Hybrid design of parallel signature analyzers

Parallel signature analyzers implemented as multiple-input linear-feedback shift registers (MISRs) are very useful for compressing test response data. The author presents a top-bottom exclusive (TBE) MISR which uses only (t+1)/2 XOR gates, in its linear feedback instead of t XOR gates used in other types of MISRs. An algebraic analysis of the operation and certain analytical results regarding the detection capability of a TBE-type MISR are included.<
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