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:
Mar. 28, 2017
Filed:
Mar. 18, 2016
Rohm Co., Ltd., Kyoto, JP;
Tadashi Akaho, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
When a voltage difference between a raised output voltage vcp and an input voltage vin is larger than a set voltage value, based on a added-on voltage vup detected by a voltage monitoror a current iu passing through the voltage monitor, the clock generator controlleris activated. Then the clock generator controllerdraws in a frequency control current iw from a clock generatorside, switches the frequency Fclk of a clock signal CLK generated by the clock generatorfrom a first frequency, which is comparatively high, to a second frequency, which is one or more digits lower than the first frequency, and applies the clock signal CLK to the voltage raiser. The voltage raisersaves power by performing voltage raising (charge pumping) at the second frequency.