Patent ID: 9097751
Filing Date: 2015-08-04
Classification: G01R

Abstract:
1. A method for improving linearity over a wide dynamic range for an amplifier, comprising the steps of: A) providing a plurality of N individual array cells; each said array cell having 3 Josephson Junctions to establish a bi-Superconductive Quantum Interference Device (SQUID) for said array cell, each said Josephson Junction having a critical current i B) connecting said array cells in series to establish a Superconducting Quantum Interference Filter (SQIF) array of N said bi-SQUIDs; wherein said step B) establishes mutual inductances between said array cells, and wherein said non-linearity parameter β wherein said critical current is determined according to the relationship where φ i,j are the phases on each said Josephson Junctions J ij , i=1 to N, j=1 to 3, L 1,i =(L 1a,i +L 1b,i ), a n,i is a parameter related to the loop size between J i,1 and J i,2 , and M is the coupling strength for the phase interaction Φ i between adjacent said bi-SQUIDS (one adjacent said bi-SQUID for edge said bi-SQUIDS a=1 and N, and two neighboring said bi-SQUIDs for inner said bi-SQUIDS a=2 through N−1) according to where i