Multiparameter optimization of RSFQ circuits using the method of inscribed hyperspheres

Author

Kerr, Q.P. ; Feldman, M.J.

Author_Institution

Rochester Univ., NY, USA

Volume

5

Issue

2

fYear

1995

fDate

6/1/1995 12:00:00 AM

Firstpage

3337

Lastpage

3340

Abstract

Rapid Single Flux Quantum (RSFQ) circuits must be designed with large operating margins because of variations in the fabrication process. We describe a routine to optimize the yield, rather than the critical margin, of RSFQ circuits, based on the method of inscribed hyperspheres. The operating region is mapped out with a minimum of circuit simulations taking into account the relative size of the process variations. The method is effective for as many as nine parameters. We show that the standard optimization of critical margin will often give a seriously wrong result for multidimensional parameter space.<>

Keywords

circuit analysis computing; circuit optimisation; integrated circuit yield; superconducting logic circuits; RSFQ circuits; Rapid Single Flux Quantum circuits; circuit simulation; critical margin; inscribed hyperspheres; multidimensional parameter space; multiparameter optimization; yield; Circuit noise; Circuit simulation; Fabrication; Iterative algorithms; Joining processes; Multidimensional systems; Noise figure; Optimization methods; Shape measurement; Visualization;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.403306

Filename

403306