JPS56153562A - Recorder and reproducer - Google Patents

Recorder and reproducer

Info

Publication number
JPS56153562A
JPS56153562A JP5593580A JP5593580A JPS56153562A JP S56153562 A JPS56153562 A JP S56153562A JP 5593580 A JP5593580 A JP 5593580A JP 5593580 A JP5593580 A JP 5593580A JP S56153562 A JPS56153562 A JP S56153562A
Authority
JP
Japan
Prior art keywords
external scale
count
constitution
track
movement
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
JP5593580A
Other languages
Japanese (ja)
Other versions
JPH0230110B2 (en
Inventor
Mitsuro Moriya
Masahiro Deguchi
Noboru Wakami
Yasuhiro Goto
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 JP5593580A priority Critical patent/JPS56153562A/en
Publication of JPS56153562A publication Critical patent/JPS56153562A/en
Publication of JPH0230110B2 publication Critical patent/JPH0230110B2/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
    • G11B21/08—Track changing or selecting during transducing operation
    • G11B21/081—Access to indexed tracks or parts of continuous track

Abstract

PURPOSE:To enable to retrieve in high speed with a simple constitution and high reliability, by controlling the relative movement between the conversion means for playback and recording medium through the count of track crossing signal and external scale signal with switching. CONSTITUTION:Based on the count of amount of position movement to the desired track by the information processing controller 1, the amount of shift according to the external scale of the N-th power (where; N is a positive real number greater than 1) of the track pitch 2 and the track crossing number corresponding to the fraction of external scale are set to the 1st and 2nd registers 2, 3. Further, the switching of the switches 4, 5 and 12 via the device 1 is controlled to separately switch the count of the external scale and track crossing number, and the relative movement between th playback conversion means and recording medium can be controlled with the coincident output from the 1st and 2nd comparison circuits 10, 11 via the AND gate 12. Thus, high speed retrieval with high reliability can be made by using the constitution of a simple external scale, except slow speed for the vicinity of start and end of the movement.
JP5593580A 1980-04-26 1980-04-26 Recorder and reproducer Granted JPS56153562A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5593580A JPS56153562A (en) 1980-04-26 1980-04-26 Recorder and reproducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5593580A JPS56153562A (en) 1980-04-26 1980-04-26 Recorder and reproducer

Publications (2)

Publication Number Publication Date
JPS56153562A true JPS56153562A (en) 1981-11-27
JPH0230110B2 JPH0230110B2 (en) 1990-07-04

Family

ID=13012927

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5593580A Granted JPS56153562A (en) 1980-04-26 1980-04-26 Recorder and reproducer

Country Status (1)

Country Link
JP (1) JPS56153562A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4745587A (en) * 1985-03-22 1988-05-17 Hitachi, Ltd. Eccentricity correction during optical head accessing of a desired track
US5048001A (en) * 1989-04-07 1991-09-10 Matsushita Electric Industrial Co., Ltd. Load correction method for an information retrieval apparatus
US5109366A (en) * 1988-04-14 1992-04-28 Matsushita Electric Industrial Co., Ltd. Slip-off preventing tracking control apparatus
JPH0666956A (en) * 1991-04-26 1994-03-11 Yokokawa Uezatsuku Kk Rain and snow gage

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS549376A (en) * 1977-06-24 1979-01-24 Nec Corp Servo control system
JPS5480719A (en) * 1977-12-12 1979-06-27 Fujitsu Ltd Positioning device for magnetic head
JPS5493788A (en) * 1977-12-31 1979-07-25 Ricoh Co Ltd Speed signal detector

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS549376A (en) * 1977-06-24 1979-01-24 Nec Corp Servo control system
JPS5480719A (en) * 1977-12-12 1979-06-27 Fujitsu Ltd Positioning device for magnetic head
JPS5493788A (en) * 1977-12-31 1979-07-25 Ricoh Co Ltd Speed signal detector

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4745587A (en) * 1985-03-22 1988-05-17 Hitachi, Ltd. Eccentricity correction during optical head accessing of a desired track
US5109366A (en) * 1988-04-14 1992-04-28 Matsushita Electric Industrial Co., Ltd. Slip-off preventing tracking control apparatus
US5048001A (en) * 1989-04-07 1991-09-10 Matsushita Electric Industrial Co., Ltd. Load correction method for an information retrieval apparatus
JPH0666956A (en) * 1991-04-26 1994-03-11 Yokokawa Uezatsuku Kk Rain and snow gage

Also Published As

Publication number Publication date
JPH0230110B2 (en) 1990-07-04

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