Title :
Design and testing of QOS comparators for an RSFQ based analog to digital converter
Author :
Brock, D.K. ; Martinet, S.S. ; Bocko, M.F. ; Przybysz, J.X.
Author_Institution :
Dept. of Electr. Eng., Rochester Univ., NY, USA
fDate :
6/1/1995 12:00:00 AM
Abstract :
Successful utilization of the quasi one-junction SQUID (QOS) as a signal comparator for analog-to-digital conversion (ADC) has been demonstrated by several groups, This idea is extended to show how similar comparators can be integrated into an all rapid single flux quantum (RSFQ) digital architecture. Comparators are interrogated by SFQ sampling pulses and in turn give output according to the RSFQ convention. One- and two-bit ADC´s have been simulated, fabricated and tested at low speed. Total performance of these devices is estimated within the framework of a multiple bit parallel flash ADC architecture.<>
Keywords :
SQUIDs; analogue-digital conversion; comparators (circuits); parallel architectures; signal sampling; superconducting device testing; superconducting logic circuits; ADC design; ADC testing; QOS comparators; RSFQ based analog to digital converter; SFQ sampling pulses; all rapid single flux quantum digital architecture; multiple bit parallel flash ADC architecture; one-bit ADC; quasi one-junction SQUID; signal comparator; two-bit ADC; Analog-digital conversion; Circuits; Computer architecture; Digital signal processing; Quantization; SQUIDs; Sampling methods; Testing; Transfer functions; Voltage;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
