JPS5758283A - Magnetic bubble memory device - Google Patents

Magnetic bubble memory device

Info

Publication number
JPS5758283A
JPS5758283A JP13168580A JP13168580A JPS5758283A JP S5758283 A JPS5758283 A JP S5758283A JP 13168580 A JP13168580 A JP 13168580A JP 13168580 A JP13168580 A JP 13168580A JP S5758283 A JPS5758283 A JP S5758283A
Authority
JP
Japan
Prior art keywords
magnetic field
time
revolving magnetic
coil current
turned
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
JP13168580A
Other languages
Japanese (ja)
Inventor
Minoru Hiroshima
Masahiro Yanai
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 JP13168580A priority Critical patent/JPS5758283A/en
Publication of JPS5758283A publication Critical patent/JPS5758283A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C19/00—Digital stores in which the information is moved stepwise, e.g. shift registers
    • G11C19/02—Digital stores in which the information is moved stepwise, e.g. shift registers using magnetic elements
    • G11C19/08—Digital stores in which the information is moved stepwise, e.g. shift registers using magnetic elements using thin films in plane structure
    • G11C19/085—Generating magnetic fields therefor, e.g. uniform magnetic field for magnetic domain stabilisation

Abstract

PURPOSE:To prevent an erroneous operation of a quasi defective loop and to make production of a device easier, by changing the variation of the coil current at the rise and breaking times during the preparation period for turning on or off the revolving magnetic field to the slow variation accompanied with no ringing. CONSTITUTION:In a stop preparation period (STOP-PP) at a time t1 which is just before the revolving magnetic field is stopped, the coil current IY is gradually reduced as shown by (b), and the revolving magnetic field is turned off at a time t2. Moreover, the coil current IY is gradually increased as shown by (d) in a start preparation period (START-PP) at a time t3, which is just before the revolving magnetic field is turned on, and the revolving magnetic field is turned on at a time t4. By preventing the ringing of the coil current in this way, an erroneous operation of a quasi defective loop at the time of starting and stopping is prevented, and production of the device become easier.
JP13168580A 1980-09-24 1980-09-24 Magnetic bubble memory device Pending JPS5758283A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13168580A JPS5758283A (en) 1980-09-24 1980-09-24 Magnetic bubble memory device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13168580A JPS5758283A (en) 1980-09-24 1980-09-24 Magnetic bubble memory device

Publications (1)

Publication Number Publication Date
JPS5758283A true JPS5758283A (en) 1982-04-07

Family

ID=15063818

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13168580A Pending JPS5758283A (en) 1980-09-24 1980-09-24 Magnetic bubble memory device

Country Status (1)

Country Link
JP (1) JPS5758283A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5057736A (en) * 1973-09-25 1975-05-20
JPS5058948A (en) * 1973-09-25 1975-05-22
JPS51146132A (en) * 1975-06-11 1976-12-15 Hitachi Ltd Magnetic valve drive circuit control method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5057736A (en) * 1973-09-25 1975-05-20
JPS5058948A (en) * 1973-09-25 1975-05-22
JPS51146132A (en) * 1975-06-11 1976-12-15 Hitachi Ltd Magnetic valve drive circuit control method

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