FR2420891A1 - Circuit detecteur d'enveloppe hf automatiquement etalonne, notamment pour magnetoscopes - Google Patents

Circuit detecteur d'enveloppe hf automatiquement etalonne, notamment pour magnetoscopes

Info

Publication number
FR2420891A1
FR2420891A1 FR7907282A FR7907282A FR2420891A1 FR 2420891 A1 FR2420891 A1 FR 2420891A1 FR 7907282 A FR7907282 A FR 7907282A FR 7907282 A FR7907282 A FR 7907282A FR 2420891 A1 FR2420891 A1 FR 2420891A1
Authority
FR
France
Prior art keywords
track
vcrs
envelope detector
detector circuit
automatically calibrated
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
FR7907282A
Other languages
English (en)
Other versions
FR2420891B1 (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 FR2420891A1 publication Critical patent/FR2420891A1/fr
Application granted granted Critical
Publication of FR2420891B1 publication Critical patent/FR2420891B1/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
    • 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)

Abstract

Circuit détecteur d'enveloppes HF automatiquement étalonné, notamment pour magnétoscopes. Il utilise un positionnement transversal de la tête transductrice pour obtenir un effet tel que ralenti, arrêt ou accéléré. Pour maintenir précisément la tête sur la piste voulue, on la fait vibrer latéralement par rapport à la piste, ce qui provoque une modulation d'amplitude du signal reproduit, en réponse auquel un circuit d'asservissement assure un ajustement continu de la position de la tête et la maintient en relation de reproduction optimale avec la piste. Applicable notamment aux appareils à balayage hélicoïdal.
FR7907282A 1978-03-23 1979-03-22 Circuit detecteur d'enveloppe hf automatiquement etalonne, notamment pour magnetoscopes Expired FR2420891B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/889,597 US4197564A (en) 1978-03-23 1978-03-23 Automatically calibrated RF envelope detector circuit

Publications (2)

Publication Number Publication Date
FR2420891A1 true FR2420891A1 (fr) 1979-10-19
FR2420891B1 FR2420891B1 (fr) 1986-09-19

Family

ID=25395423

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7907282A Expired FR2420891B1 (fr) 1978-03-23 1979-03-22 Circuit detecteur d'enveloppe hf automatiquement etalonne, notamment pour magnetoscopes

Country Status (11)

Country Link
US (1) US4197564A (fr)
JP (1) JPS54163617A (fr)
AT (1) AT380606B (fr)
BE (1) BE875024A (fr)
CA (1) CA1128199A (fr)
DE (1) DE2911083A1 (fr)
FR (1) FR2420891B1 (fr)
GB (1) GB2035731B (fr)
HK (1) HK7087A (fr)
IT (1) IT1115052B (fr)
NL (1) NL181391C (fr)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54138324A (en) * 1978-04-19 1979-10-26 Sony Corp Magnetic recording and reproducing unit
AU539426B2 (en) * 1979-03-15 1984-09-27 Sony Corporation Automatic head height control apparatus
EP0037738B1 (fr) * 1980-04-08 1983-08-17 Minnesota Mining And Manufacturing Company Dispositif automatique de commande d'asservissement de tracé pour magnétoscopes à balayage hélicoidal
US4470079A (en) * 1981-02-13 1984-09-04 Victor Company Of Japan, Ltd. Tracking control system in a magnetic recording and reproducing apparatus
JPS57170680A (en) * 1981-04-13 1982-10-20 Matsushita Electric Ind Co Ltd Magnetic recorder and reproducer
JPS57203228A (en) * 1981-06-09 1982-12-13 Sony Corp Tracking adjuster
GB2124052B (en) * 1982-05-06 1985-11-13 Questech Ltd Reducing cross-colour in colour television decoding apparatus
US4595960A (en) * 1982-11-03 1986-06-17 Rca Corporation Phase-reversed dithered automatic scan tracking system
US4843496A (en) * 1986-10-29 1989-06-27 Eastman Kodak Company Track-finding servomechanism utilizing the sampled output of an envelope comparison
US5001579A (en) * 1988-05-27 1991-03-19 Eastman Kodak Company Method and apparatus for centering a transducer over a recorded track on a rotary storage medium
US5113525A (en) * 1989-11-06 1992-05-12 Mitsubishi Denki Kabushiki Kaisha Linear-modulation type radio transmitter
JPH04311854A (ja) * 1991-04-11 1992-11-04 Sony Corp トラッキング調整回路
US5243473A (en) * 1991-08-06 1993-09-07 R-Byte, Inc. Automatic helical scan head drum calibration and track timing generation
US5656779A (en) * 1992-12-04 1997-08-12 Trw Inc. Apparatus and method for producing structural and acoustic vibrations
US5774299A (en) * 1996-08-13 1998-06-30 Seagate Technology, Inc. Adaptive calibration of read/write elements in a disc drive
US7240250B2 (en) * 2002-08-29 2007-07-03 Seagate Technology Llc Head degradation characterization for a data storage device
JP4134066B2 (ja) * 2005-02-24 2008-08-13 富士通株式会社 ヘッド位置検出方法および記録媒体駆動装置
JP2007115349A (ja) * 2005-10-20 2007-05-10 Orion Denki Kk リピート再生機能を備えた再生装置及びリピート再生機能実行プログラム及びリピート範囲の再設定方法
US11567549B2 (en) * 2019-05-31 2023-01-31 Texas Instruments Incorporated Reset circuit for battery management system

