JPS56127958A - Magnetic recorder and reproducer - Google Patents

Magnetic recorder and reproducer

Info

Publication number
JPS56127958A
JPS56127958A JP2894080A JP2894080A JPS56127958A JP S56127958 A JPS56127958 A JP S56127958A JP 2894080 A JP2894080 A JP 2894080A JP 2894080 A JP2894080 A JP 2894080A JP S56127958 A JPS56127958 A JP S56127958A
Authority
JP
Japan
Prior art keywords
head
signal
rotary magnetic
main
magnetic head
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
JP2894080A
Other languages
Japanese (ja)
Inventor
Kanji Kubo
Mitsunobu Furumoto
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP2894080A priority Critical patent/JPS56127958A/en
Publication of JPS56127958A publication Critical patent/JPS56127958A/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
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B15/12—Masking of heads; circuits for Selecting or switching of heads between operative and inoperative functions or between different operative functions or for selection between operative heads; Masking of beams, e.g. of light beams
    • G11B15/14—Masking or switching periodically, e.g. of rotating heads

Abstract

PURPOSE:To eliminate a pulse signal detector and thus ensure an advantageous designing of a cylinder, by providing an auxiliary rotary magnetic head to the main rotary magnetic head and at a certain machanical position and then obtaining the signal showing the mechanical rotary position of the main rotary magnetic head by making use of the reproduced signal obtained from the auxiliary rotary magnetic head. CONSTITUTION:The auxiliary head 45a is installed at a certain mechanical position having an attachment angle difference of theta of the main head 10a, and always set in the reproduction mode through the recording and reproducing actions. Accordingly the rise of the RF signal reproduced through the head 45a is always set at the time position that is slower by a certain amount equivalent to the angle difference theta than the time when the main head 10a passes through the 180 deg.-winding point of the tape 2. A waveform shaping process is given to the RF signal through a wave detection/ rectification circuit and a Schmitt circuit. As a result, the head switching signal can be obtained to switch the head output at the time when the head 10a passes through the 180 deg.-winding point of the tape 2 and in the reproduction mode.
JP2894080A 1980-03-06 1980-03-06 Magnetic recorder and reproducer Pending JPS56127958A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2894080A JPS56127958A (en) 1980-03-06 1980-03-06 Magnetic recorder and reproducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2894080A JPS56127958A (en) 1980-03-06 1980-03-06 Magnetic recorder and reproducer

Publications (1)

Publication Number Publication Date
JPS56127958A true JPS56127958A (en) 1981-10-07

Family

ID=12262397

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2894080A Pending JPS56127958A (en) 1980-03-06 1980-03-06 Magnetic recorder and reproducer

Country Status (1)

Country Link
JP (1) JPS56127958A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03132958A (en) * 1989-10-18 1991-06-06 Nippon Hoso Kyokai <Nhk> Tracking control system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4854913A (en) * 1971-11-09 1973-08-02
JPS4939407A (en) * 1972-08-14 1974-04-12

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4854913A (en) * 1971-11-09 1973-08-02
JPS4939407A (en) * 1972-08-14 1974-04-12

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03132958A (en) * 1989-10-18 1991-06-06 Nippon Hoso Kyokai <Nhk> Tracking control system

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