JPS54131910A - Servo signal system of magnetic recorder - Google Patents

Servo signal system of magnetic recorder

Info

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
Application number
JP4001678A
Other languages
Japanese (ja)
Inventor
Katsuji Kobayashi
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 JP4001678A priority Critical patent/JPS54131910A/en
Publication of JPS54131910A publication Critical patent/JPS54131910A/en
Pending legal-status Critical Current

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
JP4001678A 1978-04-05 1978-04-05 Servo signal system of magnetic recorder Pending JPS54131910A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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

Similar Documents

Publication Publication Date Title
JPS51138410A (en) Method of recording and reproducing signal
JPS54131910A (en) Servo signal system of magnetic recorder
JPS53113517A (en) Recording/reproducing system
JPS52123222A (en) Information disk reproducing system
SU618782A2 (en) Digital information recording/reproducing apparatus
SU705507A1 (en) Device for display of high-density digital magnetic record
JPS5234616A (en) Magnetic video recording reproduction equipment
JPS5349910A (en) Video signal process system using rotary recording medium
JPS5277713A (en) Signal recording and reproduction system
JPS5668906A (en) Wow and flutter improving device
JPS5283117A (en) Frequency conversion at video signal processing
JPS53118015A (en) Interpolation reproduction of information
SU698042A1 (en) Data reproduction system
JPS57186210A (en) Data recording method for tape recorder
JPS5222824A (en) Picture signal recording method
JPS57184378A (en) Variable speed vtr
JPS5619508A (en) Magnetic recording and reproducing system
JPS5573955A (en) Recording and reproduction system for control signal
JPS5677913A (en) Nrzi system recording/reproducing circuit
JPS53115209A (en) Magnetic recording method
JPS5280819A (en) Signal recording and reproduction system
JPS55160314A (en) Interface circuit of audio cassette tape recorder
JPS5616924A (en) Magnetic recording and reproducing system
JPS51123622A (en) A information data record/reproduce method
JPS5390905A (en) Measurig method for magnetic characteristic of magnetic recording medium