SQUID Type Logic Devices

Abstract

The interferometer type Josephson devices, i.e. SQUIDs, are noted as potential elements for high speed computers. Recent studies on SQUIDs for logic and memory circuits are introduced here.
Design theory is presented for the purpose of applying the SQUIDs to these digital circuits. The threshold characteristics are expressed analytically by using device parameters such as junction length and distance between junctions. Experimentally obtained results are described in detail and they are compared with theoretical ones.
Recent studies on digital circuits using SQUIDs are presented and also new type SQUIDs are introduced.