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:
Aug. 30, 2011
Filed:
Feb. 16, 2009
Hung-liang Chou, Kaohsiung, TW;
Jia-min Shen, Kaohsiung, TW;
Chin-chang Wu, Kaohsiung, TW;
Li-hsiang Lai, Kaohsiung, TW;
Lung-chi Yang, Kaohsiung, TW;
Ya-tsung Feng, Kaohsiung, TW;
Hung-Liang Chou, Kaohsiung, TW;
Jia-Min Shen, Kaohsiung, TW;
Chin-Chang Wu, Kaohsiung, TW;
Li-Hsiang Lai, Kaohsiung, TW;
Lung-Chi Yang, Kaohsiung, TW;
Ya-Tsung Feng, Kaohsiung, TW;
Ablerex Electronics Co., Ltd., Hsintien,Taipei, TW;
Abstract
A ripple voltage suppression apparatus includes a DC/DC converter and a control circuit. The DC/DC converter has a power electronic switch. The control circuit has a voltage detector detecting a DC output voltage of the DC/DC converter, a ripple voltage suppression circuit receiving the detected DC output voltage to generate an AC control signal for controlling an AC component of a duty ratio of the power electronic switch, an output voltage regulation circuit receiving the detected DC output voltage to generate a DC control signal for controlling an DC component of a duty ratio, an adder adding the AC and DC control signals to form a combined control signal, and a PWM circuit converting the combined control signal into a PWM signal to control the power electronic switch. Only the DC output voltage of the DC/DC converter has to be detected for the control circuit.