Electronic device

An electronic device including a semiconductor memory, the semiconductor memory comprising:

• a memory cell array of a plurality of memory cells each including a variable resistance element exhibiting different resistance values representing different digital information and outputting, to a corresponding bit line, a cell voltage corresponding to a resistance value of the variable resistance element;
• a driving control circuit coupled to the memory cell array and operable to control a reference data to be written in a selected memory cell among the memory cells, during a sensing operation;
• a resistance monitoring circuit coupled to the memory cell array and operable to output a monitoring voltage by monitoring, during a write operation for writing the reference data, a change in the resistance value based on the cell voltage at the bit line;
• and
• an amplifying circuit coupled to the resistance monitoring circuit and operable to amplify the monitoring voltage and output an amplified monitoring voltage as output data.