Patent ID: 6999339

Claim:
An MRAM integrated circuit comprising: a row line; a column line; an MRAM cell proximate the row line and column line and switchable between first and second binary states in response to current imparted to at least one of the row line and column line, current imparted to the row line in one direction causing a magnetic field operative on the MRAM cell tending to cause the MRAM cell to flip to the second binary state, current imparted to the column line in one direction causing a magnetic field operative on the MRAM cell that is generally additive to the magnetic field caused by current imparted to the row line; first circuitry configured to impart a selectable amount of current to the row line; second circuitry configured to impart a selectable amount of current to the column line; a magnetic sensor proximate the MRAM cell and configured to sense a level of environmental magnetic field applied to the MRAM cell exclusive of any field generated by the row line and column line; and third circuitry coupled to the magnetic sensor and at least one of the first circuitry and second circuitry to selectively adjust the amount of current imparted to at least one of the row line and column line in response to the level sensed by the magnetic sensor.