JPS5485643A - Memory unit - Google Patents

Memory unit

Info

Publication number
JPS5485643A
JPS5485643A JP15392677A JP15392677A JPS5485643A JP S5485643 A JPS5485643 A JP S5485643A JP 15392677 A JP15392677 A JP 15392677A JP 15392677 A JP15392677 A JP 15392677A JP S5485643 A JPS5485643 A JP S5485643A
Authority
JP
Japan
Prior art keywords
magnetic field
memory
driving circuit
bubble
memory unit
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
JP15392677A
Other languages
Japanese (ja)
Inventor
Hiroshi Murakami
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP15392677A priority Critical patent/JPS5485643A/en
Publication of JPS5485643A publication Critical patent/JPS5485643A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C8/00—Arrangements for selecting an address in a digital store
    • G11C8/12—Group selection circuits, e.g. for memory block selection, chip selection, array selection

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Techniques For Improving Reliability Of Storages (AREA)
  • For Increasing The Reliability Of Semiconductor Memories (AREA)

Abstract

PURPOSE:To reduce the capacity of the memory loop state memory unit as well as to reduce the cost for the memory unit as a whole by classifying the memory loop into some groups and then storing the normal and defective information with every group. CONSTITUTION:More than one unit of the magnetic bubble element containing the defective minor loop is stored in memory brain 301, and the following units are provided as the peripheral circuits to be connected to each component element of the magnetic bubble element: generator driving circuit 302; eraser driving circuit 303; transfer gate driving circuit 304; and sense amplifier 305 respectively. Furthermore, bias magnetic field device 306 is installed to supply the bias magnetic field for the steady existence of the bubble domain, along with rotary magnetic field device 307 to supply the magnetic field to shift the bubble domain. These circuits and devices are controlled by control circuit 308.
JP15392677A 1977-12-20 1977-12-20 Memory unit Pending JPS5485643A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15392677A JPS5485643A (en) 1977-12-20 1977-12-20 Memory unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15392677A JPS5485643A (en) 1977-12-20 1977-12-20 Memory unit

Publications (1)

Publication Number Publication Date
JPS5485643A true JPS5485643A (en) 1979-07-07

Family

ID=15573091

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15392677A Pending JPS5485643A (en) 1977-12-20 1977-12-20 Memory unit

Country Status (1)

Country Link
JP (1) JPS5485643A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55122293A (en) * 1979-03-14 1980-09-19 Hitachi Ltd Memory control system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55122293A (en) * 1979-03-14 1980-09-19 Hitachi Ltd Memory control system
JPS6144345B2 (en) * 1979-03-14 1986-10-02 Hitachi Ltd

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