Data recording device

Details Data recording device Data recording device

2008-01-15

2009-12-01

Wong, K. (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S077040

Reexamination Certificate

active

07626781

ABSTRACT:
Embodiments of the present invention provide a data recording device capable of achieving desired performance while increasing the convergence rate. According to one embodiment, in a data recording device, an update-width determination unit included in a setting updating unit determines an update-width of a set frequency f in a digital filter according to the size of a position error signal PES, and an update-width adjuster included in the setting updating unit changes the update-width of the set frequency f determined by the update-width determination unit according to the size of the set frequency f. Thus, while the convergence rate being kept properly, the set frequency f can precisely be converged on a frequency of a disturbance component.

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patent: 7466507 (2008-12-01), Fulkerson et al.
Kisaka “Frequency Chasing Peak Filter,” Papers of Technical Meeting on Industrial Instrumentation and Control, IEE Japan IIC-04:19-23(2004), abstract only.

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