DESIGN TOOLS FOR PARAMETER DETERMINATION AND SIMULATION OF INTEGRATEDJOSEPHSON STRUCTURES

The recent development of integrated Josephson circuits with increased complexity - e.g. RSFQ devices - invokes the need of a comprehensive computer-aided design support. The derivation of circuit parameters fr om layout data as well as an efficient and versatile simulation techni ques are essential means in the design and dimensioning of complex int egrated structures. We present a comprehensive solution for calculatin g circuit parameters and simulating the device dynamics. The calculati on of inductances and capacitances is performed by three-dimensional f ield computation using special developed programs which have been prov en in high-T-c SQUID design. They can process layout information in st andard graphic interchange formats (e.g. DXF). The netlists for device simulation can be generated automatically from the equivalent circuit schematic. Additionally, a technique for distributed simulation, whic h allows performing margins-and-yields-analyses in an efficient manner , was elaborated. The performance of the whole design tool set is demo nstrated using basic RSFQ circuits.