JPS5798103A - Regenerative amplifying circuit for magnetic reluctance effective type magnetic head - Google Patents

Regenerative amplifying circuit for magnetic reluctance effective type magnetic head

Info

Publication number
JPS5798103A
JPS5798103A JP55173261A JP17326180A JPS5798103A JP S5798103 A JPS5798103 A JP S5798103A JP 55173261 A JP55173261 A JP 55173261A JP 17326180 A JP17326180 A JP 17326180A JP S5798103 A JPS5798103 A JP S5798103A
Authority
JP
Japan
Prior art keywords
magnetic
magnetic head
reluctance
temperature compensation
voltage
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
JP55173261A
Other languages
Japanese (ja)
Other versions
JPH0350322B2 (en
Inventor
Takaharu Noguchi
Takao Arai
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP55173261A priority Critical patent/JPS5798103A/en
Priority to EP81109854A priority patent/EP0053343A1/en
Priority to US06/324,674 priority patent/US4492997A/en
Publication of JPS5798103A publication Critical patent/JPS5798103A/en
Publication of JPH0350322B2 publication Critical patent/JPH0350322B2/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
    • G11B5/3903—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 using magnetic thin film layers or their effects, the films being part of integrated structures
    • G11B5/3906—Details related to the use of magnetic thin film layers or to their effects
    • G11B5/3945—Heads comprising more than one sensitive element
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/24—Signal processing not specific to the method of recording or reproducing; Circuits therefor for reducing noise
    • 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

Landscapes

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

Abstract

PURPOSE:To reduce noise and to maintain a sufficients S/N ratio in a regenerative amplifier circuit including a magnetic reluctance effective element, by employing a common circuit through which amplification of the regenerative head and supply of driving current can be achieved. CONSTITUTION:A magnetic reluctance effective element head 10 and a magnetic reclutance effective element 25 for temperature compensation having the same temperature reluctance characteristics are provided. If the gain of an opened loop of a differential amplifier 12 is sufficiently rised relative to the gain of a closed loop, a current is supplied to the magnetic head 10 from an output of the differential amplifier 12 through a resistance of the temperature compensation element 25 so that the voltage at the junction of the resistance of a temperature compensation element and the magnetic head 10 is equal to the voltage at the junction of resistances 27 and 28. The reluctance is varied by an external magnetic field applied to the magnetic head 10. The output voltage proportional to the variation of resistance of the magnetic head is obtained at both terminals of resistance of the temperature compensation element so that the voltage at the junction of the temperature compensation element 25 and a magnetic head 10, is equal to the voltage at the junction of resistors 27 and 28.
JP55173261A 1980-11-28 1980-12-10 Regenerative amplifying circuit for magnetic reluctance effective type magnetic head Granted JPS5798103A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP55173261A JPS5798103A (en) 1980-12-10 1980-12-10 Regenerative amplifying circuit for magnetic reluctance effective type magnetic head
EP81109854A EP0053343A1 (en) 1980-11-28 1981-11-24 Reproducing and amplifying circuit for magnetoresistive head
US06/324,674 US4492997A (en) 1980-11-28 1981-11-24 Reproducing and amplifying circuit for magnetoresistive head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55173261A JPS5798103A (en) 1980-12-10 1980-12-10 Regenerative amplifying circuit for magnetic reluctance effective type magnetic head

Publications (2)

Publication Number Publication Date
JPS5798103A true JPS5798103A (en) 1982-06-18
JPH0350322B2 JPH0350322B2 (en) 1991-08-01

Family

ID=15957166

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55173261A Granted JPS5798103A (en) 1980-11-28 1980-12-10 Regenerative amplifying circuit for magnetic reluctance effective type magnetic head

Country Status (1)

Country Link
JP (1) JPS5798103A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61237062A (en) * 1985-04-12 1986-10-22 ローベルト・ボツシユ・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング Integrated revolution-number sensor with magneto-sensitive sensor resistor

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5153843A (en) * 1974-11-06 1976-05-12 Nippon Kokan Kk KYORISOKUTEIHOHO
JPS551698A (en) * 1978-06-19 1980-01-08 Philips Nv Magnetic reading head

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5153843A (en) * 1974-11-06 1976-05-12 Nippon Kokan Kk KYORISOKUTEIHOHO
JPS551698A (en) * 1978-06-19 1980-01-08 Philips Nv Magnetic reading head

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61237062A (en) * 1985-04-12 1986-10-22 ローベルト・ボツシユ・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング Integrated revolution-number sensor with magneto-sensitive sensor resistor

Also Published As

Publication number Publication date
JPH0350322B2 (en) 1991-08-01

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