| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and apparatus for analog to digital conversion suitable to an automatic test device. SOLUTION: The method which converts an analog signal S(t) into a digital representation comprises a 1st step for generating N time-varying reference signals, where N is an integer equal to or greater than one, 2nd and 3rd steps for comparing an amplitude s(t) of the analog signal S(t) to an amplitude r(t) of each of reference signals R(t) to determine whether the analog signal amplitude s(t) is greater than, equal to, or less than the reference signal amplitudes r(t), and 4th and 5th steps for producing a timestamp each time the analog signal and the reference signal amplitudes s(t) and r(t) are equal, where the timestamp is a record of an amplitude equal-value event and the digital representation is a timestamp group.
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