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. 04, 2018
Filed:
Dec. 28, 2016
Novatek Microelectronics Corp., Hsinchu, TW;
Wei-Ling Chen, Hsinchu County, TW;
Novatek Microelectronics Corp., Hsinchu, TW;
Abstract
A DC-to-DC converter and a PWM device thereof are provided. The PWM device includes a ramp generator circuit, an error amplifier, a comparator and a clamping circuit. The error amplifier compares a voltage difference between the feedback voltage and the reference voltage to output a comparison voltage corresponding to the voltage difference. The comparator compares a ramp voltage of the ramp generator circuit and the comparison voltage of the error amplifier, so as to output a pulse signal. The clamping circuit determines whether to induce the comparison voltage to follow the ramp voltage. The clamping circuit is disabled when the PWM device is operated in the PWM mode, such that the comparison voltage and the ramp voltage are independent of each other. The clamping circuit is enabled when the PWM device is operated in the non-PWM mode, such that the comparison voltage follows the ramp voltage.