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:
Jul. 29, 2003
Filed:
Nov. 15, 2001
Norihiko Satani, Miyazaki, JP;
Masakuni Kawagoe, Miyazaki, JP;
Abstract
Switching is provided such that the bit lines between a sense amp and the memory cells connected to the sense amp are put into a non-conducting state during normal operation, and are put into a conducting state during characteristic tests. A control circuit is provided which outputs control signals to control the conducting state of this switching. The control circuit has a signal generation unit and a control signal switching unit. The signal generation unit generates driving signals and the inverted signals of these driving signals in order to drive the control circuit using applied voltages from outside. The control signal switching unit includes a plurality of transmission gates, and outputs control signals according to memory cell select signals and the inverted signals of same, based on the combination of conducting and non-conducting states of the transmission gates, which depend on the supply of driving signals and inverted driving signals.