Power supply apparatus for attenuating noise

Details Power supply apparatus for attenuating noise Power supply apparatus for attenuating noise

2007-10-16

2010-10-19

Sterrett, Jeffrey L (Department: 2838)

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

C363S016000, C363S037000, C363S041000, C363S048000

Reexamination Certificate

active

07817449

ABSTRACT:
A power supply to improve an EMI characteristic and an electronic device having the power supply. The power supply includes a power converter to convert an alternating current (AC) power applied from outside to a direct current (DC) power, a ground portion to supply a ground power to the power converter and a noise attenuator to reduce noise by blocking a harmonic current generated by a driving of the power converter from passing through the ground portion. Accordingly, the stable ground power can be supplied to the internal elements by avoiding the potential change of the ground power and the noise caused by the flow of the harmonic current can be reduced by shortening the harmonic current path. Therefore, the EMI characteristic can be improved.

REFERENCES:
patent: 5757628 (1998-05-01), Kamata
patent: 6765811 (2004-07-01), Chang
patent: 6775157 (2004-08-01), Honda
patent: 6781444 (2004-08-01), Pelly
patent: 6847530 (2005-01-01), James
patent: 2003/0128558 (2003-07-01), Takahashi et al.
patent: 2004/0223350 (2004-11-01), James

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