JPS5683819A - Magnetic recording system - Google Patents

Magnetic recording system

Info

Publication number
JPS5683819A
JPS5683819A JP16104979A JP16104979A JPS5683819A JP S5683819 A JPS5683819 A JP S5683819A JP 16104979 A JP16104979 A JP 16104979A JP 16104979 A JP16104979 A JP 16104979A JP S5683819 A JPS5683819 A JP S5683819A
Authority
JP
Japan
Prior art keywords
input
circuit
outputs
nand
circuits
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
JP16104979A
Other languages
Japanese (ja)
Inventor
Koji Uno
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 JP16104979A priority Critical patent/JPS5683819A/en
Publication of JPS5683819A publication Critical patent/JPS5683819A/en
Pending legal-status Critical Current

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  • Digital Magnetic Recording (AREA)

Abstract

PURPOSE: To improve the level margin, by recording the first and the last inversion positions forward and backward from regular positions respectively when the minimum interval of magnetization inversion continues twice, in the magnetic recording system where binary information is recorded correspondingly to presence and absence of magnetization inversion.
CONSTITUTION: The write clock signal is delayed by delay circuits 20 and 21 and is input to shift register 7 to form a shift timing. Output of the 0thWthe fourth stages of shift register 7 are input to NAND circuit 12, and outputs of the secondW the sixth stages are input to NAND circuit 13. However inhibiting circuit 8W11 are interposed for outputs of the 0th, the fourth, the second, and the sixth stages. The output of the third stage and outputs of NAND circuits 12 and 13 are input to NAND circuit 41. Outputs of NAND circuits 12W14 are input to NOR circuits 15W 17 respectively and pass through OR circuit 18, 1/2 frequency dividing circuit 19 as clock signals (1)W(3) respectively to output a signal obtained by subjecting data to NRZ modulation. As a result, the level margin is improved.
COPYRIGHT: (C)1981,JPO&Japio
JP16104979A 1979-12-12 1979-12-12 Magnetic recording system Pending JPS5683819A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16104979A JPS5683819A (en) 1979-12-12 1979-12-12 Magnetic recording system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16104979A JPS5683819A (en) 1979-12-12 1979-12-12 Magnetic recording system

Publications (1)

Publication Number Publication Date
JPS5683819A true JPS5683819A (en) 1981-07-08

Family

ID=15727625

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16104979A Pending JPS5683819A (en) 1979-12-12 1979-12-12 Magnetic recording system

Country Status (1)

Country Link
JP (1) JPS5683819A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5987610A (en) * 1982-11-10 1984-05-21 Fujitsu Ltd Pre-shifting circuit of write data
US6157506A (en) * 1997-03-18 2000-12-05 Fujitsu Limited Write compensation method and magnetic disk apparatus adapted for high-density recording

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5987610A (en) * 1982-11-10 1984-05-21 Fujitsu Ltd Pre-shifting circuit of write data
JPH0465442B2 (en) * 1982-11-10 1992-10-20 Fujitsu Ltd
US6157506A (en) * 1997-03-18 2000-12-05 Fujitsu Limited Write compensation method and magnetic disk apparatus adapted for high-density recording

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