JPS5786121A - Data reproducing circuit of magnetic recorder and reproducer - Google Patents

Data reproducing circuit of magnetic recorder and reproducer

Info

Publication number
JPS5786121A
JPS5786121A JP55160352A JP16035280A JPS5786121A JP S5786121 A JPS5786121 A JP S5786121A JP 55160352 A JP55160352 A JP 55160352A JP 16035280 A JP16035280 A JP 16035280A JP S5786121 A JPS5786121 A JP S5786121A
Authority
JP
Japan
Prior art keywords
circuit
data
pulse
dropout
data signal
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
JP55160352A
Other languages
Japanese (ja)
Inventor
Hiromi Matsushige
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.)
NIPPON SHIYUUHENKI KK
Fujitsu Ltd
Hitachi Ltd
Original Assignee
NIPPON SHIYUUHENKI KK
Fujitsu Ltd
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 NIPPON SHIYUUHENKI KK, Fujitsu Ltd, Hitachi Ltd filed Critical NIPPON SHIYUUHENKI KK
Priority to JP55160352A priority Critical patent/JPS5786121A/en
Publication of JPS5786121A publication Critical patent/JPS5786121A/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
    • G11B20/18—Error detection or correction; Testing, e.g. of drop-outs

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

PURPOSE:To reduce data errors by providing a circuit which detects the dropout of a data signal due to a defective on a magnetic recording medium from the input-side signal of a pulse shaping circuit and by controlling the frequency response characteristics of a synchronizing circuit by the output signal of said circuit. CONSTITUTION:A data signal read by a rotary head 2 from a medium 1 is inputted to an equivalent circuit 5 through a preamplifying circuit 3 and a gain control circuit 4 and a pulse shaping circuit 6 outputs a readout pulse, but if the data signal has a dropout, the pulse shaping circuit 6 outputs a readout pulse having a peak shift. An amplitude limiting circuit 9, on the other hand, places a synchronizing circuit 7 in high gain mode by its output signal only during the period of the dropout. Consequently, the following-up performance of the synchronizing circuit 7 is increased and a clock pulse which follows up the peak shift is supplied to a data demodulating circuit 8, thus obtaining a demodulated data signal free of a data error.
JP55160352A 1980-11-14 1980-11-14 Data reproducing circuit of magnetic recorder and reproducer Pending JPS5786121A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55160352A JPS5786121A (en) 1980-11-14 1980-11-14 Data reproducing circuit of magnetic recorder and reproducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55160352A JPS5786121A (en) 1980-11-14 1980-11-14 Data reproducing circuit of magnetic recorder and reproducer

Publications (1)

Publication Number Publication Date
JPS5786121A true JPS5786121A (en) 1982-05-29

Family

ID=15713113

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55160352A Pending JPS5786121A (en) 1980-11-14 1980-11-14 Data reproducing circuit of magnetic recorder and reproducer

Country Status (1)

Country Link
JP (1) JPS5786121A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984003581A1 (en) * 1983-03-08 1984-09-13 Sony Corp Apparatus for reproducing data signal
EP1126398A3 (en) * 2000-01-24 2002-08-21 Kabushiki Kaisha Sankyo Seiki Seisakusho Magnetic card reader and reproduction and demodulation method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984003581A1 (en) * 1983-03-08 1984-09-13 Sony Corp Apparatus for reproducing data signal
EP1126398A3 (en) * 2000-01-24 2002-08-21 Kabushiki Kaisha Sankyo Seiki Seisakusho Magnetic card reader and reproduction and demodulation method
US6570722B2 (en) 2000-01-24 2003-05-27 Kabushiki Kaisha Sankyo Seiki Seisakusho Magnetic card reader and magnetic data reproduction method using signal peak point intervals
US6570723B2 (en) 2000-01-24 2003-05-27 Kabushiki Kaisha Sankyo Seiki Seisakusho Magnetic card reader and magnetic data reproduction method, data demodulation method and demodulator of magnetic record data
US6781776B2 (en) 2000-01-24 2004-08-24 Kabushiki Kaisha Sankyo Seiki Seisakusho Magnetic card reader and magnetic data reproduction method using signal peak point intervals

Similar Documents

Publication Publication Date Title
JPS57167172A (en) High density information recording and reproducing system
JPS55113175A (en) Information signal recording medium and its recording system
JPS6417554A (en) Facsimile equipment
EP0171288A3 (en) Method of magnetic recording
JPS53149308A (en) Recorder-reproducer of digital signals
JPS57150173A (en) Reproducer for disc shape information recording medium
JPS5542337A (en) Magnetic recording reproducing device
JPS53149012A (en) Digital signal recording and reproducing system
JPH0528598Y2 (en)
JPS55146674A (en) Digital audio disk unit
JPS5356919A (en) Recording and reproducing unit of video signal and sound signal
SU706877A1 (en) Device for recording information onto drum-type magnetic carrier
JPS5755509A (en) Recorder and reproducer
JPS53116106A (en) Removal method of interference distortion produced in demodulated signals by inteference of fm wave signals to themselves in recording and reproducing system of mu-tichannel disc records
JPS53115209A (en) Magnetic recording method
JPS5517802A (en) Magnetic recorder and reproducing device
EP0387804A3 (en) Recording of frequency-multiplex signal on recording medium
JPS57200914A (en) Tape recorder
JPS5397324A (en) Recorded information reproducer
JPS5750319A (en) Sound recording circuit of tape recorder
JPS55163627A (en) Information recorder/reproducer
JPS6110579U (en) Radar angle signal regenerator
JPS55128989A (en) Video disk and disk reproducer
JPS5623081A (en) Digital picture recording device
JPS55113108A (en) Magnetic recording and reproducing circuit