TECHNIQUE FOR REDUCING THE MASKING PROBABILITY IN TRANSITION COUNT TESTING

A two-phase technique-to reduce-the masking probability of transition count testing is presented. The technique can reduce the probability o f masking by 50% compared with the traditional transition count testin g scheme. The first phase of the technique is identical to the traditi onal scheme. In the second-phase, the last bit of a response pattern i s stored and compared with that of the reference pattern. Thus, the pr oposed technique requires only minimal overhead to reduce the masking probability.