| 摘要 |
PURPOSE: A fail bit counter of a nonvolatile memory device is provided to output a pass signal if the number of fail bit is small by setting the available number of bits in advance. CONSTITUTION: A reference current supplying part(210) supplies a reference current and a reference voltage including a current mirror shaped constant current source. A pass fail status check part(220) comprises pull-down parts and a pull-up parts. The pass fail status check part changes the voltage of a first connection node according to the number of fail cells. A pass fail signal generating part compares a reference voltage and the voltage of a first connection node. The pass fail signal generating part generates a pass signal or a fail signal.
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