| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a sensing amplifier in which a difference between a reference voltage and a sensing voltage is obtained largely and a sensing speed and sensitivity are improved. SOLUTION: In a sensing amplifier amplifying a difference between sensing voltage set to a node N20 from a load transistor 204 and a cell current source 207 and reference voltage set to a node N2 from a load transistor 104 and a reference current source 107, both of the load transistors 104, 204 are controlled with the same voltage, for example, a voltage of a node N2. For example, in off-cell reading, since a current by a cell current source 207 is not made to flow, a current is not discharged from the node N20, on the other hand, since the load transistor 204 corresponds to a voltage of the node N2, a current is supplied to the node N20 without turning off, sensing voltage of the node N20 is largely boosted, a difference between a sensing voltage of the node N20 and a reference voltage of the node N2 is widened larger than conventional difference.</p> |
