TW200746099A - Wobble detection circuit and method for processing a wobble signal - Google Patents

Wobble detection circuit and method for processing a wobble signal

Info

Publication number
TW200746099A
TW200746099A TW096120111A TW96120111A TW200746099A TW 200746099 A TW200746099 A TW 200746099A TW 096120111 A TW096120111 A TW 096120111A TW 96120111 A TW96120111 A TW 96120111A TW 200746099 A TW200746099 A TW 200746099A
Authority
TW
Taiwan
Prior art keywords
wobble
signal
digital
analog
detection circuit
Prior art date
Application number
TW096120111A
Other languages
Chinese (zh)
Other versions
TWI338295B (en
Inventor
Yuh Cheng
Chih-Ching Chen
Chia-Wei Liao
Ming-Jiou Yu
Kuo-Jung Lan
Shu Hung Chou
Bing Yu Hsieh
Original Assignee
Mediatek Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mediatek Inc filed Critical Mediatek Inc
Publication of TW200746099A publication Critical patent/TW200746099A/en
Application granted granted Critical
Publication of TWI338295B publication Critical patent/TWI338295B/en

Links

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  • Optical Recording Or Reproduction (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

The invention provides a wobble detection circuit. An exemplary embodiment of the wobble detection circuit comprises an automatic gain control module, an analog to digital converter, a digital band pass filter, and a digital band pass filter. The automatic gain control module amplifies a first input signal and a second input signal detected by a pickup head to the same magnitude to obtain a first amplified signal and a second amplified signal. The adder then subtracts the second amplified signal from the first amplified signal to obtain an analog wobble signal. The analog to digital converter then converts the analog wobble signal to a first digital wobble signal. Finally, the digital band pass filter accepts frequency components of the first digital wobble signal within a pass band and rejects frequency components of the first digital wobble signal outside the pass band to obtain a second digital wobble signal.
TW96120111A 2006-06-05 2007-06-05 Wobble detection circuit amd method for processing a wobble signal TWI338295B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US81102306P 2006-06-05 2006-06-05

Publications (2)

Publication Number Publication Date
TW200746099A true TW200746099A (en) 2007-12-16
TWI338295B TWI338295B (en) 2011-03-01

Family

ID=38937764

Family Applications (1)

Application Number Title Priority Date Filing Date
TW96120111A TWI338295B (en) 2006-06-05 2007-06-05 Wobble detection circuit amd method for processing a wobble signal

Country Status (2)

Country Link
CN (1) CN100541620C (en)
TW (1) TWI338295B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI402827B (en) * 2008-09-18 2013-07-21 Renesas Electronics Corp Address detection circuit and address detection method
TWI476765B (en) * 2009-06-24 2015-03-11 Lsi Corp Systems and methods for hard disk drive data storage including reduced latency loop recovery

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8270266B2 (en) * 2008-04-17 2012-09-18 Mediatek Inc. Methods and devices for detecting wobbles on an optical disc

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI402827B (en) * 2008-09-18 2013-07-21 Renesas Electronics Corp Address detection circuit and address detection method
TWI476765B (en) * 2009-06-24 2015-03-11 Lsi Corp Systems and methods for hard disk drive data storage including reduced latency loop recovery

Also Published As

Publication number Publication date
CN100541620C (en) 2009-09-16
CN101086850A (en) 2007-12-12
TWI338295B (en) 2011-03-01

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Legal Events

Date Code Title Description
MM4A Annulment or lapse of patent due to non-payment of fees