Effect of parasitic capacitance on DC SQUID performance
Tapani Ryhänen, R. Cantor, D. Drung +2 more
The effect of parasitic capacitance C/sub p/ 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 in seems to scale roughly according to in approximately= gamma /sub k/B/sup T/ square root L(C=2C/sub p/), where gamma is a dimensionless constant, k/sub B/ is the Boltzmann constant, T is the temperature, C is the junction capacitance, and L is the inductance.
IEEE Transactions on Magnetics•Mar 1, 1991•18 citations