Title :
An HTS quasi-one junction SQUID-based periodic threshold comparator for a 4-bit superconductive flash A/D converter
Author :
Wiegerink, R.J. ; Gerritsma, G.J. ; Reuvekamp, E.M.C.M. ; Verhoeven, M.A.J. ; Rogalla, H.
Author_Institution :
Dept. of Appl. Phys., Twente Univ., Enschede, Netherlands
Abstract :
An all high-T/sub c/ periodic threshold comparator for application in a 4-bit superconductive A/D converter has been realized and tested. The theoretical threshold curve of the comparator is calculated and compared to the measured results. Furthermore, the thermal noise immunity and the influence of flux-flow are considered, resulting in practical design constraints for the comparator circuit.<>
Keywords :
SQUIDs; analogue-digital conversion; comparators (circuits); high-temperature superconductors; superconducting device noise; superconducting device testing; superconducting integrated circuits; thermal noise; 4 bit; 4-bit superconductive flash A/D converter; HTS periodic threshold comparator; HTS quasi-one junction SQUID; design constraints; flux-flow; thermal noise immunity; threshold curve; Bandwidth; Circuit noise; Critical current; Equivalent circuits; High temperature superconductors; Sampling methods; Superconducting device noise; Superconductivity; Switches; Switching circuits;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
