Semiconductor storage device and control method of semiconductor storage device
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United States of America Patent
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Oct 15, 2024
Grant Date -
Sep 14, 2023
app pub date -
Jan 9, 2023
filing date -
Mar 14, 2022
priority date (Note) -
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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.
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