Principals of Superconductive Circuits

Superconductive circuits are introduced in this chapter. Both analog and digital circuits are described, and memory topologies are presented. Among the analog devices, one- and two-junction SQUIDs are introduced along with characteristic expressions and common applications. Different families of superconductive digital logic, such as voltage level logic, rapid single flux quantum logic, reciprocal quantum logic, and adiabatic quantum flux parametron logic, are described. The basic principles of adiabatic and reversible computing are also reviewed. Finally, different types of cryogenic memory are introduced, and the advantages and disadvantages of these memory topologies are discussed.