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JPS5774807A - Reproducing method of magnetic recording signal - Google Patents

Reproducing method of magnetic recording signal

Info

Publication number
JPS5774807A
JPS5774807A JP15064580A JP15064580A JPS5774807A JP S5774807 A JPS5774807 A JP S5774807A JP 15064580 A JP15064580 A JP 15064580A JP 15064580 A JP15064580 A JP 15064580A JP S5774807 A JPS5774807 A JP S5774807A
Authority
JP
Japan
Prior art keywords
head
signal
frequency
variation
magnetic field
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.)
Granted
Application number
JP15064580A
Other languages
Japanese (ja)
Other versions
JPH0123844B2 (en
Inventor
Takeshi Sawada
Hiroshi Yoneda
Akira Niimi
Hirotsugu Takagi
Shuzo Abiko
Hiroichi Goto
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.)
Canon Inc
Canon Electronics Inc
Original Assignee
Canon Inc
Canon Electronics Inc
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 Canon Inc, Canon Electronics Inc filed Critical Canon Inc
Priority to JP15064580A priority Critical patent/JPS5774807A/en
Publication of JPS5774807A publication Critical patent/JPS5774807A/en
Publication of JPH0123844B2 publication Critical patent/JPH0123844B2/ja
Granted 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
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
    • G11B5/39—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Magnetic Heads (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)

Abstract

PURPOSE:To make a device small-sized, by detecting a variation of amplitude or frequency by a signal magnetic field by use of a magnetic reluctance effect type magnetic head whose detecting current is AC, and reducing a decrease of a reproducing output, in a domestic VTR device, etc. CONSTITUTION:An MR head 20 constituted by use of a magnetic reluctance effect element is connected to one side of an AC bridge circuit 22 to which an AC signal of an AC oscillator 23 is applied, through a rotary transformer 21. To a part of the circut 22, an element 25 constituted of an inductance and a resistance for balancing the bridge is installed. Oscillation frequency of the circuit 23 is selected to about 12MHz since frequency of a magnetic field applied to the head 20 is 2-6MHz. According to such a constitution, a variation of a magnetic field applied to an element of the head 20 executes an amplitude modulation as a variation of AC impedance, and a reproducing signal with fidelity according to a recording signal is outputted from an amplifier 24. Since the amplitude or the frequency modulation is detected in this way, a decrease of a reproducing output is reduced, and a device is small-sized.
JP15064580A 1980-10-29 1980-10-29 Reproducing method of magnetic recording signal Granted JPS5774807A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15064580A JPS5774807A (en) 1980-10-29 1980-10-29 Reproducing method of magnetic recording signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15064580A JPS5774807A (en) 1980-10-29 1980-10-29 Reproducing method of magnetic recording signal

Publications (2)

Publication Number Publication Date
JPS5774807A true JPS5774807A (en) 1982-05-11
JPH0123844B2 JPH0123844B2 (en) 1989-05-09

Family

ID=15501372

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15064580A Granted JPS5774807A (en) 1980-10-29 1980-10-29 Reproducing method of magnetic recording signal

Country Status (1)

Country Link
JP (1) JPS5774807A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6243240B1 (en) 1996-12-17 2001-06-05 Sony Corporation Non-contact type transmission device and rotary magnetic head unit having the non-contact type transmission device
JP2010076540A (en) * 2008-09-25 2010-04-08 Mitsubishi Steel Mfg Co Ltd Hollow stabilizer

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55129910A (en) * 1979-03-27 1980-10-08 Sharp Corp Magnetic signal reproducing device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55129910A (en) * 1979-03-27 1980-10-08 Sharp Corp Magnetic signal reproducing device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6243240B1 (en) 1996-12-17 2001-06-05 Sony Corporation Non-contact type transmission device and rotary magnetic head unit having the non-contact type transmission device
JP2010076540A (en) * 2008-09-25 2010-04-08 Mitsubishi Steel Mfg Co Ltd Hollow stabilizer
US8490987B2 (en) 2008-09-25 2013-07-23 Mitsubishi Steel Mfg. Co., Ltd. Stabilizer bar

Also Published As

Publication number Publication date
JPH0123844B2 (en) 1989-05-09

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