JPS54145110A - Head positioning system of magnetic disc apparatus - Google Patents
Head positioning system of magnetic disc apparatusInfo
- 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
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
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)
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 |
-
1978
- 1978-05-01 JP JP5249578A patent/JPS54145110A/en active Pending
Cited By (5)
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 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS53125581A (en) | Phase controller | |
JPS54145110A (en) | Head positioning system of magnetic disc apparatus | |
JPS5294035A (en) | Character pattern generating device | |
JPS54186A (en) | Stopping command generating circuit in position controller | |
JPS5269881A (en) | Defoaming agent | |
JPS51144253A (en) | Photo-fiber check method | |
JPS51132663A (en) | Cleaning apparatus | |
JPS5368921A (en) | Memory controller | |
JPS536080A (en) | Frequency detection circuit | |
JPS5438107A (en) | Magnetic disc apparatus | |
JPS53143874A (en) | Sending velocity command pulse generator | |
JPS5372545A (en) | Information processor | |
JPS5360607A (en) | Control signal regenerating system | |
JPS5532213A (en) | Tape recorder | |
JPS52105158A (en) | D8-dihydropimaride derivatives | |
JPS52122366A (en) | Indazole derivatives | |
JPS5441138A (en) | Recorder | |
JPS52137242A (en) | Pulse signal generator | |
JPS5366264A (en) | Alarm sound control system | |
JPS5373179A (en) | Comparison circuit of pulse phase | |
JPS5244131A (en) | Timing pulse generator equipment | |
JPS53140012A (en) | Locading control circuit for magnetic head | |
JPS52150698A (en) | Pattern identification system of bank notes, etc. | |
JPS53109435A (en) | Optical character reader | |
JPS52101926A (en) | Control method for recording medium near end signal |