Method and related apparatus for deriving a tracking error...

Details Method and related apparatus for deriving a tracking error... Method and related apparatus for deriving a tracking error...

2007-03-06

2007-03-06

Wellington, Andrea (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S044340

Reexamination Certificate

active

10707606

ABSTRACT:
A method for deriving a tracking error signal based on a first analog detection signal and a second analog detection signal. The method includes summing the first analog detection signal and the second analog detection signal to generate an analog sum signal. An analog delay device is utilized to delay the analog sum signal to be a delay signal. The delay signal is digitalized into a digital delay signal. The first analog detection signal and the second analog detection signal are respectively transformed into a first digital detection signal and a second digital detect signal. The tracking error signal is then generated utilizing a comparing operation among the digital delay signal, the first digital detect signal, and the first digital detect signal.

REFERENCES:
patent: 6134197 (2000-10-01), Ishibashi et al.
patent: 6266305 (2001-07-01), Buchler
patent: 2004/0151089 (2004-08-01), Buchler et al.
patent: 2004/0160866 (2004-08-01), Huang et al.
patent: 2005/0015687 (2005-01-01), Lai et al.

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