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. 09, 2003
Filed:
Nov. 25, 2002
Kyoji Yamasaki, Hyogo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
An internal power supply potential generating circuit of a DRAM sets, at the time of a burn-in test, a first internal power supply potential for a wordline to an external power supply potential, maintains an internal power supply potential for a sense amplifier at an external reference potential, and maintains a second internal power supply potential for a peripheral circuit at a potential higher than the external reference potential only by a predetermined voltage. An early defect in a circuit portion to which the first internal power supply potential is applied and that in a circuit portion to which the second internal power supply potential is applied can be therefore accelerated separately from each other. Thus, a test efficiency is increased.