TW200639832A - Self-adaptive filter circuit - Google Patents

Self-adaptive filter circuit

Info

Publication number
TW200639832A
TW200639832A TW094142201A TW94142201A TW200639832A TW 200639832 A TW200639832 A TW 200639832A TW 094142201 A TW094142201 A TW 094142201A TW 94142201 A TW94142201 A TW 94142201A TW 200639832 A TW200639832 A TW 200639832A
Authority
TW
Taiwan
Prior art keywords
marks
transfer function
frequency
impedance element
analog
Prior art date
Application number
TW094142201A
Other languages
Chinese (zh)
Inventor
Rain Zhang
Original Assignee
Koninkl Philips Electronics Nv
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 Koninkl Philips Electronics Nv filed Critical Koninkl Philips Electronics Nv
Publication of TW200639832A publication Critical patent/TW200639832A/en

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10046—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B2020/10935—Digital recording or reproducing wherein a time constraint must be met
    • G11B2020/10981—Recording or reproducing data when the data rate or the relative speed between record carrier and transducer is variable
    • G11B2020/1099—Recording or reproducing data when the data rate or the relative speed between record carrier and transducer is variable wherein a disc is spun at a variable speed
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
    • G11B2020/1264—Formatting, e.g. arrangement of data block or words on the record carriers wherein the formatting concerns a specific kind of data
    • G11B2020/1288—Formatting by padding empty spaces with dummy data, e.g. writing zeroes or random data when de-icing optical discs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
    • G11B2220/2537—Optical discs
    • G11B2220/2541—Blu-ray discs; Blue laser DVR discs

Abstract

An equalizer device is for adaptively filtering an analog input signal from an optical head for scanning marks on a storage medium. The device has an amplifying element (Q4) coupled to an analog filtering circuit for forming a frequency dependent transfer function. The transfer function is adjusted to different scanning speeds of the marks. Thereto the analog filtering circuit has a frequency dependent impedance element (CB1,CB2) and a controllable impedance element (62,63) dependent on a control signal. Furthermore a controller (61) is included, for example a frequency to voltage converter, for controlling the controllable impedance element by generating the control signal in dependence of a frequency content of the analog input signal. Advantageously the transfer function of the equalizer is self adaptive to the scanning speed of the marks on the medium.
TW094142201A 2004-12-03 2005-11-30 Self-adaptive filter circuit TW200639832A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04106267 2004-12-03

Publications (1)

Publication Number Publication Date
TW200639832A true TW200639832A (en) 2006-11-16

Family

ID=36091323

Family Applications (1)

Application Number Title Priority Date Filing Date
TW094142201A TW200639832A (en) 2004-12-03 2005-11-30 Self-adaptive filter circuit

Country Status (2)

Country Link
TW (1) TW200639832A (en)
WO (1) WO2006059273A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI393040B (en) * 2009-03-06 2013-04-11 Tangent Microelectromechanics Corp An capacitor sensing circuit architecture of touch panel
TWI397906B (en) * 2009-11-27 2013-06-01 Sunplus Technology Co Ltd Filter and filtering method thereof

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103616848B (en) * 2013-12-04 2016-08-17 固高科技(深圳)有限公司 Improve filtering method and the system of the sef-adapting filter of velocity feed forward

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3089509B2 (en) * 1992-06-10 2000-09-18 ソニー株式会社 Optical disc playback device
JP3287210B2 (en) * 1995-04-06 2002-06-04 ソニー株式会社 Optical recording medium playback device
US5671098A (en) * 1995-06-01 1997-09-23 Maxtor Corporation Adaptive preamplifier for resonance tuning useful in a disk drive
JP3436631B2 (en) * 1996-02-22 2003-08-11 富士通株式会社 Optical transceiver circuit
JP2002251844A (en) * 2001-02-21 2002-09-06 Mitsumi Electric Co Ltd Optical disk unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI393040B (en) * 2009-03-06 2013-04-11 Tangent Microelectromechanics Corp An capacitor sensing circuit architecture of touch panel
TWI397906B (en) * 2009-11-27 2013-06-01 Sunplus Technology Co Ltd Filter and filtering method thereof

Also Published As

Publication number Publication date
WO2006059273A1 (en) 2006-06-08

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