Patent ID: 8773897
Filing Date: 2014-07-08
Classification: G11C

Abstract:
1. A writing circuit for a magnetoresistive memory cell, the writing circuit comprising: a first electrical connecting terminal configured to provide a first electrical signal in a first direction to the magnetoresistive memory cell; a second electrical connecting terminal configured to provide a second electrical signal in the first direction to the magnetoresistive memory cell; a third electrical connecting terminal configured to provide a third electrical signal in a second direction to the magnetoresistive memory cell; a fourth electrical connecting terminal configured to provide a fourth electrical signal in the second direction to the magnetoresistive memory cell; a first reference potential terminal; a second reference potential terminal; a first switch configured to couple one of the first electrical connecting terminal, the second electrical connecting terminal, the third electrical connecting terminal and the fourth electrical connecting terminal to the magnetoresistive memory cell; a second switch configured to couple the first reference potential terminal to the magnetoresistive memory cell if the first electrical connecting terminal or the second electrical connecting terminal is coupled to the magnetoresistive memory cell, and to couple the second reference potential terminal to the magnetoresistive memory cell if the third electrical connecting terminal or the fourth electrical connecting terminal is coupled to the magnetoresistive memory cell; wherein the first direction corresponds to a direction from a first terminal of the magnetoresistive memory cell to a second terminal of the magnetoresistive memory cell and the second direction corresponds to a direction from the second terminal of the magnetoresistive memory cell to the first terminal of the magnetoresistive memory cell; wherein the first electrical signal, the second electrical signal, the third electrical signal and the fourth electrical signal have different amplitudes; wherein the first electrical signal, the second electrical signal, the third electrical signal and the fourth electrical signal have the same polarity.