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. 06, 2011
Filed:
Aug. 08, 2008
Chih-chang Chang, Hsinchu, TW;
Chao-tung Fan-chiang, Hsinchu, TW;
Chih-Chang Chang, Hsinchu, TW;
Chao-Tung Fan-Chiang, Hsinchu, TW;
Ampower Technology Co., Ltd., Jhongli, Taoyuan County, TW;
Abstract
An inverter circuit () includes a transformer (T) including a primary winding and a secondary winding including a high voltage terminal, a first copper foil (P), a power stage circuit () electrically connected to the primary winding, a detection circuit () including a second copper foil (P) and an impedance (Z), a protection circuit () outputting a protection signal, and a pulse width modulation controller () controlling output of the power stage circuit according to the protection signal. The second copper foil and the first copper foil are separated. An equivalent capacitor is formed between the second copper foil and the first copper foil, detecting voltage output from the high voltage terminal. The impedance is electrically connected between the second copper foil and ground, dividing a voltage detected by the equivalent capacitor.