Title :
A study of estimation of balance degree using CMRR mesurement for power distribution interconnection on printed circuit board
Author :
Shimazaki, Mutsumi ; Asai, Hiroki
Author_Institution :
Corp. Productivity Eng. Dept., Mitsubishi Electr. Corp., Tokyo, Japan
Abstract :
Common-mode currents through the DC power supply cable attached to small electronic device causes EMI (Electro-Magnetic Interference). When the primary factor of common-mode is corresponding to mismatch balance on the wiring, balance degree may be obtained from CMRR (Common Mode Rejection Ratio) of the printed circuit board in the equipment. We made some experiment boards, measured the CMRR and considered the relations with mismatching balance. As a result, it is confirmed that the CMRR shows the similar tendency to the balance degree, although we could not find the complete correlation between them. Further, the wiring structure with parallel narrow conductor plates was proved to suppress the common mode.
Keywords :
distribution networks; electromagnetic interference; power supply circuits; printed circuit interconnections; DC power supply cable; EMI; balance degree estimation; common mode rejection ratio; common-mode currents; conductor plates; electro-magnetic interference; electronic device; power distribution interconnection; printed circuit board; Conductors; Impedance matching; Ports (Computers); Power cables; Printed circuits; Scattering parameters; Transmission line measurements; CDF; CMRR; balance; board; cable;
Conference_Titel :
Electrical Design of Advanced Packaging and Systems Symposium (EDAPS), 2013 IEEE
Conference_Location :
Nara
Print_ISBN :
978-1-4799-2313-7
DOI :
10.1109/EDAPS.2013.6724406