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:
Mar. 06, 2012
Filed:
Mar. 25, 2009
Applicants:
Matthew Man Ho Ku, Irvine, CA (US);
Run Qin Tan, Shenzhen, CN;
Inventors:
Matthew Man Ho Ku, Irvine, CA (US);
Run Qin Tan, Shenzhen, CN;
Assignee:
Evergreen Micro Devices Co., Ltd., Shenzhen, CN;
Primary Examiner:
Int. Cl.
CPC ...
G05F 5/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A controller for reducing the harmonics contents in the AC-to-DC converter that is capable of minimizing THD due to crossover distortion. The controller can approximate the shape of the current running through boost inductor to the sinusoidal waveform of the rectified line input voltage and in the meantime to keep the valley of rectified sinusoidal waveform line voltage close to local ground value. The controller can be used in a transition mode power factor correction device suitable for a wide range of AC line input voltage and output loading application.