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.
Patent No.:
Date of Patent:
Dec. 20, 2005
Filed:
Aug. 01, 2003
Hsin-kai Huang, Taipei, TW;
Jin-kae Jang, Taichung, TW;
Yi-ming Chang, Taipei, TW;
Wen-jong Tu, Ilan, TW;
Hsin-Kai Huang, Taipei, TW;
Jin-Kae Jang, Taichung, TW;
Yi-Ming Chang, Taipei, TW;
Wen-Jong Tu, Ilan, TW;
Primax Electronics Ltd., Taipei, TW;
Abstract
A voltage regulator for use in a charging device of a portable electronic apparatus is disclosed. The voltage regulator includes a transformer having a primary winding and a secondary winding, a switch circuit being controlled via a control end thereof so as to result in a variable current on the primary winding, a rectification circuit electrically connected to the secondary winding, and proceeding a charging operation in response to an induced current, and a micro-controller electrically connected to the switch circuit and generating a pulse width modulation (PWM) signal to the control end in response to the charging operation. In addition, a method for operating a voltage regulator is also disclosed.