| 摘要 |
A method of operating an integrated circuit is provided. The integrated circuit includes a plurality of resistivity changing memory cells and at least one resistivity changing reference cell; a voltage comparator including a first input terminal and a second input terminal; a signal line being connected to the plurality of resistivity changing memory cells, the at least one resistivity changing reference cell, and the second input terminal; and a switching element connecting the first input terminal to the second input terminal. The method includes: closing the switching element; supplying a first voltage to the first input terminal via the signal line and the switching element; opening the switching element; supplying a second voltage to the second input terminal via the signal line; and comparing the first voltage and the second voltage using the voltage comparator, wherein the first voltage represents a memory state of a resistivity changing memory cell, and the second voltage is a reference voltage which represents a memory state of a resistivity changing reference cell, or vice versa.
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