Generalized Parallel Signature Analyzers with External Exclusive-OR Gates

A new generalized parallel signature analyzer with external Exclusive-OR gates(GPSA-EE)is presented.It allows the signature analyzer to have twice the number of inputs compared with an original parallel signature analyzer.The equivalence between a GPSA-EE and an SSA-EE(serial signature analyzer)is established.Using the concept of multiple signatures,the error detection capability of signature analyzer can be enhanced by changing the connection between signature analyzer and circuit-under-test, or changing t…