JP2005285311A5 - - Google Patents

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Publication number
JP2005285311A5
JP2005285311A5 JP2005065512A JP2005065512A JP2005285311A5 JP 2005285311 A5 JP2005285311 A5 JP 2005285311A5 JP 2005065512 A JP2005065512 A JP 2005065512A JP 2005065512 A JP2005065512 A JP 2005065512A JP 2005285311 A5 JP2005285311 A5 JP 2005285311A5
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JP
Japan
Prior art keywords
signal
code
providing
adc
data
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
JP2005065512A
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English (en)
Japanese (ja)
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JP2005285311A (ja
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Publication date
Priority claimed from US10/811,523 external-priority patent/US7027243B2/en
Application filed filed Critical
Publication of JP2005285311A publication Critical patent/JP2005285311A/ja
Publication of JP2005285311A5 publication Critical patent/JP2005285311A5/ja
Withdrawn legal-status Critical Current

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JP2005065512A 2004-03-29 2005-03-09 ヘッド振幅特性付け装置 Withdrawn JP2005285311A (ja)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10/811,523 US7027243B2 (en) 2004-03-29 2004-03-29 Apparatus for providing head amplitude characterization

Publications (2)

Publication Number Publication Date
JP2005285311A JP2005285311A (ja) 2005-10-13
JP2005285311A5 true JP2005285311A5 (https=) 2008-04-17

Family

ID=34989520

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2005065512A Withdrawn JP2005285311A (ja) 2004-03-29 2005-03-09 ヘッド振幅特性付け装置

Country Status (4)

Country Link
US (1) US7027243B2 (https=)
JP (1) JP2005285311A (https=)
KR (1) KR20060044791A (https=)
CN (1) CN100409347C (https=)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7227709B1 (en) 2006-01-23 2007-06-05 Hitachi Global Storage Technologies Netherlands B.V. System and method for providing head amplitude characterization
KR100736409B1 (ko) * 2006-06-26 2007-07-09 삼성전자주식회사 리드/라이트 채널회로, 및 이를 구비하는 하드 디스크드라이브
US8230313B2 (en) * 2008-08-11 2012-07-24 Texas Instruments Incorporated Low-power predecoding based viterbi decoding
US8223448B1 (en) 2010-04-22 2012-07-17 Western Digital Technologies, Inc. Disk drive calibrating preamp for servo sectors and data sectors
US8767326B2 (en) 2012-08-28 2014-07-01 Industrial Business Machines Corporation Dynamically controlling magnetoresistive bias
CN105706012B (zh) * 2013-11-14 2019-02-26 株式会社富士 伺服控制器
CN112187200B (zh) * 2020-10-15 2022-10-14 上海麦歌恩微电子股份有限公司 自动增益控制系统及方法

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4635142A (en) * 1983-11-22 1987-01-06 Storage Technology Corporation Amplitude sensor with adaptive threshold generation
US5341249A (en) * 1992-08-27 1994-08-23 Quantum Corporation Disk drive using PRML class IV sampling data detection with digital adaptive equalization
US5668678B1 (en) * 1994-11-14 2000-11-28 Cirrus Logic Inc Detecting servo data and servo bursts from discrete time samples of an analog read signal in a sampled amplitude read channel
WO1997007501A1 (en) * 1995-08-18 1997-02-27 Quantum Corporation Control loops for low power, high speed prml sampling data detection channel
US5737342A (en) * 1996-05-31 1998-04-07 Quantum Corporation Method for in-chip testing of digital circuits of a synchronously sampled data detection channel
SG52990A1 (en) * 1996-07-09 1998-09-28 Ibm Improvements to radial self-propagation pattern generation for disk file servowriting
US6282038B1 (en) * 1999-02-19 2001-08-28 International Business Machines Corporation Variable gain amplifier with temperature compensation for use in a disk drive system
IT1313390B1 (it) * 1999-07-16 2002-07-23 St Microelectronics Srl Metodo di ottimizzazione dei parametri di un filtro passabasso di pre-equalizzazione per canale di lettura.
US6252528B1 (en) * 1999-08-20 2001-06-26 Conexant Systems, Inc. System and method for variable gain coder-decoder
KR100561798B1 (ko) * 1999-11-22 2006-03-21 시게이트 테크놀로지 엘엘씨 결함 임계값 검출기 및 비터비 이득을 사용하는 데이터 에러 복구 방법 및 장치
US6429988B1 (en) * 2000-09-22 2002-08-06 International Business Machines Corporation System and method for calibrating a corner frequency of a tunable filter using ADC code difference method
JP4642264B2 (ja) * 2001-04-03 2011-03-02 株式会社日立国際電気 スペクトル拡散通信用相関回路
US6519103B2 (en) * 2001-05-25 2003-02-11 Infineon Technologies Ag View DAC feedback inside analog front circuit
US6661590B2 (en) * 2001-05-25 2003-12-09 Infineon Technologies Ag Efficient analog front end for a read/write channel of a hard disk drive running from a highly regulated power supply

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