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:
May. 20, 2008
Filed:
Jun. 08, 2005
Footshen Wong, Singapore, SG;
Vlad Popescu-stanesti, San Jose, CA (US);
Mingkwong Han, Singapore, SG;
Xiachua Hou, Shanghai, CN;
Chunhsi Lin, Yi-Lan Shien, TW;
Footshen Wong, Singapore, SG;
Vlad Popescu-Stanesti, San Jose, CA (US);
Mingkwong Han, Singapore, SG;
Xiachua Hou, Shanghai, CN;
ChunHsi Lin, Yi-Lan Shien, TW;
02Micro International Limited, Grand Cayman, KY;
Abstract
A circuit according to the present invention is used for driving a photoflash diode and comprises a current sink, a feedback circuit, and a DC-DC converter. The current sink is coupled to the photoflash diode for controlling the current through the photoflash diode. The feedback circuit receives a feedback signal indicative of the electrical condition of said first current regulator. The DC-DC converter is coupled to an external power source and the feedback circuit for powering the photoflash diode so as to control the electrical condition of the current sink to a predetermined value.