DESIGN AND FABRICATION OF QFP LOGIC GATES BASED ON YBA2CU3O7 STEP-EDGE JUNCTIONS

Quantum Flux Parametron (QFP) logic gates were designed and fabricated from a single layer of YBa2Cu3O7 thin film based on step-edge Josephs on junctions, Self-inductance (L) of the QFP loop, an important circui t parameter, as is critical current (I-c) of the Josephson junction, w as determined by using directly coupled de superconducting quantum int erference devices (SQUIDs). Magnetically coupled de SQUIDs were used t o detect the output signal from the QFP, Simulated waveforms were used to identify the operation modes of the QFP as a function of the circu it parameters, From examination of the output waveforms of the QFP, op eration in agreement with simulations was confirmed.