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:
Dec. 15, 2009
Filed:
Feb. 01, 2008
Kenta Kato, Kasugai, JP;
Kenta Kato, Kasugai, JP;
Spansion LLC, Sunnyvale, CA (US);
Abstract
The present invention provides a voltage generating circuit and a control method thereof which is capable of preventing an increase in the occupied area and suitable for raising the voltage of the power supply in a wide range. This voltage generating circuit comprises a first charge pump unit to which a first clock signal is inputted, wherein the first charge pump unit generates a voltage by pumping a voltage of a first external power supply in stages by a first voltage, a voltage selector that selects the voltage generated by the first charge pump unit or a voltage of a second external power supply in accordance with a voltage selection command signal, a level converter that converts a voltage level of the first clock signal into a second voltage level, and a second charge pump unit to which the second clock signal that has been converted by the level converter is inputted, wherein the second charge pump unit and that generates a voltage and by pumping the selected voltage or the voltage of the second external power supply.