JPS5577015A - Magnetic recording and reading circuit - Google Patents

Magnetic recording and reading circuit

Info

Publication number
JPS5577015A
JPS5577015A JP14882278A JP14882278A JPS5577015A JP S5577015 A JPS5577015 A JP S5577015A JP 14882278 A JP14882278 A JP 14882278A JP 14882278 A JP14882278 A JP 14882278A JP S5577015 A JPS5577015 A JP S5577015A
Authority
JP
Japan
Prior art keywords
reading circuit
coil
write
write current
magnetic recording
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
JP14882278A
Other languages
Japanese (ja)
Inventor
Sunao Nakamura
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 JP14882278A priority Critical patent/JPS5577015A/en
Publication of JPS5577015A publication Critical patent/JPS5577015A/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
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B15/12—Masking of heads; circuits for Selecting or switching of heads between operative and inoperative functions or between different operative functions or for selection between operative heads; Masking of beams, e.g. of light beams
    • G11B15/125—Masking of heads; circuits for Selecting or switching of heads between operative and inoperative functions or between different operative functions or for selection between operative heads; Masking of beams, e.g. of light beams conditioned by the operating function of the apparatus

Landscapes

  • Digital Magnetic Recording (AREA)
  • Electronic Switches (AREA)

Abstract

PURPOSE:To make high-speed write possible by preventing the pulse voltage, which is generated according to time change of a write current, from flowing to the reading circuit side at an information write time. CONSTITUTION:Base-grounded transistors Q5 and Q6 are inserted between magnetic head coil L and reading circuit R. During write current supply from writing circuit W to coil L, Q5 and Q6 are turned off to prevent the pulse voltage, which is generated according to time change of the write current generated in coil L, from being transferred to reading circuit R. Then, during read of the voltage induced in coil L, operations of Q5 and Q6 are switched to the saturation state to read information.
JP14882278A 1978-12-01 1978-12-01 Magnetic recording and reading circuit Pending JPS5577015A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14882278A JPS5577015A (en) 1978-12-01 1978-12-01 Magnetic recording and reading circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14882278A JPS5577015A (en) 1978-12-01 1978-12-01 Magnetic recording and reading circuit

Publications (1)

Publication Number Publication Date
JPS5577015A true JPS5577015A (en) 1980-06-10

Family

ID=15461487

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14882278A Pending JPS5577015A (en) 1978-12-01 1978-12-01 Magnetic recording and reading circuit

Country Status (1)

Country Link
JP (1) JPS5577015A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4675559A (en) * 1981-12-21 1987-06-23 International Business Machines Corporation Differential circuit having a high voltage switch
US5636074A (en) * 1990-11-27 1997-06-03 Sony Corporation Recording signal amplifier apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4675559A (en) * 1981-12-21 1987-06-23 International Business Machines Corporation Differential circuit having a high voltage switch
US5636074A (en) * 1990-11-27 1997-06-03 Sony Corporation Recording signal amplifier apparatus

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