TY - GEN
T1 - Electromagnetic interference of switching mode power regulator with chaotic frequency modulation
AU - Wong, H.
AU - Chan, Y.
AU - Ma, S. W.
N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to <a href="mailto:[email protected]">[email protected]</a>.
PY - 2002
Y1 - 2002
N2 - In this work, we propose an improved switching scheme (called chaotic frequency modulation (CFM)) for switched-mode power supplies to suppress the electromagnetic interference (EMI) noise source. The basic principle of CFM is to use a chaotic signal to modulate the switching signal such that the harmonics of noise power is distributed evenly over the whole spectrum instead of concentrated at the switching frequency. When compared with the conventional pulse width modulation (PWM) scheme, significant improvements in both conducted and radiated EMI noise levels were found with CFM method. For conducted EMI, the peak noise level was reduced by 25 dB. For radiated EMI, we found that the noise was found mainly in the frequency range of 30 MHz to 230 MHz and the CFM scheme would help to reduce the peak noise level in this frequency range by 22 dB. © 2002 IEEE.
AB - In this work, we propose an improved switching scheme (called chaotic frequency modulation (CFM)) for switched-mode power supplies to suppress the electromagnetic interference (EMI) noise source. The basic principle of CFM is to use a chaotic signal to modulate the switching signal such that the harmonics of noise power is distributed evenly over the whole spectrum instead of concentrated at the switching frequency. When compared with the conventional pulse width modulation (PWM) scheme, significant improvements in both conducted and radiated EMI noise levels were found with CFM method. For conducted EMI, the peak noise level was reduced by 25 dB. For radiated EMI, we found that the noise was found mainly in the frequency range of 30 MHz to 230 MHz and the CFM scheme would help to reduce the peak noise level in this frequency range by 22 dB. © 2002 IEEE.
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U2 - 10.1109/MIEL.2002.1003323
DO - 10.1109/MIEL.2002.1003323
M3 - RGC 32 - Refereed conference paper (with host publication)
SN - 0780372352
SN - 9780780372351
VL - 2
T3 - 2002 23rd International Conference on Microelectronics, MIEL 2002 - Proceedings
SP - 577
EP - 580
BT - 2002 23rd International Conference on Microelectronics, MIEL 2002 - Proceedings
PB - IEEE Computer Society
T2 - 2002 23rd International Conference on Microelectronics, MIEL 2002
Y2 - 12 May 2002 through 15 May 2002
ER -