Accession Number : ADA624330


Title :   Design and Demonstration of a 30 GHz 16-bit Superconductor RSFQ Microprocessor


Descriptive Note : Final rept. 29 Oct 2009-28 Jan 2017


Corporate Author : STATE UNIV OF NEW YORK AT STONY BROOK


Personal Author(s) : Dorojevets, Mikhail


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a624330.pdf


Report Date : 10 Mar 2015


Pagination or Media Count : 21


Abstract : The major objective of the project was to design and demonstrate operation of key components of a 30 GHz 16-bit RSFQ processor prototype implemented with the AIST/ISTEC 10 kA/cm sq. fabrication process. Our team has developed complete logical and physical designs of five RSFQ chips using the CONNECT cell library and RSFQ CAD tools developed at the Universities of Yokohama and Nagoya (Japan). The major results are the world's first successful design, fabrication, and demonstration of correct operation of a 20 GHz 8x8-bit parallel carry-save RSFQ multiplier with approximately 6K JJs, a 16-bit sparse-tree wave-pipelined RSFQ adder with approximately 10K JJs, and partial operation of an 8-bit ALU chip with approximately 9K JJs. The goal of the second phase of the project was to get detailed understanding of the performance, complexity, and energy efficiency of on-chip storage units implemented with superconductor Reciprocal Quantum Logic (RQL) using our RQL VHDL cell library tuned to the MIT Lincoln Laboratory 10 kA/cm2 248 nm process. The 8.5 GHz 1-4 Kbit 32-/64-bit multi-ported scratchpad memory, register files, write-through and write-back caches designed with RQL Non-Destructive Read-Out storage cells have the average energy consumption of 3.0-9.5 fJ/bit/operation at room temperature using the cryocooling efficiency of 0.1%.


Descriptors :   *FABRICATION , *HIGH PERFORMANCE COMPUTING , *MICROPROCESSORS , *SUPERCONDUCTORS , ASYNCHRONOUS COMPUTERS , CHIPS(ELECTRONICS) , CRYOCOOLERS , EFFICIENCY , ENERGY CONSUMPTION , LOGIC CIRCUITS , NONDESTRUCTIVE TESTING , PARALLEL PROCESSING , PROTOTYPES , SCRATCHPAD MEMORIES , STORAGE BATTERIES , SYSTEMS ENGINEERING


Subject Categories : Electric Power Production and Distribution
      Computer Hardware
      Electricity and Magnetism


Distribution Statement : APPROVED FOR PUBLIC RELEASE