CA1042546A - Method and apparatus for controlling the risetime of a digital magnetic recording waveform - Google Patents

Method and apparatus for controlling the risetime of a digital magnetic recording waveform

Info

Publication number
CA1042546A
CA1042546A CA218,277A CA218277A CA1042546A CA 1042546 A CA1042546 A CA 1042546A CA 218277 A CA218277 A CA 218277A CA 1042546 A CA1042546 A CA 1042546A
Authority
CA
Canada
Prior art keywords
current
recording
magnetic
period
risetime
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.)
Expired
Application number
CA218,277A
Other languages
English (en)
French (fr)
Other versions
CA218277S (en
Inventor
Richard C. Schneider
Lawrence Viele (Jr.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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 International Business Machines Corp filed Critical International Business Machines Corp
Application granted granted Critical
Publication of CA1042546A publication Critical patent/CA1042546A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
    • G11B5/09—Digital recording

Landscapes

  • Digital Magnetic Recording (AREA)
CA218,277A 1974-03-11 1975-01-17 Method and apparatus for controlling the risetime of a digital magnetic recording waveform Expired CA1042546A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US449864A US3869714A (en) 1974-03-11 1974-03-11 Method and apparatus for controlling the risetime of a digital magnetic recording waveform

Publications (1)

Publication Number Publication Date
CA1042546A true CA1042546A (en) 1978-11-14

Family

ID=23785792

Family Applications (1)

Application Number Title Priority Date Filing Date
CA218,277A Expired CA1042546A (en) 1974-03-11 1975-01-17 Method and apparatus for controlling the risetime of a digital magnetic recording waveform

Country Status (7)

Country Link
US (1) US3869714A (US20090182215A1-20090716-C00004.png)
JP (1) JPS5942370B2 (US20090182215A1-20090716-C00004.png)
CA (1) CA1042546A (US20090182215A1-20090716-C00004.png)
DE (1) DE2509952C2 (US20090182215A1-20090716-C00004.png)
FR (1) FR2273337B1 (US20090182215A1-20090716-C00004.png)
GB (1) GB1490752A (US20090182215A1-20090716-C00004.png)
IT (1) IT1031233B (US20090182215A1-20090716-C00004.png)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5262055A (en) * 1975-11-15 1977-05-23 Seietsu Koseki Wristwatch equipped with thermometer
US4167761A (en) * 1978-04-03 1979-09-11 Sperry Rand Corporation Precedent and subsequent minor transitions to alleviate pulse crowding
JPS56165910A (en) * 1980-05-24 1981-12-19 Sony Corp Recording method of binary signal
JPS57147112A (en) * 1981-03-05 1982-09-10 Aisin Seiki Co Ltd Binary data recorder
JPH0332850Y2 (US20090182215A1-20090716-C00004.png) * 1986-10-25 1991-07-11
KR0166157B1 (ko) * 1995-12-27 1999-03-20 김광호 자기 기록장치의 기록전류 제어회로 및 방법

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3067422A (en) * 1958-12-24 1962-12-04 Ibm Phase distortion correction for high density magnetic recording
US3159840A (en) * 1960-11-14 1964-12-01 Honeywell Inc Pattern sensitivity compensation in high pulse density recording
JPS50104622A (US20090182215A1-20090716-C00004.png) * 1974-01-21 1975-08-18

Also Published As

Publication number Publication date
FR2273337A1 (US20090182215A1-20090716-C00004.png) 1975-12-26
DE2509952A1 (de) 1975-09-18
JPS50125711A (US20090182215A1-20090716-C00004.png) 1975-10-03
FR2273337B1 (US20090182215A1-20090716-C00004.png) 1976-12-31
GB1490752A (en) 1977-11-02
JPS5942370B2 (ja) 1984-10-15
DE2509952C2 (de) 1983-08-18
IT1031233B (it) 1979-04-30
US3869714A (en) 1975-03-04

Similar Documents

Publication Publication Date Title
US20060221481A1 (en) Write precompensation method for perpendicular magnetic recording
US4423451A (en) Thin film magnetic head having disparate poles for pulse asymmetry compensation
JPS606900Y2 (ja) 磁気データ記録装置
US4525753A (en) Circuit arrangement and method for magnetic recording/reproducing
CA1042546A (en) Method and apparatus for controlling the risetime of a digital magnetic recording waveform
US20020015247A1 (en) High resolution wide range write precompensation
EP1490866B1 (en) Disk drive writer waveform induced precompensation
US4167761A (en) Precedent and subsequent minor transitions to alleviate pulse crowding
JPH07105118B2 (ja) スレッショルドトラッキング方式
US4323932A (en) Readback pulse compensator
US6288859B1 (en) Device for write compensation in magnetic-media recording
Jacoby High density recording with write current shaping
US5255133A (en) Waveform processing system and method for recording digital information
JP3106541B2 (ja) 磁気ヘッド駆動回路
US3614758A (en) Method and apparatus for saturation-type digital magnetic recording
US5204788A (en) Digital magnetic recording and reproducing circuit for suppressing generation of asymmetry
US3409900A (en) Gap scatter correction apparatus
Shew High-density magnetic head design for noncontact recording
Behr et al. Technique for reducing effects of pulse crowding in magnetic recording
JP3087860B2 (ja) 磁気記憶装置の記録回路
Thapar et al. Magnetic recording system-an overview
KR940005796B1 (ko) 자기 기록 재생장치
Fuchigami et al. Recording Characteristics on Pulse Train Write Current Waveform
Graham Data detection methods vs head resolution in digital magnetic recording
KR19980701691A (ko) 자기기록매체와 상기 기록매체 상의 트랙에 디지탈 정보신호 를 기록하는 장치의 결합구조