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:
Jan. 11, 2011
Filed:
Jan. 30, 2008
Chang-chun Liu, Shenzhen, CN;
Xiao-lin Gan, Shenzhen, CN;
Yu-kuang Ho, Taipei Hsien, TW;
Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Shenzhen, Guangdong Province, CN;
Hon Hai Precision Industry co., Ltd., Tu-Cheng, Taipei Hsien, TW;
Abstract
A charging circuit of a portable device includes a switch circuit having an input connected to a storage battery of the portable device for triggering the storage battery to supply power to an electronic device, a reference voltage circuit, a regulating circuit, a filter circuit filtering voltage signals from the storage battery, a collecting circuit, a comparator circuit, a rectangular generator, an integral circuit, and a driving circuit. The reference voltage circuit and the collecting circuit respectively output a reference voltage signal and a collecting voltage signal to the comparator circuit. The rectangular wave generator outputs a rectangular wave to the integral circuit. The integral circuit outputs a triangle wave signal to the driving circuit. The driving circuit outputs a pulse width modulation (PWM) signal to drive the regulating circuit to charge the electronic device.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile