Multimode filter

Details Multimode filter Multimode filter

2005-05-17

2005-05-17

Hindi, Nabil (Department: 2655)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S047300, C369S047380

Reexamination Certificate

active

06894956

ABSTRACT:
A multimode filter in an optical storage device is used for filtering an error signal and outputting a frequency signal. The multimode filter comprises a CLV and CAV mode filter and a switch. The CLV mode filter is used for filtering the error signal and extracting a narrow bandwidth signal, whereas the CAV mode filter is used for filtering the error signal and extracting a wide bandwidth signal. The switch is used for selecting either the CLV mode filter or the CAV mode filter according to the recording mode of the optical storage device.

REFERENCES:
patent: 6055219 (2000-04-01), Ho et al.
patent: 6088315 (2000-07-01), Ando
patent: 6212143 (2001-04-01), Teshirogi et al.

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