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. 09, 2010
Filed:
Jan. 30, 2008
Hiroyuki Horibata, Gifu, JP;
Hiroyuki Horibata, Gifu, JP;
Epson Imaging Devices Corporation, Azumino-shi, JP;
Abstract
An unnecessary through current is suppressed and insufficiency of an output electric potential and increase in power consumption are suppressed in a power supply circuit using a charge pump method. In order to suppress a reduction in an output electric potential VPP as well as suppressing transient through currents Iand Iwhen a clock DCCLK is inverted, resistances Rof a wiring, Rof a wiringand Rof a wiringare set so as to satisfy relations R>Rand R>R. That is, the through currents Iand Ican be suppressed by reducing the resistances Rand Rso that electric potentials Vand Vare quickly inverted when the clock DCCLK is inverted. Also, the through current Ican be suppressed to suppress the reduction in the positive output electric potential VPP by setting the resistance Rto be larger than either of the resistances Rand R