Delay-testable implementations of symmetric functions
Wuudiann Ke, Prem R. Menon · IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems · 1995
We show that most symmetric functions do not have delay-testable two-level implementations. A method of transforming any untestable minimal two-level implementation of a symmetric function into a delay-testable three- or four-level one using the distributive law is presented.>