JPS57117163A - Field pulse generating circuit - Google Patents

Field pulse generating circuit

Info

Publication number
JPS57117163A
JPS57117163A JP56001476A JP147681A JPS57117163A JP S57117163 A JPS57117163 A JP S57117163A JP 56001476 A JP56001476 A JP 56001476A JP 147681 A JP147681 A JP 147681A JP S57117163 A JPS57117163 A JP S57117163A
Authority
JP
Japan
Prior art keywords
tracking
feed
specified value
input terminal
component
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.)
Granted
Application number
JP56001476A
Other languages
Japanese (ja)
Other versions
JPS631668B2 (en
Inventor
Susumu Sakakibara
Ryozo Abe
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.)
Victor Company of Japan Ltd
Nippon Victor KK
Original Assignee
Victor Company of Japan Ltd
Nippon Victor KK
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 Victor Company of Japan Ltd, Nippon Victor KK filed Critical Victor Company of Japan Ltd
Priority to JP56001476A priority Critical patent/JPS57117163A/en
Publication of JPS57117163A publication Critical patent/JPS57117163A/en
Publication of JPS631668B2 publication Critical patent/JPS631668B2/ja
Granted 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

Abstract

PURPOSE:To feed while tracking a reproduction element stably, by detecting a DC component in a tracking error signal periodically, and gradually increasing the width of feed pulse when the detected value beyond a specified value continues for many times. CONSTITUTION:A tracking error signal incoming to an input terminal 1 is applied to an inverting input terminal of an operational amplifier 17, and a low level signal is outputted when the DC component is a specified value or more, and outputs a high level signal when smaller. This output signal is given to a microcomputer 18, and when the detected value more than a specified value keeps for a plurality of number of times, a feed pulse width applied to a playback element carrying feed motor is gradually increased. Thus, the circuit constitution is made simple and feeding is made stably while tracking the playback element.
JP56001476A 1981-01-08 1981-01-08 Field pulse generating circuit Granted JPS57117163A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56001476A JPS57117163A (en) 1981-01-08 1981-01-08 Field pulse generating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56001476A JPS57117163A (en) 1981-01-08 1981-01-08 Field pulse generating circuit

Publications (2)

Publication Number Publication Date
JPS57117163A true JPS57117163A (en) 1982-07-21
JPS631668B2 JPS631668B2 (en) 1988-01-13

Family

ID=11502498

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56001476A Granted JPS57117163A (en) 1981-01-08 1981-01-08 Field pulse generating circuit

Country Status (1)

Country Link
JP (1) JPS57117163A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0638897A2 (en) * 1993-08-11 1995-02-15 Matsushita Electric Industrial Co., Ltd. Tracking error detection circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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.

Also Published As

Publication number Publication date
JPS631668B2 (en) 1988-01-13

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