GB2019141A - Drive circuit for magnetic bubble device - Google Patents

Drive circuit for magnetic bubble device

Info

Publication number
GB2019141A
GB2019141A GB7911547A GB7911547A GB2019141A GB 2019141 A GB2019141 A GB 2019141A GB 7911547 A GB7911547 A GB 7911547A GB 7911547 A GB7911547 A GB 7911547A GB 2019141 A GB2019141 A GB 2019141A
Authority
GB
United Kingdom
Prior art keywords
switches
bubble device
coil
circuit
drive circuit
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
GB7911547A
Other versions
GB2019141B (en
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
Publication of GB2019141A publication Critical patent/GB2019141A/en
Application granted granted Critical
Publication of GB2019141B publication Critical patent/GB2019141B/en
Expired 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

Landscapes

  • Control Of Stepping Motors (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

A drive circuit for a magnetic bubble device has a series circuit with first 32 and second 33 switches connected in parallel with a series circuit having third 34 and fourth 35 switches. The switches carry currents 37, 38, 39 and 40 respectively from a D.C. power source connected across the parallel circuit. A coil 31 is connected between the junction of the first 32 and second 33 switches and the junction of the third 34 and fourth 35 switches. The switches are controlled by a control circuit (not shown) which causes a current 41 with an alternating waveform to flow in the coil 31. The control circuit forms a region of the waveform, when the current passes through zero, which has zero gradient. This region prevents the build up of drive current in the coil which would cause a displacement in the magnetic fields in the bubble device, and hence unsatisfactory operation. <IMAGE>
GB7911547A 1978-04-12 1979-04-03 Drive circuit for magnetic bubble device Expired GB2019141B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4213278A JPS5827907B2 (en) 1978-04-12 1978-04-12 Drive circuit for magnetic bubble device

Publications (2)

Publication Number Publication Date
GB2019141A true GB2019141A (en) 1979-10-24
GB2019141B GB2019141B (en) 1982-03-31

Family

ID=12627402

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7911547A Expired GB2019141B (en) 1978-04-12 1979-04-03 Drive circuit for magnetic bubble device

Country Status (4)

Country Link
JP (1) JPS5827907B2 (en)
DE (1) DE2915138C3 (en)
GB (1) GB2019141B (en)
NL (1) NL7902818A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0130780A2 (en) * 1983-06-29 1985-01-09 Unisys Corporation Method of operating a magnetic bubble memory with a drive field that temporarily stops
EP4350966A1 (en) * 2022-10-05 2024-04-10 Infineon Technologies Austria AG Switching converter using partial power processing

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS597153B2 (en) * 1978-09-12 1984-02-16 日本電気株式会社 magnetic bubble drive device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0130780A2 (en) * 1983-06-29 1985-01-09 Unisys Corporation Method of operating a magnetic bubble memory with a drive field that temporarily stops
EP0130780A3 (en) * 1983-06-29 1988-01-27 Unisys Corporation Method of operating a magnetic bubble memory with a drive field that temporarily stops
EP4350966A1 (en) * 2022-10-05 2024-04-10 Infineon Technologies Austria AG Switching converter using partial power processing

Also Published As

Publication number Publication date
DE2915138C3 (en) 1981-04-30
DE2915138B2 (en) 1980-08-14
DE2915138A1 (en) 1979-10-18
JPS5827907B2 (en) 1983-06-13
NL7902818A (en) 1979-10-16
GB2019141B (en) 1982-03-31
JPS54134936A (en) 1979-10-19

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19960403