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. 29, 2009
Filed:
Mar. 09, 2005
Masaru Sakai, Kyoto, JP;
Kiyotaka Umemoto, Kyoto, JP;
Shogo Hachiya, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
A control signal generating circuit () comprises a comparator () for comparing an output voltage Vwith a reference voltage outputted from a reference voltage source (), a flipflop () set by the output of the comparator (), and a pulse control circuit () which receives an input voltage V, a reference voltage V, and the inverted output of the flipflop (), sets the on time in accordance with the ratio between the input voltage Vand the reference voltage V, and resets the flipflop () when the on time elapses after the output pulse of the flipflop () rises. The output pulse of the flipflop () is outputted as a control signal into a driver logic circuit (). The driver logic circuit () performs on/off control of NMOSs () according to the control signal. Thus, a switching regulator capable of operating at high speed can be realized.