Signal calibration and signal generation method

Details Signal calibration and signal generation method Signal calibration and signal generation method

2005-10-11

2005-10-11

Young, W. R. (Department: 2652)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S030130, C369S124150

Reexamination Certificate

active

06954408

ABSTRACT:
A radio frequency ripple zero crossing signal calibration method for an optical disk reader undergoing a track following to track seeking transition is disclosed. The method utilizes sampling to obtain radio frequency ripple peak level during a track seeking operation and radio frequency ripple DC level during a track following operation and using their differences as a calibrated value. Through the calibrated value, the radio frequency ripple zero crossing slice level is modified so that a correct radio frequency ripple zero crossing signal is obtained during a track following to track seeking transition. In a track following to seeking transition, this arrangement prevents distortion of the radio frequency ripple signal and corresponding drift in the radio frequency zero crossing signal that may lead to errors in computing moving speed and counting tracks of the pickup head. Hence, search capacity of the optical disk reader is improved and the pickup head is better controlled.

REFERENCES:
patent: 5251194 (1993-10-01), Yoshimoto et al.
patent: 5831951 (1998-11-01), Kamioka et al.
patent: 5982722 (1999-11-01), Hashimoto
patent: 6366549 (2002-04-01), Lee et al.
patent: 6526006 (2003-02-01), Yoshimi et al.
patent: 6728184 (2004-04-01), Chan
patent: 6735162 (2004-05-01), Armitage et al.

Affiliated with

Also associated with

Rating

Signal calibration and signal generation method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Signal calibration and signal generation method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Signal calibration and signal generation method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3467232