JPS5534304A - Magnetic disc reproducing method - Google Patents

Magnetic disc reproducing method

Info

Publication number
JPS5534304A
JPS5534304A JP10548178A JP10548178A JPS5534304A JP S5534304 A JPS5534304 A JP S5534304A JP 10548178 A JP10548178 A JP 10548178A JP 10548178 A JP10548178 A JP 10548178A JP S5534304 A JPS5534304 A JP S5534304A
Authority
JP
Japan
Prior art keywords
wave shape
partial response
reliablility
inputted
amplifier
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.)
Pending
Application number
JP10548178A
Other languages
Japanese (ja)
Inventor
Hitoshi Takagi
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP10548178A priority Critical patent/JPS5534304A/en
Publication of JPS5534304A publication Critical patent/JPS5534304A/en
Pending 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
    • G11B5/027—Analogue recording
    • G11B5/035—Equalising

Landscapes

  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Dc Digital Transmission (AREA)
  • Digital Magnetic Recording (AREA)

Abstract

PURPOSE:To variably control the characteristics of wave shape equalizing filter in accordance with the positional information of the magnetic head, thereby enhance the reliablility of the double adjustment of the partial response system. CONSTITUTION:The isolated reproducing wave signal from the reproducing head is inputted through the delay line 31 and the track position signal C1 from the servo head is inputted. By these signals, interest of the respective amplifiers of the amplifier 34 is controlled, and the automatic equalizing control is carried out in such a manner that the amplitude characteristic is equalized every bit cell time. The respective outputs of the amplifier 34 is next inpressed into the adder 35 to obtain the correct partial response wave shape. Thus, since the characteristic property of the wave shape equalizing filter is most referably set in accordance with the track positional information, the precise partial response wave shape can be obtained inrrespective of the inner periphery or the outer periphery of the disc, the error in equalization influence is eliminated and the reliablility of the double adjustment can be enhanced.
JP10548178A 1978-08-31 1978-08-31 Magnetic disc reproducing method Pending JPS5534304A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10548178A JPS5534304A (en) 1978-08-31 1978-08-31 Magnetic disc reproducing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10548178A JPS5534304A (en) 1978-08-31 1978-08-31 Magnetic disc reproducing method

Publications (1)

Publication Number Publication Date
JPS5534304A true JPS5534304A (en) 1980-03-10

Family

ID=14408770

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10548178A Pending JPS5534304A (en) 1978-08-31 1978-08-31 Magnetic disc reproducing method

Country Status (1)

Country Link
JP (1) JPS5534304A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58182114A (en) * 1982-04-16 1983-10-25 Hitachi Ltd Waveform equalizing circuit
JPS59167811A (en) * 1983-03-14 1984-09-21 Nec Corp Magnetic disk device
JPS59203208A (en) * 1983-04-30 1984-11-17 Matsushita Electric Ind Co Ltd Magnetic reproducing device
JPS6070552A (en) * 1983-09-27 1985-04-22 Trio Kenwood Corp Magnetic recording and reproducing system
JPH02312018A (en) * 1989-05-29 1990-12-27 Nec Corp Optical recording and reproducing system
US5642381A (en) * 1993-04-26 1997-06-24 Kabushiki Kaisha Toshiba Signal equalizer

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58182114A (en) * 1982-04-16 1983-10-25 Hitachi Ltd Waveform equalizing circuit
JPS59167811A (en) * 1983-03-14 1984-09-21 Nec Corp Magnetic disk device
JPS59203208A (en) * 1983-04-30 1984-11-17 Matsushita Electric Ind Co Ltd Magnetic reproducing device
JPS6070552A (en) * 1983-09-27 1985-04-22 Trio Kenwood Corp Magnetic recording and reproducing system
JPH02312018A (en) * 1989-05-29 1990-12-27 Nec Corp Optical recording and reproducing system
US5642381A (en) * 1993-04-26 1997-06-24 Kabushiki Kaisha Toshiba Signal equalizer
US5835531A (en) * 1993-04-26 1998-11-10 Kabushiki Kaisha Toshiba Signal equalizer

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