JPS52111707A - Magnetic memory of rotary body type - Google Patents

Magnetic memory of rotary body type

Info

Publication number
JPS52111707A
JPS52111707A JP2808276A JP2808276A JPS52111707A JP S52111707 A JPS52111707 A JP S52111707A JP 2808276 A JP2808276 A JP 2808276A JP 2808276 A JP2808276 A JP 2808276A JP S52111707 A JPS52111707 A JP S52111707A
Authority
JP
Japan
Prior art keywords
rotary body
magnetic memory
body type
synchronism
rotations
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
JP2808276A
Other languages
Japanese (ja)
Inventor
Kunio Nakamura
Yukito Hayashi
Seiji Konaka
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP2808276A priority Critical patent/JPS52111707A/en
Publication of JPS52111707A publication Critical patent/JPS52111707A/en
Pending legal-status Critical Current

Links

Landscapes

  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

PURPOSE: To make the recorded density of the written data on a track constant at all times by controlling the output frequency of a voltage control oscillator, which is operative to produce a writing clock, by the use of a speed detecting signal which is produced in synchronism with the rotations of a rotary body.
COPYRIGHT: (C)1977,JPO&Japio
JP2808276A 1976-03-17 1976-03-17 Magnetic memory of rotary body type Pending JPS52111707A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2808276A JPS52111707A (en) 1976-03-17 1976-03-17 Magnetic memory of rotary body type

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2808276A JPS52111707A (en) 1976-03-17 1976-03-17 Magnetic memory of rotary body type

Publications (1)

Publication Number Publication Date
JPS52111707A true JPS52111707A (en) 1977-09-19

Family

ID=12238847

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2808276A Pending JPS52111707A (en) 1976-03-17 1976-03-17 Magnetic memory of rotary body type

Country Status (1)

Country Link
JP (1) JPS52111707A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0534799A (en) * 1991-08-01 1993-02-12 Fuji Photo Film Co Ltd Camera system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0534799A (en) * 1991-08-01 1993-02-12 Fuji Photo Film Co Ltd Camera system

Similar Documents

Publication Publication Date Title
JPS5232330A (en) Superposition recording device
JPS5369617A (en) Automatic tracking apparatus
JPS52111707A (en) Magnetic memory of rotary body type
JPS5216933A (en) Information management apparatus
JPS5231626A (en) Magnetic bubble cassette memory
JPS5252678A (en) Travelling recorder
JPS5317045A (en) Information retrieval method and its device
JPS5367324A (en) Magnetic bubble cassette memory
JPS5432309A (en) Magnetic data write apparatus
JPS5370415A (en) Synchronizing circuit for magnetic memory
JPS5320911A (en) Magnetic recording information reading system
JPS5230336A (en) Information writing device of magnetic pulse
JPS5273712A (en) Magnetic recording and playback apparatus
JPS5374008A (en) Servo signal writing method
JPS5366131A (en) Magnetic disc memory control unit
JPS52119914A (en) Recording system of magnetic memory device
JPS5210116A (en) Magnetized memory reading device
JPS51112315A (en) Recording method for magnetic memory device
JPS5433629A (en) Information reproducing lircuit
JPS5339710A (en) Magnetic recorder
JPS52126246A (en) Recorder
JPS5358210A (en) Information recording and reproduction system
JPS567286A (en) Information writing system of magnetic bubble memory unit
JPS5378815A (en) Magnetic image recording and reproducing system of rotary head type
JPS5432025A (en) Magnetic data writing device