| 摘要 |
An error correction circuit (84, 80) for determining an error in rotational speed of a recordable disk (12) of a disk drive (10) includes a sinusoidal error calcuation portion (84) adapted to generate a true oscillation error signal, and a summation portion (46) adapted to combine the true oscillation error with a spindle error signal to generate a total error signal. The sinusoidal error calcuation portion (84) is adapted to generate a new true oscillation error based on the total error signal.
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