By Topic

IEEE Transactions on Applied Superconductivity

Issue 2 • June 1993

Filter Results

Displaying Results 1 - 5 of 5
  • Phase tree: a periodic, fractional flux quantum vernier for high-speed interpolation of analog-to-digital converters

    Publication Year: 1993, Page(s):3001 - 3008
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (823 KB)

    A Josephson junction circuit that can rapidly track and record a magnetic flux signal to a small binary fraction of the flux quantum is proposed. This so-called phase tree circuit behaves periodically, recording the residue of the signal modulo the flux quantum in 2/sup p/ths of a flux quantum for a p-level binary tree. Signal quantization is accomplished by comparators that read the 2/sup p-1/ ci... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Shift registers and correlators using a two-phase single-flux quantum pulse clock

    Publication Year: 1993, Page(s):3009 - 3012
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (424 KB)

    A two-phase clocking scheme for rapid single flux quantum logic circuits, in particular, shift registers and correlators, is discussed. The two-phase pulse clock is generated on chip with one external clock line. The use of a two-phase clock improves the clock operating margins and eliminate the racethrough problem. A 32-b shift register has been built and tested up to a clock frequency of 21.6 GH... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A 2-kbit superconducting memory chip

    Publication Year: 1993, Page(s):3013 - 3021
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (985 KB)

    A 2-kb nondestructive readout memory chip has been built using an Nb/AlO/sub x//Nb Josephson-junction process with a 2.5- mu m design rule. A bitmap of 56% functional cells among 1.5 K tested cells, a read access time of 200 ps, an average cycle time of 500 ps without the decoder, and a power dissipation of 1.6 mW including peripheral circuits have been obtained. The decoding time is estimated to ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Margin analysis of quantum flux parametron logic gates

    Publication Year: 1993, Page(s):3022 - 3028
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (678 KB)

    An analytical approach is used to estimate the (quasi-static) margins of quantum flux parametron (QFP) logic gates. The operation of a single QFP is analyzed in detail, and input biases or output variations caused by parameter fluctuations are obtained. The results are used to estimate the margins and yields of the QFP logic gates. The relations between the margin and the parameter fluctuations ar... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Intrinsic stress in DC sputtered niobium

    Publication Year: 1993, Page(s):3029 - 3031
    Cited by:  Papers (12)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (246 KB)

    The intrinsic mechanical stress of DC-magnetron-sputtered Nb films is characterized as a function of sputtering parameters and target erosion. The zero-stress point shifts to lower cathode voltages as the target erodes. The zero-stress point is always characterized by the same cathode-current-Ar-pressure relationship.<> View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.

Aims & Scope

IEEE Transactions on Applied Superconductivity contains articles on the applications of superconductivity and other relevant technology.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Britton L. T. Plourde
Syracuse University
bplourde@syr.edu
http://asfaculty.syr.edu/pages/phy/plourde-britton.html