Spectral Fault Signatures for Internally Unate Combinational Networks

A method is described for the derivation of fault signatures for certain classes or irredundant combinational networks. These signatures consist of a set of values derived from the network. Any stuck-at fault causes at least one of the values to change. The signatures provide complete fault detection for all single stuck-at faults. They are usually short and never contain more than n + 1 values for an n-input network.