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Kinetic inductance memory cell and architecture for superconducting computers

Posted on:1994-10-14Degree:Ph.DType:Thesis
University:Stanford UniversityCandidate:Chen, George JFull Text:PDF
GTID:2470390014993853Subject:Engineering
Abstract/Summary:
Josephson memory devices typically use a superconducting loop containing one or more Josephson junctions to store information. The magnetic inductance of the loop in conjunction with the Josephson junctions provides multiple states to store data. This thesis shows that replacing the magnetic inductor in a memory cell with a kinetic inductor can lead to a smaller cell size. However, magnetic control of the cells is lost. Thus, a current-injection based architecture for a memory array has been designed to work around this problem. The isolation between memory cells that magnetic control provides is provided through resistors in this new architecture. However, these resistors allow leakage current to flow which ultimately limits the size of the array due to power considerations. A kinetic inductance memory array will be limited to 4K bits with a read access time of 320 ps for a 1 um linewidth technology. If a power decoder could be developed, the memory architecture could serve as the blueprint for a fast {dollar}({dollar}1 Mbit) superconducting memory array.
Keywords/Search Tags:Memory, Superconducting, Architecture, Josephson junctions
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