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:
May. 25, 2004
Filed:
Sep. 20, 2002
Hiroyuki Nakao, Hyogo, JP;
Renesas Technology Corp., Tokyo, JP;
Abstract
When a test mode signal from a control circuit is activated, an operation of a column related circuit is controlled to continuously apply a voltage stress to complementary internal data lines included in the column related circuit. Specifically, a write driver driving a data line is forcedly kept in an inactive state, a sense amplifier is connected to the internal data lines, a column select operation is prohibited and the internal data lines are forcedly, continuously driven in accordance with the write driver, or a voltage setting circuit is connected to the internal data lines and the voltage stress of the internal data lines is accelerated in accordance with the voltage setting circuit during a test. It is possible to continuously apply the voltage stress between complementary data lines of the internal data lines without the need to repeatedly carry out a data write operation, and it is possible to reduce time required for an inter-complementary data line voltage stress test.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile