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:
May. 03, 2016
Filed:
Aug. 09, 2012
Osamu Yanagida, Kyoto, JP;
Osamu Yanagida, Kyoto, JP;
ROHM CO., LTD., , JP;
Abstract
A control circuit for controlling a switching transistor of a switching regulator includes a hysteresis comparator circuit comparing a feedback voltage according to an output signal of the switching regulator with a reference voltage and a threshold voltage and outputting a pulse width modulation signal as an output signal of the hysteresis comparator circuit, where the threshold voltage has a hysteresis according to the pulse width modulation signal. The control circuit further includes a driver driving the switching transistor based on the pulse width modulation signal, a phase comparator generating a phase difference signal based on a phase difference between a reference clock signal and a pulse signal corresponding to the pulse width modulation signal, and a loop filter generating a control voltage by filtering the phase difference signal. The hysteresis comparator circuit is further configured to control a response speed thereof depending on the control voltage.