Title :
Josephson counting analog-to-digital converter
Author :
Miller, Donald L. ; Przybysz, John X. ; Kang, Joonhee ; Hamilton, Clark A. ; Burnell, David M.
Author_Institution :
Westinghouse Electr. Corp., Pittsburgh, PA, USA
fDate :
3/1/1991 12:00:00 AM
Abstract :
A superconductive analog-to-digital converter which uses a DC SQUID as a quantizer and a flip-flop counter as a digitizer has been designed, fabricated, and tested. The circuit was fabricated using a ten-level niobium process. Tests at 4.2 K demonstrated counting to the full 12-b accuracy of the design, monotonic A/D conversion with linearity to less than 1 LSB over the more than 9-b range of conversion, read-on-the-fly operation with counter overflow, and counter operation with a gate current bus
Keywords :
SQUIDs; analogue-digital conversion; niobium; superconducting logic circuits; superconducting materials; 12 bit; 4.2 K; ADC; DC SQUID; Josephson counting analog-to-digital converter; Nb; counter operation; counter overflow; digitizer; flip-flop counter; gate current bus; linearity; monotonic A/D conversion; quantizer; read-on-the-fly operation; Analog-digital conversion; Circuit testing; Coils; Counting circuits; Dynamic range; Flip-flops; Magnetics; Quantum mechanics; SQUIDs; Superconductivity;
Journal_Title :
Magnetics, IEEE Transactions on
