JPS5577073A - Transfer control system of bubble memory - Google Patents

Transfer control system of bubble memory

Info

Publication number
JPS5577073A
JPS5577073A JP14775178A JP14775178A JPS5577073A JP S5577073 A JPS5577073 A JP S5577073A JP 14775178 A JP14775178 A JP 14775178A JP 14775178 A JP14775178 A JP 14775178A JP S5577073 A JPS5577073 A JP S5577073A
Authority
JP
Japan
Prior art keywords
circuit
margin
gate
bubbles
revolving
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
JP14775178A
Other languages
Japanese (ja)
Inventor
Suketsugu Yamaguchi
Masaaki Okada
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 JP14775178A priority Critical patent/JPS5577073A/en
Publication of JPS5577073A publication Critical patent/JPS5577073A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To shorten access time, etc., without deteriorating the margin of operation by controlling the revolving speed of a revolving magnetic field for magnetic bubble transfer in accordance with whether gate operation should be put in effect or not.
CONSTITUTION: According to control signal S1 from timing control circuit 14, a composite magnetic field is formed by X and Y coils 11 and 12 of memory chip 9 through coil driver circuit 13 to transfer magnetic bubbles on a loop in accordance with the revolving speed of the revolving magnetic field in proportion to the frequency of signal S1. When those bubbles reach a gate and gate operation is performed through gate driver circuit 15, etc., by control signal S4 from circuit 14, signal S1 from circuit 14 lowers in frequency and the transfer speed of bubbles lowers and then increases, so that the gate operation with the margin of operation small will stably be performed. As for sense circuit 16, the margin of operation do not lower similarly and access time and access cycle time are shortened because bubbles are transferred at a high speed in a period having no relation to the margin of operation.
COPYRIGHT: (C)1980,JPO&Japio
JP14775178A 1978-12-01 1978-12-01 Transfer control system of bubble memory Pending JPS5577073A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14775178A JPS5577073A (en) 1978-12-01 1978-12-01 Transfer control system of bubble memory

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14775178A JPS5577073A (en) 1978-12-01 1978-12-01 Transfer control system of bubble memory

Publications (1)

Publication Number Publication Date
JPS5577073A true JPS5577073A (en) 1980-06-10

Family

ID=15437314

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14775178A Pending JPS5577073A (en) 1978-12-01 1978-12-01 Transfer control system of bubble memory

Country Status (1)

Country Link
JP (1) JPS5577073A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5758285A (en) * 1980-09-22 1982-04-07 Fujitsu Ltd Bubble magnetic domain generator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5758285A (en) * 1980-09-22 1982-04-07 Fujitsu Ltd Bubble magnetic domain generator

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