| 摘要 |
<p>A method for measuring channel-to-channel skew or phase difference in an electronic system of the type having a plurality of input channels which are sampled by sampling pulses having a frequency fo and a period Po. The sampling pulses at each input channel are first mixed with a reference signal having a frequency fr and a period Pr that differ from the frequency and period of the sampling pulses. The mixing produces a beat signal at each input channel. A quantity termed ''effective measurement interval'' which is equal to the difference of the periods of the sampling pulses, Po, and the reference signal, Pr, is computed. A quantity termed ''apparent skew'' which is equal to the number of periods Po of the sampling pulses which represents the skew or phase difference between the beat signals is also determined. Finally, skew of phase difference of the sampling pulses is computed by multiplying the ''effective measurement interval'' by the ''apparent skew''.</p> |
