the common mode radiation of the power bus due to shoot-through current from normal mode radiation, two different lengths of signal traces were compared. It has been proved that radiated emission due to shoot-through current was reduced over the wide frequency range by the PCBs with thinner insulators without on-board global capacitors, and was reduced in the limited frequency range by the PCB with relatively thick insulator and on-board global capacitors
Keywords :
capacitors; electromagnetic waves; insulators; printed circuits; common mode radiation; embedded decoupling capacitor; power bus; printed circuit board; radiated emission; shoot-through current; CMOS logic circuits; Capacitors; Dielectrics and electrical insulation; Electromagnetic interference; Electromagnetic radiation; Impedance; Manufacturing; Power supplies; Printed circuits; Voltage fluctuations;
Conference_Titel :
Electronics Systemintegration Technology Conference, 2006. 1st
Print_ISBN :
1-4244-0552-1
Electronic_ISBN :
1-4244-0553-x
DOI :
10.1109/ESTC.2006.279980
