A New Built-in TPG Based on Berlekamp-Massey Algorithm

In this work, a new method to design a mixedmode Test Pattern Generator (TPG) based only on a simple and single Linear Feedback Shift Register (LFSR) is described. Such an LFSR is synthesized by Berlekamp–Massey algorithm (BMA) and is capable of generating pre-computed deterministic test patterns which detect the hard-to-detect faults of the circuit. Moreover, the LFSR generates residual patterns which are sufficient to detect the remaining easy-to-detect faults. In this way, the BMA-designed LFSR is a mixedmode TPG which achieves total fault coverage with short testing length and low hardware overhead compared with previous schemes according to the experimental results.