| 摘要 |
A pulse train generating circuit has a pattern generating circuit 10 that includes a memory 9 to store pattern data and reference voltage data, and synchronously provides the pattern data and the reference voltage data from the respective terminals A and B. A digital to analog converter 14 converts the reference voltage data into a reference voltage signal. A LPF 12 slopes the pulse edges of the pattern data. A comparator 16 compares the reference voltage and the output of the LFP 12 to produce a pulse train of which edge positions are changed. The resulting jittered pulse train is derived from a reference pulse train.
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