Title :
Effect of parasitic capacitance on DC SQUID performance
Author :
Ryhanen, T. ; Cantor, R. ; Drung, E. ; Koch, H. ; Seppa, Heikki
Author_Institution :
Phys.-Tech. Bundesanstalt, Inst. Berlin, Germany
fDate :
3/1/1991 12:00:00 AM
Abstract :
The effect of parasitic capacitance Cp on DC SQUID characteristics and noise performance has been studied using a test structure consisting of 11 identical SQUID washers with Nb films of various widths covering the slit. The measured I-V characteristics are in good agreement with simulations based on a simple lumped circuit model. The energy resolution ∈ seems to scale roughly according to ∈≈γkBT √L(C=2Cp), where γ is a dimensionless constant, kB is the Boltzmann constant, T is the temperature, C is the junction capacitance, and L is the inductance
Keywords :
SQUIDs; capacitance; niobium; Boltzmann constant; DC SQUID performance; I-V characteristics; Nb; SQUID washers; dimensionless constant; energy resolution; inductance; lumped circuit model; noise performance; parasitic capacitance; temperature; test structure; Circuit simulation; Circuit testing; Computational modeling; Computer simulation; Coupling circuits; Energy resolution; Inductance; Niobium; Parasitic capacitance; SQUIDs;
Journal_Title :
Magnetics, IEEE Transactions on
