JPS5564678A - Address mark detection circuit - Google Patents

Address mark detection circuit

Info

Publication number
JPS5564678A
JPS5564678A JP13591278A JP13591278A JPS5564678A JP S5564678 A JPS5564678 A JP S5564678A JP 13591278 A JP13591278 A JP 13591278A JP 13591278 A JP13591278 A JP 13591278A JP S5564678 A JPS5564678 A JP S5564678A
Authority
JP
Japan
Prior art keywords
address mark
noises
detection circuit
erasing
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
JP13591278A
Other languages
Japanese (ja)
Inventor
Osamu Ishii
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 JP13591278A priority Critical patent/JPS5564678A/en
Publication of JPS5564678A publication Critical patent/JPS5564678A/en
Pending legal-status Critical Current

Links

Landscapes

  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)

Abstract

PURPOSE: To detect accurately an address mark when a noise arrives in an erasing part by provided circuits, which detects a non-signal part of a string of data of a magnetic disk and that which erases noises form the string of data.
CONSTITUTION: Input signal 1 has noises in its address mark part. Output 7 of voltage comparator 3 is digitized with noises contained and then inputted to pulse- interval detection circuit 8. Then NOT circuit 10 outputs output 4 that the number pulse of input 7 is NOTed from the rise of input signal 9, indicating the complete erasing of noise pulses. Therefore, an address mark detection signal is detected accurately. In this constitution, even when noises arrive in the erasing part, an address mark is detected accurately and reliability of an address mark detector can greatly be improved.
COPYRIGHT: (C)1980,JPO&Japio
JP13591278A 1978-11-06 1978-11-06 Address mark detection circuit Pending JPS5564678A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13591278A JPS5564678A (en) 1978-11-06 1978-11-06 Address mark detection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13591278A JPS5564678A (en) 1978-11-06 1978-11-06 Address mark detection circuit

Publications (1)

Publication Number Publication Date
JPS5564678A true JPS5564678A (en) 1980-05-15

Family

ID=15162734

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13591278A Pending JPS5564678A (en) 1978-11-06 1978-11-06 Address mark detection circuit

Country Status (1)

Country Link
JP (1) JPS5564678A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61133082A (en) * 1984-12-01 1986-06-20 Nippon T M I:Kk Magnetic recording tape

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61133082A (en) * 1984-12-01 1986-06-20 Nippon T M I:Kk Magnetic recording tape

Similar Documents

Publication Publication Date Title
JPS6453623A (en) Pulse detecting circuit employing amplitude and time recognition
GB1445855A (en) Apparatus for measuring the pitch period of the basic sounds of speech
JPS5564678A (en) Address mark detection circuit
JPS5733363A (en) Waveform storage device
JPS53148329A (en) Tablet input unit
JPS5654120A (en) Amplitude discriminating circuit for magnetic recorder
JPS55157116A (en) Signal recording and reproducing device
JPS5679963A (en) Waveform measuring method and its device
JPS5750601A (en) Detector for moving object
JPS5427726A (en) Detecting method for indication position of electrostatic coupling type input device
JPS56121120A (en) Setting method for initial state of information processor
JPS56154858A (en) Amplitude detector for binary amplitude-modulated wave
JPS5427327A (en) Test circuit for memory
JPS5659358A (en) Error detection system of magnetic disk write information
JPS5768943A (en) Bipolar pulse error discrimination circuit
JPS5376867A (en) Maximum and minimum detecting circuit
JPS5556279A (en) Perforated medium read system
JPS5471935A (en) Signal sampling pulse generator
JPS5640778A (en) Magnetism failure detector
JPS55100760A (en) Signal-discontinuance detection circuit of photo pcm receiver
JPS5462809A (en) Magnetic recording information identifying apparatus
JPS5332068A (en) Signal detecting circuit
JPS51147309A (en) Detective circuit of discrimination error at a discriminative circuit
JPS6425347A (en) Flexible disk device
JPS5592983A (en) Type mark detection circuit