Spectral Modification of the LFSR - Sequence for Test Patterns Generation Improvement

In the paper some modification of the LFSR sequences was proposed. Modified, predictable test pattern sequences are estimated on the basis of spectral analysis of the past sequences. Experimental results show that the number of the test vectors can be significantly reduced if classical LFSR register approach by spectral analysis will be aided. Obtained results of benchmarks circuits testing demonstrate the effectiveness of the proposed technique in which high fault coverage was achieved.