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. 21, 2019
Filed:
Sep. 04, 2017
Toshiba Memory Corporation, Tokyo, JP;
Yoshinori Suzuki, Kawasaki Kanagawa, JP;
Takayuki Miyazaki, Tokyo, JP;
Toshiba Memory Corporation, Tokyo, JP;
Abstract
A non-volatile semiconductor memory device includes a current source providing a reference current to a first node and a clamp circuit. The clamp circuit includes a transistor having a current path between the first node and a second node, and an amplifier circuit having a first input port at which a cell reference voltage can be received, a second input port connected to the second node, and an output port connected to a control terminal of the transistor. The amplifier circuit is configured to output a differentially amplified signal from the output port. A memory cell is connected between a bit line and a word line and includes a variable resistance element. The bit line can be connected to the second node. A sense amplifier is connected to the first node to detect data stored in the memory cell.