Title :
77 GHz RSFQ counter for DC Josephson voltage standard applications
Author :
Pambianchi, M.S. ; Wenquan Li ; Coughlin, J. ; Talej, E. ; Brock, D.K.
Author_Institution :
HYPRES, Elmsford, NY, USA
fDate :
6/1/1999 12:00:00 AM
Abstract :
Josephson primary voltage standards require a frequency-locked 77 GHz signal to perform precise frequency-to-voltage conversion. We describe the development of superconducting frequency counters used for microwave source locking in Josephson junction array primary voltage standards, and discuss design challenges and high speed test results. The counters increase the accessibility of Josephson standards by reducing the size, number of components, and cost of these systems.
Keywords :
Josephson effect; counting circuits; measurement standards; superconducting arrays; superconducting integrated circuits; voltage measurement; 77 GHz; Josephson junction array; RSFQ chip; design; frequency locking; frequency-to-voltage conversion; high speed testing; microwave source locking; primary DC voltage standard; superconducting frequency counter; Circuit testing; Counting circuits; Frequency conversion; Frequency synthesizers; Josephson junctions; Pulse amplifiers; Radiation detectors; Signal synthesis; Temperature; Voltage;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
