Superconducting-semiconducting electronics (SSE) for broadband SQUID applications

Abstract
Conventional Superconducting Quantum Interference Devices (SQUIDs) have been used since the middle of the 60s to measure magnetic and electrical quantities. The critical point in using of the SQUIDs was a small value of the flux-to-voltage transfer coefficient. It required using of matching transformer and lock-in technique to receive a noiseless amplification. To increase the transform coefficient several new design of SQUIDs were offered in the last decade. In this report the new SQUIDs are described and a comparative analysis of their performance is given. Perspectives of wide-band devices based on the new SQUIDs and cooled semiconductors elements are discussed. New fields of application of the superconducting-semiconducting elements are considered.