Patent ID: 8331125
Filing Date: 2012-12-11
Classification: G11C

Abstract:
1. A high density memory system comprising: a plurality of M magnetic memory structures, each of said plurality of M magnetic memory structures including a track of multiple magnetic domains corresponding to N bits and including a magnetic material, said track of multiple magnetic domains including a first position and a second position different from said first position; M word lines, wherein each of said M word lines is connected to a gate of a first transistor of which a source or drain is connected to one of said M first positions, and is connected to a gate of a second transistor of which a source or drain is connected to a sensing device configured to read memory bit values stored at a magnetic domain at one of said M second positions; and a field line configured to apply a pulse signal to simultaneously create a magnetic domain of a first polarity at each said M first positions; and, a first decoder device applying word line signals to select a first subset of said plurality of magnetic memory structures; and a second decoder applying a respective push signal to advance each magnetic domain created in each respective said first subset of magnetic memory structures toward a corresponding second position, said field line subsequently applying a second signal to simultaneously create a magnetic domain of a second polarity at each of said M first positions of said plurality of magnetic memory structures, and said first decoder applying word line signals to activate a second subset of said plurality of magnetic memory structures, and said second decoder applying a respective push signal to advance each said multiple magnetic domain created in each respective said magnetic memory structure of said second subset toward a corresponding second position therein.