Title :
Ultimate sensitivity of the dc SQUIDs using unshunted Josephson tunnel junctions
Author_Institution :
Moscow State University, Moscow, U.S.S.R.
fDate :
5/1/1983 12:00:00 AM
Abstract :
An analitical theory of dc SQUIDs using unshunted Josephson tunnel junctions is developed. An expression for the phase as a function of time has been found for the process of switching from zero-voltage state to gap-voltage state. Expressions are derived for the signal transfer function and for the voltage noise spectrum density in the SQUID. An ultimate sensitivity limit is found, and the comparison is performed between these devices and usual dc SQUIDs using shunted Josephson tunnel junctions.
Keywords :
Josephson devices; Critical current; Frequency; Integrated circuit noise; Josephson junctions; Oscillators; Physics; Pulse circuits; SQUIDs; Transfer functions; Voltage;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.1983.1062494
