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