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:
Apr. 22, 2003
Filed:
Aug. 18, 2000
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A test signal generating circuit generates internal test control signals from a small number of signals supplied via an address terminal in a test mode operation. According to the test control signals, the values of internal row address signal bits from an address buffer are set, while a row-related control circuit with test control function controls operations of a row selection circuit and bit line peripheral circuitry according to the test control signals. A plurality of word lines are driven simultaneously into a selected state and an acceleration test is performed according to a small number of control signals in a short period of time. Voltage stress applied between memory cell capacitors and between word lines can be accelerated with a small number of control signals.