JPS5745716A - Magnetic disc device - Google Patents

Magnetic disc device

Info

Publication number
JPS5745716A
JPS5745716A JP55120747A JP12074780A JPS5745716A JP S5745716 A JPS5745716 A JP S5745716A JP 55120747 A JP55120747 A JP 55120747A JP 12074780 A JP12074780 A JP 12074780A JP S5745716 A JPS5745716 A JP S5745716A
Authority
JP
Japan
Prior art keywords
generating circuit
reference voltage
circuit
zero cross
digital
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
JP55120747A
Other languages
Japanese (ja)
Inventor
Masayoshi Kamo
Shigemasa Yoshida
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.)
Computer Basic Technology Research Association Corp
Original Assignee
Computer Basic Technology Research Association Corp
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 Computer Basic Technology Research Association Corp filed Critical Computer Basic Technology Research Association Corp
Priority to JP55120747A priority Critical patent/JPS5745716A/en
Publication of JPS5745716A publication Critical patent/JPS5745716A/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
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Manipulation Of Pulses (AREA)
  • Dc Digital Transmission (AREA)

Abstract

PURPOSE:To enable more accurate readout for analog information, by inputting the slice reference voltage of a window pulse generating circuit as digital information externally, at an A/D conversion circuit of a magnetic disc device. CONSTITUTION:An analog signal read out from a head is amplified and a digital zero cross pulse is produced at a differentiation circuit 21 and a zero cross point detection circuit 22. Further, an amplified analog signal is also inputted to a window pulse generating circuit 23. This generating circuit 23 consists of A/D conversion circuits in high speed, and a positive/negative reference voltage for waveform slice is applied from a reference voltage generating circuit 24. This reference voltage generating circuit 24 receives one or more digital information given from the outside of a magnetic disc device and produces reference voltages +VT, -VT of both polarities corresponding to the bit information. Thus produced logical product between window and digital zero cross pulses is taken and the result is outputted as digital information.
JP55120747A 1980-09-01 1980-09-01 Magnetic disc device Pending JPS5745716A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55120747A JPS5745716A (en) 1980-09-01 1980-09-01 Magnetic disc device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55120747A JPS5745716A (en) 1980-09-01 1980-09-01 Magnetic disc device

Publications (1)

Publication Number Publication Date
JPS5745716A true JPS5745716A (en) 1982-03-15

Family

ID=14793975

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55120747A Pending JPS5745716A (en) 1980-09-01 1980-09-01 Magnetic disc device

Country Status (1)

Country Link
JP (1) JPS5745716A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS641155A (en) * 1987-06-22 1989-01-05 Nippon Densan Kk Index signal circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS641155A (en) * 1987-06-22 1989-01-05 Nippon Densan Kk Index signal circuit

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