FR2420816A1 - Asservissement de tete transductrice mobile a com pensation automatique - Google Patents

Asservissement de tete transductrice mobile a com pensation automatique

Info

Publication number
FR2420816A1
FR2420816A1 FR7907283A FR7907283A FR2420816A1 FR 2420816 A1 FR2420816 A1 FR 2420816A1 FR 7907283 A FR7907283 A FR 7907283A FR 7907283 A FR7907283 A FR 7907283A FR 2420816 A1 FR2420816 A1 FR 2420816A1
Authority
FR
France
Prior art keywords
head
automatic compensation
signal
transducer head
envelope
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
FR7907283A
Other languages
English (en)
Other versions
FR2420816B1 (fr
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 FR2420816A1 publication Critical patent/FR2420816A1/fr
Application granted granted Critical
Publication of FR2420816B1 publication Critical patent/FR2420816B1/fr
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

Asservissement de tête transductrice mobile à compensation automatique. Pour obtenir des effets spéciaux, un montage maintient la tête sur la piste convenable en la faisant vibrer latéralement, en examinant la modulation résultante de l'enveloppe du signal reproduit pour former un signal de correction d'erreur d'exploration de liste et l'appliquer à la tête Le signal de référence servant à former le signal de correction d'erreur est automatiquement synchronisé en phase en réponse aux vibrations de tete pour corriger des erreurs de signal d'erreur causées par des changements de phase introduits dans la modulation de l'enveloppe par des effets autres que des défauts d'exploration de piste. Applicable notamment aux appareils à balayage hélicoïdal.
FR7907283A 1978-03-23 1979-03-22 Asservissement de tete transductrice mobile a com pensation automatique Expired FR2420816B1 (fr)

Applications Claiming Priority (1)

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

Publications (2)

Publication Number Publication Date
FR2420816A1 true FR2420816A1 (fr) 1979-10-19
FR2420816B1 FR2420816B1 (fr) 1988-07-29

Family

ID=25396083

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7907283A Expired FR2420816B1 (fr) 1978-03-23 1979-03-22 Asservissement de tete transductrice mobile a com pensation automatique

Country Status (10)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2513464A1 (fr) * 1981-09-18 1983-03-25 Ampex Systeme de poursuite automatique d'image vraie a auto-centrage

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56127925A (en) * 1980-03-13 1981-10-07 Sony Corp Tracking device of magnetic head
JPS57140083A (en) * 1981-02-24 1982-08-30 Sony Corp Video signal reproducing device
JPS58169360A (ja) * 1982-03-30 1983-10-05 Sony Corp ビデオ信号再生装置
DE3376597D1 (en) * 1982-04-02 1988-06-16 Ampex A programmable nonlinear speed control for a recording and/or reproducing apparatus
JPS6087422A (ja) * 1983-09-19 1985-05-17 アムペックス　コーポレーション 自動ヘツド位置トラツキングサ−ボ方式

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2260163A1 (fr) * 1974-02-04 1975-08-29 Thomson Brandt
DE2423074A1 (de) * 1974-05-13 1975-11-27 Bosch Gmbh Robert Einrichtung zur spurfuehrung eines lichtstrahlabtastkopfes bei speichergeraeten
FR2344913A1 (fr) * 1976-03-19 1977-10-14 Ampex Systeme d'amortissement des vibrations d'un transducteur deviable
FR2345779A1 (fr) * 1976-03-22 1977-10-21 Ampex Dispositif d'exploration de piste avec alignement automatique
DE2741217A1 (de) * 1976-09-13 1978-03-16 Ampex Bewegliche halterung mit antriebsvorrichtung fuer einen relativ zu einem aufzeichnungstraeger bewegbaren wandler
FR2393391A1 (fr) * 1977-06-04 1978-12-29 Sony Corp Appareil de reproduction avec alignement automatique de tete
FR2413840A1 (fr) * 1977-12-29 1979-07-27 Sony Corp Circuit de commande pour transducteur piezoelectrique

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4093885A (en) * 1976-03-19 1978-06-06 Ampex Corporation Transducer assembly vibration sensor
IT1073210B (it) * 1976-03-19 1985-04-13 Ampex Corp Soc Sistema per produrre effetti speciali di movimento in apparecchi di registrazione e riproduzione video
US4106065A (en) * 1976-03-19 1978-08-08 Ampex Corporation Drive circuitry for controlling movable video head
JPS54113308A (en) * 1978-02-23 1979-09-04 Sony Corp Tracking device for magnetic head

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2260163A1 (fr) * 1974-02-04 1975-08-29 Thomson Brandt
DE2423074A1 (de) * 1974-05-13 1975-11-27 Bosch Gmbh Robert Einrichtung zur spurfuehrung eines lichtstrahlabtastkopfes bei speichergeraeten
FR2344913A1 (fr) * 1976-03-19 1977-10-14 Ampex Systeme d'amortissement des vibrations d'un transducteur deviable
US4080636A (en) * 1976-03-19 1978-03-21 Ampex Corporation System for damping vibrations in a deflectable transducer
FR2345779A1 (fr) * 1976-03-22 1977-10-21 Ampex Dispositif d'exploration de piste avec alignement automatique
US4151570A (en) * 1976-03-22 1979-04-24 Ampex Corporation Automatic scan tracking using a magnetic head supported by a piezoelectric bender element
DE2741217A1 (de) * 1976-09-13 1978-03-16 Ampex Bewegliche halterung mit antriebsvorrichtung fuer einen relativ zu einem aufzeichnungstraeger bewegbaren wandler
FR2393391A1 (fr) * 1977-06-04 1978-12-29 Sony Corp Appareil de reproduction avec alignement automatique de tete
FR2413840A1 (fr) * 1977-12-29 1979-07-27 Sony Corp Circuit de commande pour transducteur piezoelectrique

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2513464A1 (fr) * 1981-09-18 1983-03-25 Ampex Systeme de poursuite automatique d'image vraie a auto-centrage

Also Published As

Publication number Publication date
IT1115051B (it) 1986-02-03
AT381823B (de) 1986-12-10
NL7902274A (nl) 1979-09-25
GB2017352A (en) 1979-10-03
IT7948427A0 (it) 1979-03-21
DE2911122A1 (de) 1979-09-27
FR2420816B1 (fr) 1988-07-29
NL181311C (nl) 1987-07-16
JPS54163618A (en) 1979-12-26
BE875025A (fr) 1979-07-16
DE2911122C2 (fr) 1987-07-02
CA1147456A (fr) 1983-05-31
HK6887A (en) 1987-01-23
GB2017352B (en) 1982-08-25
ATA217279A (de) 1986-04-15
NL181311B (nl) 1987-02-16

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Legal Events

Date Code Title Description
ST Notification of lapse