Patent ID: 7263150
Filing Date: 2007-08-28
Classification: G01R

Abstract:
1. A probability estimating apparatus for peak-to-peak values in clock skews among a plurality of clock signals under test, comprising: a clock skew estimator for estimating clock skew sequences among the plurality of clock signals under test; and a probability estimator for determining a generation probability of the peak-to-peak values in the clock skews among the plurality of clock signals under test based on the clock skew sequences from the clock skew estimator by applying Rayleigh distribution; wherein said clock signals under test have pulse waveforms, and wherein said probability estimator estimates the generation probability of the peak-to-peak value based on RMS (root mean square) values of the clock signals under test obtained by the clock skew estimator by applying ratios between the peak-to-peak value and the RMS values determined by the Rayleigh distribution.