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JPS56117328A - Information reproducing device - Google Patents

Information reproducing device

Info

Publication number
JPS56117328A
JPS56117328A JP2027080A JP2027080A JPS56117328A JP S56117328 A JPS56117328 A JP S56117328A JP 2027080 A JP2027080 A JP 2027080A JP 2027080 A JP2027080 A JP 2027080A JP S56117328 A JPS56117328 A JP S56117328A
Authority
JP
Japan
Prior art keywords
information
tracking error
detecting means
detection signal
pulse width
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
JP2027080A
Other languages
Japanese (ja)
Inventor
Shinichi Tanaka
Tsuneo Hirose
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 JP2027080A priority Critical patent/JPS56117328A/en
Publication of JPS56117328A publication Critical patent/JPS56117328A/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
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/02—Driving or moving of heads
    • G11B21/10—Track finding or aligning by moving the head ; Provisions for maintaining alignment of the head relative to the track during transducing operation, i.e. track following

Landscapes

  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)

Abstract

PURPOSE:To simplify constitution and to facilitate adjustments, by composing a tracking error detecting means of a peak position detecting means for an envelope detection signal, pulse width modulating means and pulse width demodulating means. CONSTITUTION:This device reproduce information from an information track on which the information is recorded in a belt shape; an information reproducing means is oscillated at constant periods with smaller amplitude than the width of the information track, and from the envelope detection signal of the reproduced signal of information through the oscillation, the tracking error of the information reproducing means is detected. The tracking error detecting means leads the detection signal from envelope detector 10 to the peak position detecting means consisting of differentiator 12 and comparator 14 to detect the position of the maximum value, and a rectangular wave having the same width as the time interval of the position of the maximum value is generated by flip-flop circuit 15 and then led to low-pass filter 16 for pulse width demodulation, so that the tracking error signal can easily be obtained.
JP2027080A 1980-02-19 1980-02-19 Information reproducing device Pending JPS56117328A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2027080A JPS56117328A (en) 1980-02-19 1980-02-19 Information reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2027080A JPS56117328A (en) 1980-02-19 1980-02-19 Information reproducing device

Publications (1)

Publication Number Publication Date
JPS56117328A true JPS56117328A (en) 1981-09-14

Family

ID=12022489

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2027080A Pending JPS56117328A (en) 1980-02-19 1980-02-19 Information reproducing device

Country Status (1)

Country Link
JP (1) JPS56117328A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0441399A2 (en) * 1990-02-09 1991-08-14 Canon Kabushiki Kaisha Position displacement detecting apparatus
EP0638897A2 (en) * 1993-08-11 1995-02-15 Matsushita Electric Industrial Co., Ltd. Tracking error detection circuit
US5404349A (en) * 1990-02-09 1995-04-04 Canon Kabushiki Kaisha Position displacement detecting apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0441399A2 (en) * 1990-02-09 1991-08-14 Canon Kabushiki Kaisha Position displacement detecting apparatus
US5404349A (en) * 1990-02-09 1995-04-04 Canon Kabushiki Kaisha Position displacement detecting apparatus
EP0638897A2 (en) * 1993-08-11 1995-02-15 Matsushita Electric Industrial Co., Ltd. Tracking error detection circuit
EP0638897A3 (en) * 1993-08-11 1996-12-27 Matsushita Electric Ind Co Ltd Tracking error detection circuit.

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