Patent ID: 9058884
Filing Date: 2015-06-16
Classification: G11C

Abstract:
1. A semiconductor storage device comprising: a plurality of resistance change storage elements; a signal holding part configured to hold a plurality of voltages according to data stored in the storage elements; and a sense amplifier configured to detect the data stored in the storage elements based on the voltages held in the signal holding part, wherein the signal holding part holds a first voltage according to target data stored in a first storage element selected from among the storage elements, holds a second voltage according to first sample data of a first logic written to the first storage element, and holds a third voltage according to second sample data of a second logic written to the first storage element, the second logic being opposite to the first logic, and the sense amplifier compares a read signal based on the first voltage with a reference signal generated based on the second and the third voltages in order to detect a logic of the target data stored in the first storage element, wherein the signal holding part comprises: