JPS54131910A - Servo signal system of magnetic recorder - Google Patents
Servo signal system of magnetic recorderInfo
- Publication number
- JPS54131910A JPS54131910A JP4001678A JP4001678A JPS54131910A JP S54131910 A JPS54131910 A JP S54131910A JP 4001678 A JP4001678 A JP 4001678A JP 4001678 A JP4001678 A JP 4001678A JP S54131910 A JPS54131910 A JP S54131910A
- Authority
- JP
- Japan
- Prior art keywords
- signals
- servo
- tracks
- sawtooth
- writing
- 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
Landscapes
- Moving Of The Head To Find And Align With The Track (AREA)
- Control Of Position Or Direction (AREA)
Abstract
PURPOSE: To obtain perfect position signals by writing servo signals in first, second servo tracks with sawtooth waveform current so that the read waveforms of the servo signals become of opposite polarities with the first, second servo tracks.
CONSTITUTION: Writing of servo signals of saw tooth waves wherein the sloping directions of the sawtooth wave signals are respectively opposite and the phases at the rising differ is accomplished in the first, second servo tracks which position a magnetic head with respect to the data tracks of a magnetic recording medium. Hence, with these read signal waveforms, peak values of positive or negative polarity are obtained only at the rise point of the sawtooth waves and the outputs become nearly of a constant value at the sloping portions. As a result, if one is the peak value of the positive polarity, the other becomes a peak value of the negative polarity and separation of both may be readily performed, thus the perfect position signals may be obtained without using phase synchronizing circuit, etc.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4001678A JPS54131910A (en) | 1978-04-05 | 1978-04-05 | Servo signal system of magnetic recorder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4001678A JPS54131910A (en) | 1978-04-05 | 1978-04-05 | Servo signal system of magnetic recorder |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54131910A true JPS54131910A (en) | 1979-10-13 |
Family
ID=12569101
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4001678A Pending JPS54131910A (en) | 1978-04-05 | 1978-04-05 | Servo signal system of magnetic recorder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54131910A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2593633A1 (en) * | 1986-01-27 | 1987-07-31 | Sagem | METHOD OF WRITING AND READING A MAGNETIC TRACK, ESPECIALLY FOR POSITIONALLY ADJUSTING MAGNETIC HEADS; MAGNETIC SUPPORT COMPRISING AT LEAST ONE SUCH TRACK; METHOD FOR POSITIONALLY ADJUSTING MAGNETIC HEADS USING SUCH TRACKS |
JPH01307979A (en) * | 1988-06-07 | 1989-12-12 | Nec Corp | Floppy disk device |
-
1978
- 1978-04-05 JP JP4001678A patent/JPS54131910A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2593633A1 (en) * | 1986-01-27 | 1987-07-31 | Sagem | METHOD OF WRITING AND READING A MAGNETIC TRACK, ESPECIALLY FOR POSITIONALLY ADJUSTING MAGNETIC HEADS; MAGNETIC SUPPORT COMPRISING AT LEAST ONE SUCH TRACK; METHOD FOR POSITIONALLY ADJUSTING MAGNETIC HEADS USING SUCH TRACKS |
JPH01307979A (en) * | 1988-06-07 | 1989-12-12 | Nec Corp | Floppy disk device |
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