JPS55135477A - Adjuster for recording current level - Google Patents

Adjuster for recording current level

Info

Publication number
JPS55135477A
JPS55135477A JP4287279A JP4287279A JPS55135477A JP S55135477 A JPS55135477 A JP S55135477A JP 4287279 A JP4287279 A JP 4287279A JP 4287279 A JP4287279 A JP 4287279A JP S55135477 A JPS55135477 A JP S55135477A
Authority
JP
Japan
Prior art keywords
level
counter
recording current
current level
peak point
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
JP4287279A
Other languages
Japanese (ja)
Inventor
Yoshihiro Nakaoki
Tetsushi Sekimoto
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Priority to JP4287279A priority Critical patent/JPS55135477A/en
Publication of JPS55135477A publication Critical patent/JPS55135477A/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
    • G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor

Landscapes

  • Television Signal Processing For Recording (AREA)

Abstract

PURPOSE:To secure the automatic setting of the recording current level to the optimum level by changing sequentially the recording current level according to the output of the counter which counts the clock signals, reproducing current level to detect the peak point of the reproduction signal level and then setting the count value of the counter to the level equivalent to the peak point. CONSTITUTION:The clock generation circuit generates the clock signals in synchronization with the cycle signal of the video signal. And counter 21 counts these clock signals. Recording current adjuster circuit 14 gives the sequential change to the recording current level to be recorded on the magnetic recording medium and in accordance with the output of counter 21. Peak detection circuit 17 detects the peak point of the reproduction signal level sent from the magnetic recording medium. Thus the count value of counter 21 is set to the value equivalent to the peak point of the reproduction signal level in accorance with the output of the peak detection circuit.
JP4287279A 1979-04-09 1979-04-09 Adjuster for recording current level Pending JPS55135477A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4287279A JPS55135477A (en) 1979-04-09 1979-04-09 Adjuster for recording current level

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4287279A JPS55135477A (en) 1979-04-09 1979-04-09 Adjuster for recording current level

Publications (1)

Publication Number Publication Date
JPS55135477A true JPS55135477A (en) 1980-10-22

Family

ID=12648119

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4287279A Pending JPS55135477A (en) 1979-04-09 1979-04-09 Adjuster for recording current level

Country Status (1)

Country Link
JP (1) JPS55135477A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6258402A (en) * 1985-09-06 1987-03-14 Sony Corp Method and instrument for measuring optimum recording current in video tape recorder
JPS62117109A (en) * 1985-11-15 1987-05-28 Pioneer Electronic Corp Optimum sound recording characteristic adjusting device of tape recorder

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5358212A (en) * 1976-11-08 1978-05-26 Hitachi Denshi Ltd Magnetic current optimization system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5358212A (en) * 1976-11-08 1978-05-26 Hitachi Denshi Ltd Magnetic current optimization system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6258402A (en) * 1985-09-06 1987-03-14 Sony Corp Method and instrument for measuring optimum recording current in video tape recorder
JPS62117109A (en) * 1985-11-15 1987-05-28 Pioneer Electronic Corp Optimum sound recording characteristic adjusting device of tape recorder

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