JPS54145110A - Head positioning system of magnetic disc apparatus - Google Patents

Head positioning system of magnetic disc apparatus

Info

Publication number
JPS54145110A
JPS54145110A JP5249578A JP5249578A JPS54145110A JP S54145110 A JPS54145110 A JP S54145110A JP 5249578 A JP5249578 A JP 5249578A JP 5249578 A JP5249578 A JP 5249578A JP S54145110 A JPS54145110 A JP S54145110A
Authority
JP
Japan
Prior art keywords
signal
circuit
head
outputted
read
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
JP5249578A
Other languages
Japanese (ja)
Inventor
Toshio Negoro
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 JP5249578A priority Critical patent/JPS54145110A/en
Publication of JPS54145110A publication Critical patent/JPS54145110A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To achieve the reduction of the mean access time of the apparatus by reducing the differnce between the time until the position holding mode of the head stabilizes and the time until the read-write enable signal is outputted.
CONSTITUTION: When the read-write instruction R/W is applied from a CPU or the like to a logic circuit 81, the moving distance x of a head is applied to a variable length pulse generating circuit 82. On the other hand, as the control of the head is started, the signal HSg from the head is inputted to a position signal making circuit 83, by which the position signal PSg is formed. This signal is then detected with a slice circuit 84 and when the level of the position signal coincides with the slice level, the trigger signal TSg is supplied to the circuit 82, by which the variable length pulse signal VLP is outputted to the circuit 81. When no more input of the signal VLP is obtained, the read-write enable signal R is outputted to the CPU or the like.
COPYRIGHT: (C)1979,JPO&Japio
JP5249578A 1978-05-01 1978-05-01 Head positioning system of magnetic disc apparatus Pending JPS54145110A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5249578A JPS54145110A (en) 1978-05-01 1978-05-01 Head positioning system of magnetic disc apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5249578A JPS54145110A (en) 1978-05-01 1978-05-01 Head positioning system of magnetic disc apparatus

Publications (1)

Publication Number Publication Date
JPS54145110A true JPS54145110A (en) 1979-11-13

Family

ID=12916287

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5249578A Pending JPS54145110A (en) 1978-05-01 1978-05-01 Head positioning system of magnetic disc apparatus

Country Status (1)

Country Link
JP (1) JPS54145110A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58130471A (en) * 1982-01-29 1983-08-03 Fujitsu Ltd Control system for positioning of head
JPS58177573A (en) * 1982-04-09 1983-10-18 Hitachi Ltd Magnetic disk device
JPS60125966A (en) * 1983-12-09 1985-07-05 Canon Inc Recorder
JPS6364681A (en) * 1986-09-05 1988-03-23 Sony Corp Positioning device for head of magnetic disk system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58130471A (en) * 1982-01-29 1983-08-03 Fujitsu Ltd Control system for positioning of head
JPH0136184B2 (en) * 1982-01-29 1989-07-28 Fujitsu Ltd
JPS58177573A (en) * 1982-04-09 1983-10-18 Hitachi Ltd Magnetic disk device
JPS60125966A (en) * 1983-12-09 1985-07-05 Canon Inc Recorder
JPS6364681A (en) * 1986-09-05 1988-03-23 Sony Corp Positioning device for head of magnetic disk system

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