Switching power supply capable of reducing low-frequency...

Details Switching power supply capable of reducing low-frequency... Switching power supply capable of reducing low-frequency...

2006-12-04

2009-06-30

Patel, Rajnikant B (Department: 2838)

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

C363S021120, C307S051000

Reexamination Certificate

active

07554825

ABSTRACT:
The invention discloses a switching power supply capable of reducing a low-frequency secondary-side common-mode voltage. The power supply mainly has two common-mode filtering circuit devices to prevent an AC voltage and an AC current from coupling to a secondary side of a transformer. Thus, the electrical safety and the quality in use of the associated electronic apparatus can be enhanced, a potential difference between the electronic apparatus and the ground may be greatly reduced, and an AC hum of a speaker coupled to an output of the power supply may be reduced or even eliminated.

REFERENCES:
patent: 6867575 (2005-03-01), Jacob D'Cunha

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