| 摘要 |
PURPOSE: To obtain a stable reproduced clock by performing the fast pull-in of a clock and reducing a jitter in a circuit provided with a function to reproduce the clock. CONSTITUTION: An inputted angle modulated wave is quantized by a phase quantizing means 2, and an eye pattern representing the change quantity of a phase in one symbol time can be obtained by a phase data delay means 3 and an arithmetic means 4. Plural detection values are set from the eye pattern, and timings to show the values are detected by a detecting means 5. The timing (A) requiring correction out of detected timings is corrected by delaying by a timing delay means 6, and AND with the timing (B) without requiring correction is taken, and the clock in which a fast operation can be performed and the jitter can be reduced is reproduced at such timing by a phase locked loop 8. |
