US 12,494,263 B2 · Flash memory for performing margin read test operation and margin read test system including the same

Abstract

A flash memory includes a first memory cell connected with a selected word line and a first bit line, a second memory cell connected with the selected word line and a second bit line, a sense amplifier that provides a sensing line with a sensing current for sensing data stored in the first memory cell or the second memory cell, a bit line selection circuit that selects a bit line by connecting the sensing line with the first bit line or the second bit line, and a margin read test circuit that performs a margin read test operation in which the margin read test circuit provides the sensing line with a margin current for testing a read margin of the data stored in the first memory cell or the second memory cell that is connected to the selected bit line.

Claims20

Dependent claims

A flash memory comprising:

a first memory cell connected with a selected word line and a first bit line;
a second memory cell connected with the selected word line and a second bit line;
a sense amplifier configured to provide a sensing line with a sensing current for sensing data stored in the first memory cell or the second memory cell;
a bit line selection circuit configured to select a bit line by connecting the sensing line with the first bit line or the second bit line;
and
a margin read test circuit configured to perform a margin read test operation in which the margin read test circuit provides the sensing line with a margin current and adjusts the margin current provided to the sensing line to test a read margin of the data stored in the first memory cell or the second memory cell that is connected to the selected bit line.

3 more elements

Dependencies are inferred from the claim text.

Flash memory for performing margin read test operation and margin read test system including the same

Life of this patent

Flash memory for performing margin read test operation and margin read test system including the same

Life of this patent

Abstract

Claims20