Abstract: A method for testing an analog-to-digital converter (ADC) includes applying ramps to the input of the converter, and classifying the digital codes produced by the converter according to a histogram. The converter is declared operational as soon as all the classes of the histogram have reached a minimum count. The minimum count may be equal to 1 in practice. The converter is declared defective if any class does not reach the minimum count before expiry of a time interval.

Abstract: The present invention relates to a method for determining a characteristic of a periodic digital signal, including the steps of: defining a measurement period such that the ratio between the measurement period and the period of the digital signal is a ratio of integers; selecting a set of measurement periods in which the digital signal has substantially the same phase; defining a measurement time having a same position in each measurement period of the set; storing the value of the digital signal at each measurement time; shifting the measurement time by a predetermined pitch lower than one measurement period; repeating the two preceding steps until the measurement time of each measurement period has scanned a predetermined portion of the measurement period; and analyzing the succession of the noted values.