JPS57154692A - Current stretch bubble detecting method - Google Patents

Current stretch bubble detecting method

Info

Publication number
JPS57154692A
JPS57154692A JP3874881A JP3874881A JPS57154692A JP S57154692 A JPS57154692 A JP S57154692A JP 3874881 A JP3874881 A JP 3874881A JP 3874881 A JP3874881 A JP 3874881A JP S57154692 A JPS57154692 A JP S57154692A
Authority
JP
Japan
Prior art keywords
stretch
current
pulse
bubble
conductor
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
JP3874881A
Other languages
Japanese (ja)
Other versions
JPS6040109B2 (en
Inventor
Tsutomu Miyashita
Kazuo Matsuda
Kazunari Yoneno
Makoto Ohashi
Yoshio 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.)
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 JP3874881A priority Critical patent/JPS6040109B2/en
Priority to DE8181304301T priority patent/DE3176047D1/en
Priority to US06/303,588 priority patent/US4445200A/en
Priority to EP81304301A priority patent/EP0048606B1/en
Publication of JPS57154692A publication Critical patent/JPS57154692A/en
Publication of JPS6040109B2 publication Critical patent/JPS6040109B2/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
    • G11C19/0866—Detecting magnetic domains

Abstract

PURPOSE:To improve a current margin and a bias margin, by using a trapezoidal pulse as a stretch current applied to a detector which is provided with a stretch conductor of a magnetic bubble memory device. CONSTITUTION:As for a detector using a stretch conductor, a bubble 9 is transferred to the right from the left of a transfer pattern 6 as indicated with an arrow by a rotating magnetic field, and while the bubble is staying at a sediment part 10 positioned at a hairpin loop of the stretch conductor 7, a stretch pulse current 3 is made to flow to the stretch conductor 7, the bubble is stretched and regarded as a stripe domain, and a resistance variation of a permalloy detector 8 due to this stripe domain is detected. In this case, a stretch pulse 13 is obtained by adding a trapezoidal pulse of a current I2 to a main pulse of a current I1, its current margin becomes larger than a conventional rectangular pulse, and the upper limit of the bias margin is improved remarkably.
JP3874881A 1980-09-20 1981-03-19 Current stretch bubble detection method Expired JPS6040109B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP3874881A JPS6040109B2 (en) 1981-03-19 1981-03-19 Current stretch bubble detection method
DE8181304301T DE3176047D1 (en) 1980-09-20 1981-09-18 Magnetic bubble memory device
US06/303,588 US4445200A (en) 1980-09-20 1981-09-18 Magnetic bubble memory detection method and device
EP81304301A EP0048606B1 (en) 1980-09-20 1981-09-18 Magnetic bubble memory device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3874881A JPS6040109B2 (en) 1981-03-19 1981-03-19 Current stretch bubble detection method

Publications (2)

Publication Number Publication Date
JPS57154692A true JPS57154692A (en) 1982-09-24
JPS6040109B2 JPS6040109B2 (en) 1985-09-09

Family

ID=12533919

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3874881A Expired JPS6040109B2 (en) 1980-09-20 1981-03-19 Current stretch bubble detection method

Country Status (1)

Country Link
JP (1) JPS6040109B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5864691A (en) * 1981-10-14 1983-04-18 Nec Corp Detector and eraser for continuous disk bubble
JPS62219291A (en) * 1986-03-19 1987-09-26 Nec Corp Method for driving current stretch type magnetic bubble expander/eraser

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5864691A (en) * 1981-10-14 1983-04-18 Nec Corp Detector and eraser for continuous disk bubble
JPS62219291A (en) * 1986-03-19 1987-09-26 Nec Corp Method for driving current stretch type magnetic bubble expander/eraser

Also Published As

Publication number Publication date
JPS6040109B2 (en) 1985-09-09

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