JPS56117308A - Erasing circuit - Google Patents

Erasing circuit

Info

Publication number
JPS56117308A
JPS56117308A JP2008580A JP2008580A JPS56117308A JP S56117308 A JPS56117308 A JP S56117308A JP 2008580 A JP2008580 A JP 2008580A JP 2008580 A JP2008580 A JP 2008580A JP S56117308 A JPS56117308 A JP S56117308A
Authority
JP
Japan
Prior art keywords
circuit
signal
supplied
disk
timing
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
JP2008580A
Other languages
Japanese (ja)
Inventor
Masaki Sano
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP2008580A priority Critical patent/JPS56117308A/en
Publication of JPS56117308A publication Critical patent/JPS56117308A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/012—Recording on, or reproducing or erasing from, magnetic disks

Landscapes

  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

PURPOSE:To improve recording efficiency by making it possible to reduce the gap length of a disk at its outer circumference, by varying the timing of erasing operation by making the delay time of the disk different between its outer and inner circumferences. CONSTITUTION:When write enable signal (a) is supplied and a timing selective signal is at the high level, monostable multivibrators 14 and 15 generate outputs (b) and (c) respectively. These are supplied to OR circuit 18, whose output (d) is sent to exclusive OR circuit 19, which generates output (e) turning on in time t3. This signal is supplied as an erasure signal to driving circuit 21 via buffer circuit 20. When the timing signal is at the low level, monostable multivibrators 16 and 17 generate outputs (f) and (g), OR circuit 18 generates output (h), and exclusive OR circuit generates output (i) turning on in time t6. Those two erasure signals are alternated at the outer and inner circumferences of the disk to reduce the gap length at the outer circumference, improving the recording efficiency.
JP2008580A 1980-02-20 1980-02-20 Erasing circuit Pending JPS56117308A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2008580A JPS56117308A (en) 1980-02-20 1980-02-20 Erasing circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2008580A JPS56117308A (en) 1980-02-20 1980-02-20 Erasing circuit

Publications (1)

Publication Number Publication Date
JPS56117308A true JPS56117308A (en) 1981-09-14

Family

ID=12017260

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2008580A Pending JPS56117308A (en) 1980-02-20 1980-02-20 Erasing circuit

Country Status (1)

Country Link
JP (1) JPS56117308A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4633337A (en) * 1984-03-30 1986-12-30 Sharp Kabushiki Kaisha Floppy disk driving with suitable on-delay and off-delay timing
JPS62137767A (en) * 1985-12-09 1987-06-20 Matsushita Electric Ind Co Ltd Disk type recording carrier

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4633337A (en) * 1984-03-30 1986-12-30 Sharp Kabushiki Kaisha Floppy disk driving with suitable on-delay and off-delay timing
JPS62137767A (en) * 1985-12-09 1987-06-20 Matsushita Electric Ind Co Ltd Disk type recording carrier

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