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:
Oct. 15, 2024
Filed:
Jan. 09, 2023
Fujitsu Limited, Kawasaki, JP;
Hiroshi Nakadai, Chuo, JP;
FUJITSU LIMITED, Kawasaki, JP;
Abstract
A semiconductor storage device includes: a storage element that holds data; a bit line that is coupled to the storage element and in which step-down to reference voltage causes data held in the storage element to be inverted, a first step-down circuit that steps down bit line voltage to a first predetermined value equal to or below the reference voltage, the bit line voltage being voltage applied to the bit line; and a control circuit that detects a first voltage change based on a first output from a first inverter which has a voltage dependence of an occurring delay and a second output from a second inverter in which a voltage dependence of an occurring delay is larger than that of the first inverter, and that controls a step-down amount of the bit line voltage by the first step-down circuit depending on an amount of the detected first voltage change.