AT-SPEED TEST IS NOT NECESSARILY AN AC TEST

Abstract

In many circles at-speed test is synonymous to AC test. The object of this paper is to root out this misconception. In order to achieve an effective AC test special attention must be paid to the way the patterns are generated. The AC strength is a measure that allows assessing how well a pattern generator can serve in applying AC test vectors to the logic. Generators with high AC strengths tend to perform better than generators with low AC strengths.