Patent ID: 6804144
Filing Date: 2004-10-12
Classification: G11C

Abstract:
A magnetic random access memory comprising:a memory cell which stores data by using a magnetoresistive effect; a current source which supplies a read current to said memory cell; a storage circuit which stores the read current or a current proportional to the read current; and a sense amplifier which determines data of said memory cell on the basis of the read current or the current proportional to the read current and a second input potential based on the current stored in said storage circuit; wherein said sense amplifier comprises: a first differential amplifier which receives a first input potential based on the read current or the current proportional to the read current and a second input potential based on the current stored in said storage circuit; a second differential amplifier which receives a first reference potential and a second output potential from said first differential amplifier which corresponds to the first input potential; a third differential amplifier which receives a second reference potential and a second circuit potential from said first differential amplifier which corresponds to the second input potential; and a logic circuit which determines data in said memory cell on the basis of a third output potential from said second differential amplifier and a fourth circuit potential from said third differential amplifier.