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:
Jan. 11, 2011
Filed:
Feb. 19, 2009
Yuki Hosoe, Tokyo, JP;
Yuki Hosoe, Tokyo, JP;
Elpida Memory, Inc., Tokyo, JP;
Abstract
A semiconductor device includes a voltage step-up circuit and a control circuit. The voltage step-up circuit includes at least a first capacitor and a second capacitor which generate an internal power supply voltage. The control circuit controls the voltage step-up circuit. The control circuit connects the first and second capacitors in series to perform a first voltage step-up operation and connects the first and second capacitors in parallel to perform a second voltage step-up operation. The voltage step-up circuit generates a first stepped-up voltage in the first voltage step-up operation and generates a second stepped-up voltage in the second voltage step-up operation. The circuit area of the voltage step-up circuit with a plurality of stepped-up levels is reduced.