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. 17, 2021
Filed:
Apr. 16, 2020
Elite Semiconductor Memory Technology Inc., Hsinchu, TW;
Che-Wei Hsu, Hsinchu, TW;
ELITE SEMICONDUCTOR MEMORY TECHNOLOGY INC., Hsinchu, TW;
Abstract
A constant on-time controller (COT) includes: a voltage dividing circuit to generate a feedback voltage according to an output voltage of a buck regulator; a current ripple extracting circuit to sense a current from an inductor of a buck regulator, and generate an extracted ripple current having no DC component according to a sensed current; a one-shot on-timer to output a constant-on time control signal according to a regulator input voltage of the buck regulator and the output voltage; a comparing circuit to output a comparison result according to a reference voltage signal, the feedback voltage and the extracted ripple current; and a logic circuit to generate a control signal to the buck regulator according to the comparison result and the constant-on time control signal. The current ripple extracting circuit detects the DC component in the present cycle, and compares the detected DC component with the next cycle.