TW200746099A - Wobble detection circuit and method for processing a wobble signal - Google Patents
Wobble detection circuit and method for processing a wobble signalInfo
- 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
Links
Landscapes
- 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.
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)
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)
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 |
-
2007
- 2007-06-05 CN CNB2007101096478A patent/CN100541620C/en active Active
- 2007-06-05 TW TW96120111A patent/TWI338295B/en not_active IP Right Cessation
Cited By (2)
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 |