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:
Sep. 16, 2014
Filed:
Mar. 02, 2011
Yi-cheng Wan, Taoyuan County, TW;
Jian-rong Huang, Hsinchu, TW;
Chien-hui Wang, Hsinchu, TW;
Cheng-feng Chung, Taipei, TW;
Yi-Cheng Wan, Taoyuan County, TW;
Jian-Rong Huang, Hsinchu, TW;
Chien-Hui Wang, Hsinchu, TW;
Cheng-Feng Chung, Taipei, TW;
Richtek Technology Corp., Hsinchu, TW;
Abstract
In a PWM signal generation method of a voltage regulator, an output sense signal, a first ramp signal and a second ramp signal are provided. A first time point of the first ramp signal crossing with the output sense signal is used to determine a start point of an ON-time of a PWM signal, and a second time point of the second ramp signal crossing with the output sense signal is used to determine an end point of the ON-time of the PWM signal. Moreover, the first ramp signal is reset to a reference voltage at the first time point and then maintained at the reference voltage, and further ramps down starting from the end point of the ON-time. The second ramp signal ramps up starting from the start point of the ON-time, and then is reset to a preset voltage at the second time point.