GB2017352A - Transducing head servo system - Google Patents

Transducing head servo system

Info

Publication number
GB2017352A
GB2017352A GB7909590A GB7909590A GB2017352A GB 2017352 A GB2017352 A GB 2017352A GB 7909590 A GB7909590 A GB 7909590A GB 7909590 A GB7909590 A GB 7909590A GB 2017352 A GB2017352 A GB 2017352A
Authority
GB
United Kingdom
Prior art keywords
track
head
signal
envelope
applying
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
GB7909590A
Other versions
GB2017352B (en
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.)
Ampex Corp
Original Assignee
Ampex 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 Ampex Corp filed Critical Ampex Corp
Publication of GB2017352A publication Critical patent/GB2017352A/en
Application granted granted Critical
Publication of GB2017352B publication Critical patent/GB2017352B/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
    • 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
    • G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
    • G11B15/1808—Driving of both record carrier and head
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B5/584—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on tapes
    • G11B5/588—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on tapes by controlling the position of the rotating heads

Landscapes

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

Abstract

In recording and reproducing apparatus of the type which utilizes transverse positioning of the transducing head assembly to accurately follow a track during reproducing and, at the completion of the track, to position the head to either play the next adjacent successive track, replay the same track or play another track so that the appropriate special motion effect is achieved, tracking is maintained by applying a small oscillatory motion to the head to cause it to vibrate laterally of the track, examining the resulting modulation of the reproduced signal's envelope to generate a tracking error correction signal and applying this to the head assembly. A reference signal employed in the generation of the error correction signal is automatically phase synchronized in response to the head vibrations to correct errors introduced to the error signal as a result of phase changes introduced to the modulation of the reproduced signal's envelope by effects other than mistracking by the head. The speed of a tape capstan is retroactively controlled. <IMAGE>
GB7909590A 1978-03-23 1979-03-19 Transducing head servo system Expired GB2017352B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US88999478A 1978-03-23 1978-03-23

Publications (2)

Publication Number Publication Date
GB2017352A true GB2017352A (en) 1979-10-03
GB2017352B GB2017352B (en) 1982-08-25

Family

ID=25396083

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7909590A Expired GB2017352B (en) 1978-03-23 1979-03-19 Transducing head servo system

Country Status (10)

Country Link
JP (1) JPS54163618A (en)
AT (1) AT381823B (en)
BE (1) BE875025A (en)
CA (1) CA1147456A (en)
DE (1) DE2911122A1 (en)
FR (1) FR2420816B1 (en)
GB (1) GB2017352B (en)
HK (1) HK6887A (en)
IT (1) IT1115051B (en)
NL (1) NL181311C (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2482398A1 (en) * 1980-03-13 1981-11-13 Sony Corp HELICOIDAL SCANNING MAGNETOSCOPE WITH AUTOMATIC HEAD TRACING
FR2500700A1 (en) * 1981-02-24 1982-08-27 Sony Corp METHOD AND DEVICE FOR CONTROLLING THE MOVEMENT OF A RECORDING MEDIUM
EP0090666A1 (en) * 1982-03-30 1983-10-05 Sony Corporation Information signal reproducing devices
EP0091190A1 (en) * 1982-04-02 1983-10-12 Ampex Corporation A programmable nonlinear speed control for a recording and/or reproducing apparatus

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4481544A (en) * 1981-09-18 1984-11-06 Ampex Corporation Automatic tracking system with apparatus to prevent mistracking by a limited range transducer during stop motion
JPS6087422A (en) * 1983-09-19 1985-05-17 アムペックス　コーポレーション Automatic head position tracking servo system

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2260163B1 (en) * 1974-02-04 1979-08-03 Thomson Brandt
DE2423074C2 (en) * 1974-05-13 1983-09-22 Robert Bosch Gmbh, 7000 Stuttgart Device for tracking a light beam scanning head
US4080636A (en) * 1976-03-19 1978-03-21 Ampex Corporation System for damping vibrations in a deflectable transducer
US4093885A (en) * 1976-03-19 1978-06-06 Ampex Corporation Transducer assembly vibration sensor
US4106065A (en) * 1976-03-19 1978-08-08 Ampex Corporation Drive circuitry for controlling movable video head
IT1073210B (en) * 1976-03-19 1985-04-13 Ampex Corp Soc SYSTEM FOR PRODUCING SPECIAL MOVEMENT EFFECTS IN VIDEO RECORDING AND PLAYBACK DEVICES
US4151570A (en) * 1976-03-22 1979-04-24 Ampex Corporation Automatic scan tracking using a magnetic head supported by a piezoelectric bender element
US4099211A (en) * 1976-09-13 1978-07-04 Ampex Corporation Positionable transducing mounting structure and driving system therefor
GB1580008A (en) * 1977-06-04 1980-11-26 Sony Corp Automatic head tracking system
JPS5492307A (en) * 1977-12-29 1979-07-21 Sony Corp Driving circuit of electrostrictive converter
JPS54113308A (en) * 1978-02-23 1979-09-04 Sony Corp Tracking device for magnetic head

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2482398A1 (en) * 1980-03-13 1981-11-13 Sony Corp HELICOIDAL SCANNING MAGNETOSCOPE WITH AUTOMATIC HEAD TRACING
US4549234A (en) * 1981-02-04 1985-10-22 Sony Corporation Method and apparatus for tracking control
FR2500700A1 (en) * 1981-02-24 1982-08-27 Sony Corp METHOD AND DEVICE FOR CONTROLLING THE MOVEMENT OF A RECORDING MEDIUM
EP0090666A1 (en) * 1982-03-30 1983-10-05 Sony Corporation Information signal reproducing devices
US4550349A (en) * 1982-03-30 1985-10-29 Sony Corporation Playback speed controller for video tape recorder
EP0091190A1 (en) * 1982-04-02 1983-10-12 Ampex Corporation A programmable nonlinear speed control for a recording and/or reproducing apparatus

Also Published As

Publication number Publication date
AT381823B (en) 1986-12-10
JPS54163618A (en) 1979-12-26
FR2420816B1 (en) 1988-07-29
DE2911122C2 (en) 1987-07-02
NL181311B (en) 1987-02-16
HK6887A (en) 1987-01-23
CA1147456A (en) 1983-05-31
GB2017352B (en) 1982-08-25
FR2420816A1 (en) 1979-10-19
BE875025A (en) 1979-07-16
NL181311C (en) 1987-07-16
IT7948427A0 (en) 1979-03-21
IT1115051B (en) 1986-02-03
DE2911122A1 (en) 1979-09-27
ATA217279A (en) 1986-04-15
NL7902274A (en) 1979-09-25

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19950319