Title :
Broadband interfacing of superconducting digital systems to room temperature electronics
Author :
Schneider, D.F. ; Lin, J.C. ; Polonsky, S.V. ; Semenov, V.K. ; Hamilton, C.A.
Author_Institution :
State Univ. of New York, Stony Brook, NY, USA
fDate :
6/1/1995 12:00:00 AM
Abstract :
We have developed and tested simple and inexpensive electronics for interfacing Rapid Single-Flux-Quantum (RSFQ) Josephson-junction circuits to room temperature digital systems. Voltage-level (Non-Return-to-Zero) bit signals with a swing of /spl sim/150 uV, developed on-chip by standard SFQ/DC converters, and in some cases amplified to 1.5 mV swing by HUFFLE-type circuits, are passed to the 300 K environment using a high density (40 channel) flexible coplanar waveguide assembly. AC-coupled, 2-3 stage microwave Si-bipolar amps, and Emitter-Coupled-Logic (ECL) buffers accomplish voltage level translation to the standard ECL levels, Using this technique, data rates in excess of 1 Gb/s per channel can be achieved at low cost per channel,.<>
Keywords :
Josephson effect; coplanar waveguides; driver circuits; superconducting device testing; superconducting logic circuits; 1 Gbit/s; 300 K; ECL buffers; HUFFLE-type circuits; SFQ/DC converters; broadband interfacing; data rates; flexible coplanar waveguide assembly; rapid single-flux-quantum Josephson-junction circuits; room temperature electronics; superconducting digital systems; voltage level translation; voltage-level bit signals; Circuit testing; DC-DC power converters; Digital systems; Electronic equipment testing; Standards development; Superconducting microwave devices; Superconducting photodetectors; System testing; Temperature; Voltage;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
