Patent ID: 7791930
Filing Date: 2010-09-07
Classification: G11C

Abstract:
1. A magnetoresistive random access memory comprising: a first magnetoresistive effect element that takes a low resistance state and a high resistance state; a second magnetoresistive effect element fixed to a low resistance state or a high resistance state; a first MOSFET having a first end connected to the first magnetoresistive effect element and having a gate terminal that receives first potential; a second MOSFET having a first end connected to the second magnetoresistive effect element; a sense amplifier amplifying a difference between a value of current that flows through a second end of the first MOSFET and a value of current that flows through a second end of the second MOSFET; a current circuit outputting reference current whose value lies between current that flows through the first magnetoresistive effect element of the low resistance state and current that flows through the first magnetoresistive effect element of the high resistance state; a third MOSFET having a first end that receives the reference current and is connected to its own gate terminal, a gate terminal of the second MOSFET receiving substantially the same potential as the gate terminal of the third MOSFET; and a first resistance element connected to a second end of the third MOSFET and having substantially the same resistance as the second magnetoresistive effect element.