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:
Feb. 29, 2000
Filed:
Mar. 25, 1999
Takanori Ozawa, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
A non-volatile semiconductor memory includes a ferroelectric memory cell 3 and a voltage detection circuit 2. The voltage detecting circuit 2 monitors the drop of a power supply voltage and cuts off the power supply voltage when it is lower than a prescribed voltage so that the memory cell 3 is not operated. In addition, in response to a control input signal, a control circuit 1 is provided to control the power supply voltage so that it is not cut off even when it is lower than the prescribed voltage. In this configuration, the non-volatile semiconductor memory device can be sufficiently subjected to the screening test for a short time without suffering from stress for a long time.