JPS5658140A - Tracking servo device for information reader - Google Patents

Tracking servo device for information reader

Info

Publication number
JPS5658140A
JPS5658140A JP13228579A JP13228579A JPS5658140A JP S5658140 A JPS5658140 A JP S5658140A JP 13228579 A JP13228579 A JP 13228579A JP 13228579 A JP13228579 A JP 13228579A JP S5658140 A JPS5658140 A JP S5658140A
Authority
JP
Japan
Prior art keywords
signal
gate
level
turned
servo
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
JP13228579A
Other languages
Japanese (ja)
Other versions
JPS6045483B2 (en
Inventor
Minoru Kosake
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.)
Pioneer Video Corp
Universal Pioneer Corp
Original Assignee
Pioneer Video Corp
Universal Pioneer 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 Pioneer Video Corp, Universal Pioneer Corp filed Critical Pioneer Video Corp
Priority to JP54132285A priority Critical patent/JPS6045483B2/en
Priority to US06/196,148 priority patent/US4340950A/en
Priority to DE19803038650 priority patent/DE3038650C2/en
Priority to GB8032959A priority patent/GB2061072B/en
Publication of JPS5658140A publication Critical patent/JPS5658140A/en
Priority to GB08318878A priority patent/GB2134356B/en
Publication of JPS6045483B2 publication Critical patent/JPS6045483B2/en
Expired 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

  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)

Abstract

PURPOSE:To secure a steady and assured lock-in for the servo, by closing the servo pool when the level of the tracking error signal becomes lower than the fixed level and at the same time the level of the aural carrier signal becomes higher than the fixed level. CONSTITUTION:The servocontrol spots 1 and 2 are converted into the electric signals, and the error signal showing the difference signal is obtained through the differential amplifier 8. This error signal is supplied to the coil 13 which drives the tracking mirror and at the same time compared with the reference voltage V1 to be turned into the pulse signal. This pulse signal is supplied to the AND gate 17 after a differentiation. The reading spot 3 is turned into the reproduced RF signal and then separated into the aural information signal and the video information signal. The RF signal is compared with the reference voltage V2 after receiving a wave detection through the level detecting circuit 27 and then turned into the pulse signal to be used as the gate signal of the gate 17. Then the switch 10 is closed by the timing of the output signal of the gate 17, and the servo loop is closed.
JP54132285A 1979-10-12 1979-10-13 Tracking servo device in information reading device Expired JPS6045483B2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP54132285A JPS6045483B2 (en) 1979-10-13 1979-10-13 Tracking servo device in information reading device
US06/196,148 US4340950A (en) 1979-10-12 1980-10-10 Video disc player
DE19803038650 DE3038650C2 (en) 1979-10-12 1980-10-13 Apparatus for reproducing information read from a video disc
GB8032959A GB2061072B (en) 1979-10-12 1980-10-13 Video disc player
GB08318878A GB2134356B (en) 1979-10-12 1983-07-13 Video disc player

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54132285A JPS6045483B2 (en) 1979-10-13 1979-10-13 Tracking servo device in information reading device

Publications (2)

Publication Number Publication Date
JPS5658140A true JPS5658140A (en) 1981-05-21
JPS6045483B2 JPS6045483B2 (en) 1985-10-09

Family

ID=15077702

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54132285A Expired JPS6045483B2 (en) 1979-10-12 1979-10-13 Tracking servo device in information reading device

Country Status (1)

Country Link
JP (1) JPS6045483B2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61122939A (en) * 1985-10-18 1986-06-10 Hitachi Ltd Tracking servo control device of recording information reproducing device
US4616353A (en) * 1983-04-14 1986-10-07 Victor Company Of Japan Ltd. Tracking servo with closed loop gain correction
JPS61258341A (en) * 1985-05-13 1986-11-15 Olympus Optical Co Ltd Optical information recording and reproducing device
JPS628338A (en) * 1985-07-03 1987-01-16 Pioneer Electronic Corp Tracking servo circuit
US4660191A (en) * 1983-12-01 1987-04-21 Pioneer Electronic Corporation Tracking signal error generator for optical information devices
KR100767934B1 (en) 2006-07-05 2007-10-17 주식회사 대우일렉트로닉스 Tracking error detecting method and optical information reproducing apparatus using the same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51117005A (en) * 1975-04-07 1976-10-14 Hitachi Ltd Tracking absorption equipment
JPS5226802A (en) * 1975-08-21 1977-02-28 Philips Nv Device for reading diskklike recording carrier

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51117005A (en) * 1975-04-07 1976-10-14 Hitachi Ltd Tracking absorption equipment
JPS5226802A (en) * 1975-08-21 1977-02-28 Philips Nv Device for reading diskklike recording carrier

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4616353A (en) * 1983-04-14 1986-10-07 Victor Company Of Japan Ltd. Tracking servo with closed loop gain correction
US4660191A (en) * 1983-12-01 1987-04-21 Pioneer Electronic Corporation Tracking signal error generator for optical information devices
JPS61258341A (en) * 1985-05-13 1986-11-15 Olympus Optical Co Ltd Optical information recording and reproducing device
JPH0740367B2 (en) * 1985-05-13 1995-05-01 オリンパス光学工業株式会社 Optical information recording / reproducing device
JPS628338A (en) * 1985-07-03 1987-01-16 Pioneer Electronic Corp Tracking servo circuit
JP2553499B2 (en) * 1985-07-03 1996-11-13 パイオニア株式会社 Tracking servo circuit
JPS61122939A (en) * 1985-10-18 1986-06-10 Hitachi Ltd Tracking servo control device of recording information reproducing device
JPH0468689B2 (en) * 1985-10-18 1992-11-04 Hitachi Ltd
KR100767934B1 (en) 2006-07-05 2007-10-17 주식회사 대우일렉트로닉스 Tracking error detecting method and optical information reproducing apparatus using the same

Also Published As

Publication number Publication date
JPS6045483B2 (en) 1985-10-09

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