The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Date of Patent:
Jun. 28, 2005

Filed:

Aug. 12, 2003
Applicants:

Guang-nan Tzeng, Hsinchu, TW;

Tien Tzu Chen, Taipei, TW;

Yung-chih Chen, Pingtung, TW;

Inventors:

Guang-Nan Tzeng, Hsinchu, TW;

Tien Tzu Chen, Taipei, TW;

Yung-Chih Chen, Pingtung, TW;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F003/04 ; H03F003/45 ;
U.S. Cl.
CPC ...
Abstract

The DC-DC converter of the present invention sets the soft start function in the error amplifier. With soft start added, the error amplifier's output voltage will follow the slowly ascending soft start voltage when the DC-DC converter is enabled. Then the soft start looses control over the error amplifier when the soft start voltage exceeds the steady state value of the error amplifier's output voltage. And meanwhile, the amplifier's input will take over the control. By doing so, the present invention significantly eradicates or reduces jitters caused by the output voltage of the error amplifier and the DC-DC converter.


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