JPS5665315A - Magnetic recording and inspecting system - Google Patents

Magnetic recording and inspecting system

Info

Publication number
JPS5665315A
JPS5665315A JP14249579A JP14249579A JPS5665315A JP S5665315 A JPS5665315 A JP S5665315A JP 14249579 A JP14249579 A JP 14249579A JP 14249579 A JP14249579 A JP 14249579A JP S5665315 A JPS5665315 A JP S5665315A
Authority
JP
Japan
Prior art keywords
error
output
magnetic
reproducing head
signal
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
JP14249579A
Other languages
Japanese (ja)
Inventor
Hideo Tanaka
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP14249579A priority Critical patent/JPS5665315A/en
Publication of JPS5665315A publication Critical patent/JPS5665315A/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

Landscapes

  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Measuring Magnetic Variables (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)

Abstract

PURPOSE:To obtain an inspection system adapted to a magnetic recording medium of high frequency and high recording density, by using a magnetic resistance effect element of a ferromagnetic thin film as a reproducing head. CONSTITUTION:A signal reproduced by the reproducing head of a nonbias magnetic-field magnetic resistance effect element of recording and reproducing head 1 from magnetic disk 2, driven by motor 3, to be measured is amplified 5 and the output bipolar signal of it is integrated 8. By way of mean-value detecting memory part 9 that detects and stores the mean value of an envelope from integral network part 8, it is supplied to error-comparison-level setting circuit part 10 to set an error comparison level, and this error comparison level signal 105 and output signal 102 of regenerative amplifier 5 are compared mutually; and its output is made into pulses by comparing circuit part 11, the absence part of a pulse in the output pulse string is error-processed by detecting circuit 12, and control part 13 performs error position detection, statistics processing and control.
JP14249579A 1979-11-02 1979-11-02 Magnetic recording and inspecting system Pending JPS5665315A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14249579A JPS5665315A (en) 1979-11-02 1979-11-02 Magnetic recording and inspecting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14249579A JPS5665315A (en) 1979-11-02 1979-11-02 Magnetic recording and inspecting system

Publications (1)

Publication Number Publication Date
JPS5665315A true JPS5665315A (en) 1981-06-03

Family

ID=15316650

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14249579A Pending JPS5665315A (en) 1979-11-02 1979-11-02 Magnetic recording and inspecting system

Country Status (1)

Country Link
JP (1) JPS5665315A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58200654A (en) * 1982-05-18 1983-11-22 Nec Corp Communication device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5236691A (en) * 1975-07-09 1977-03-22 Parcor Production of tetrahydroo thieno *3*22e* and *2*33c* pyridine derivative

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5236691A (en) * 1975-07-09 1977-03-22 Parcor Production of tetrahydroo thieno *3*22e* and *2*33c* pyridine derivative

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58200654A (en) * 1982-05-18 1983-11-22 Nec Corp Communication device

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