Patent ID: 7295465

Claim:
A thin film magnetic memory device comprising: a plurality of memory cells each having one of first and second electric resistances corresponding to magnetically written storage data; a reference cell having an electric resistance intermediate between said first and second electric resistances; a first data line being electrically coupled between first and second voltages via the selected memory cell corresponding to a selected address among said plurality of memory cells during data reading; a second data line being electrically coupled between said first and second voltages via said reference cell during said data reading; a level control circuit provided corresponding to said first and second data lines for changing levels of said first and second data lines to predetermined levels during said data reading; a data read circuit for performing a data read operation in accordance with a difference between passing currents of said first and second data lines; and a signal line for instructing voltage change of said predetermined level to said level control circuit, wherein said level control circuit includes capacitors each arranged between said first or second data line and an internal node, and said internal node is electrically coupled to said signal line.