Patent ID: 6741953
Filing Date: 2004-05-25
Classification: G01R

Abstract:
A data acquisition unit for storing input data and time tags as sampled by way of an input clock, the data acquisition unit comprising:a time tag generator configured to generate a series of time tags and overflow flags, the overflow flags indicating when the series of time tags restart from an initial value; a data sampler configured to temporarily store a sample of the input data, along with the time tag being generated by the time tag generator at the time the sample of the input data is stored, for each pulse of the input clock; a data filter configured to selectively capture the sample of the input data and the time tag from the data sampler upon either a predetermined portion of the sample of the input data matching a predetermined value, or one of the overflow flags being active; and a data storage unit configured to store each of the selectively captured samples of the input data and the time tags from the data filter.