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:
Jun. 01, 2004
Filed:
Jan. 10, 2003
Takashi Itou, Hyogo, JP;
Renesas Technology Corp., Tokyo, JP;
Abstract
A semiconductor memory device is provided with a power supply circuit. The power supply circuit includes a reference voltage generating circuit which generates a first reference voltage, a booster circuit which generates a first internal power supply voltage by boosting an external power supply voltage using the first reference voltage, another reference voltage generating circuit which generates a second reference voltage, and a VDC circuit which generates a second internal power supply voltage by down-converting the first internal power supply voltage to a voltage level of the second reference voltage. The generated second internal power supply voltage is supplied to a DLL, and the DLL generates a periodic signal having a phase corresponding to the voltage level of the second internal power supply voltage.