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United States Patent Application

View the Complete Application at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
Methods and apparatus are disclosed for operating a memory cell formed from the plurality of coupled Josephson junctions. The memory cell is configured such that applying an electrical signal to the junctions can cause at least one, but not all, of the junctions to change their respective phase states. Subsequent writes to the memory cell using substantially the same electrical pulse do not change the phase state of the plurality of junctions. The memory cell can be ready by providing another electrical pulse to one of the junctions and receiving an output electrical pulse generated in response by a different Josephson junction of the memory cell. A set of phase states are selected to represent the logic values that are stable across anticipated operating conditions for the memory cell. Methods of selecting electrical parameters and manufacturing memory cells are further disclosed.
Braiman, Yehuda (Oak Ridge, TN), Imam, Neena (Knoxville, TN), Neschke, Brendan (Tucson, AZ)
UT-Battelle, LLC (Oak Ridge TN), University of Tennessee Research Foundation (Knoxville TN)
15/ 726,173
October 5, 2017
ACKNOWLEDGMENT OF GOVERNMENT SUPPORT [0002] This invention was made with government support under Contract No. DE-AC05-00OR22725 awarded by the U.S. Department of Energy. The government has certain rights in the invention.