JPS6457406A - Reading and writing circuit for magnetic disk memory - Google Patents

Reading and writing circuit for magnetic disk memory

Info

Publication number
JPS6457406A
JPS6457406A JP21282887A JP21282887A JPS6457406A JP S6457406 A JPS6457406 A JP S6457406A JP 21282887 A JP21282887 A JP 21282887A JP 21282887 A JP21282887 A JP 21282887A JP S6457406 A JPS6457406 A JP S6457406A
Authority
JP
Japan
Prior art keywords
boosting
voltage
reading
time
writing
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
JP21282887A
Other languages
Japanese (ja)
Inventor
Norihito Suzuki
Koichi Sato
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
Hitachi Information Technology Co Ltd
Original Assignee
Hitachi Ltd
Hitachi Communication Systems 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 Hitachi Ltd, Hitachi Communication Systems Inc filed Critical Hitachi Ltd
Priority to JP21282887A priority Critical patent/JPS6457406A/en
Publication of JPS6457406A publication Critical patent/JPS6457406A/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
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/02—Control of operating function, e.g. switching from recording to reproducing

Landscapes

  • Digital Magnetic Recording (AREA)

Abstract

PURPOSE:To attain a satisfactory writing performance and reading performance with a single power source by providing a boosting circuit to stop an action at the time of a reading mode and transferring the voltage in accordance with a boosting voltage to the common electrode of a magnetic head at the time of a writing mode. CONSTITUTION:For a boosting circuit BST, by a transistor Q17 to receive a pulse signal formed by an oscillation circuit OSC and execute a switching action, a coil L is driven, a back electromotive force to generate a coil is smoothed and a boosting voltage Vcc' boosted to a supply voltage Vcc or above is formed. At the time of a reading mode, by a control signal, the inverse of WG made into the high level, a boosting action is stopped at the time of the reading mode. A voltage in accordance with the boosting voltage is transferred to the common electrode of a magnetic head and made into a bias voltage for writing. Thus, even when a single power source is used, a satisfactory writing performance can be maintained and the satisfactory reading performance can be obtained.
JP21282887A 1987-08-28 1987-08-28 Reading and writing circuit for magnetic disk memory Pending JPS6457406A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21282887A JPS6457406A (en) 1987-08-28 1987-08-28 Reading and writing circuit for magnetic disk memory

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21282887A JPS6457406A (en) 1987-08-28 1987-08-28 Reading and writing circuit for magnetic disk memory

Publications (1)

Publication Number Publication Date
JPS6457406A true JPS6457406A (en) 1989-03-03

Family

ID=16629035

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21282887A Pending JPS6457406A (en) 1987-08-28 1987-08-28 Reading and writing circuit for magnetic disk memory

Country Status (1)

Country Link
JP (1) JPS6457406A (en)

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