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3375331A (en) * 1963-10-21 1968-03-26 Nippon Electric Co System for recording and reproducing a periodic signal
DE1774833C3 (de) * 1967-09-20 1980-05-14 Sony Corp., Tokio Magnetbandwiedergabegerät
GB1312853A (en) * 1969-09-30 1973-04-11 Sanyo Electric Co Video tape recorders
US3663764A (en) * 1970-04-06 1972-05-16 Ampex Automatic tracking circuit for transverse scan magnetic tape transport
DE2216077C3 (de) * 1972-04-01 1978-04-20 Loewe Opta Gmbh, 1000 Berlin Automatische Spurabtast-Regelschaltung für Video-Magnetband-Aufzeichnungsund Wiedergabegerät
JPS5650329B2 (fr) * 1972-05-22 1981-11-28
JPS5633772B2 (fr) * 1972-12-20 1981-08-06
JPS598891B2 (ja) * 1974-11-26 1984-02-28 ソニー株式会社 回転磁気ヘッド装置
JPS587117B2 (ja) * 1975-10-01 1983-02-08 ソニー株式会社 イロシンゴウシヨリカイロ
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
US4165523A (en) * 1976-03-19 1979-08-21 Ampex Corporation Automatic scan tracking using an additional sensing means on a bimorph
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
JPS5466809A (en) * 1977-11-08 1979-05-29 Matsushita Electric Ind Co Ltd Magnetic reproducer

Also Published As

Publication number Publication date
IT1115052B (it) 1986-02-03
JPS54163617A (en) 1979-12-26
GB2035731B (en) 1982-07-07
NL7902273A (nl) 1979-09-25
HK7087A (en) 1987-01-23
DE2911083C2 (fr) 1987-01-15
FR2420891B1 (fr) 1986-09-19
CA1128199A (fr) 1982-07-20
ATA217179A (de) 1985-10-15
DE2911083A1 (de) 1979-09-27
BE875024A (fr) 1979-07-16
NL181391B (nl) 1987-03-02
IT7948426A0 (it) 1979-03-21
US4197564A (en) 1980-04-08
NL181391C (nl) 1987-08-03
AT380606B (de) 1986-06-25
GB2035731A (en) 1980-06-18

Similar Documents

Publication Publication Date Title
FR2420891A1 (fr) Circuit detecteur d'enveloppe hf automatiquement etalonne, notamment pour magnetoscopes
JPS5337029A (en) Beam recorder
FR2362542A1 (fr) Appareil de reproduction de signaux notamment video
JPS5369006A (en) Reproducer of disc form signal recording media
FR2418987A1 (fr) Appareil de reproduction de signaux video comportant un dispositif de commande d'asservissement de poursuite
JPS53131804A (en) Tone arm device
DE3168073D1 (en) Video signal reproducing apparatus
JPS56136390A (en) Recording by laser
JPS56111112A (en) Tape recorder
JPS5512943A (en) Sound recorder for simultaneous sound recording type cine camera
JPS55146602A (en) Cutting device
JPS5377511A (en) Recorder/reproducer
JPS542109A (en) Magnetic reproducer
JPS5239310A (en) Video recorder
JPS5698743A (en) Leading device for tone arm
JPS573243A (en) Reproducer jumping part
JPS57141001A (en) Cutter head supporting device in recording device for record original disc
DE3166970D1 (en) Bias control method and apparatus for magnetic recording
JPS52104863A (en) Automatic contrast adjusting device for video signal
JPS5417710A (en) Pusle recording system
JPS536528A (en) Recording and reproduction system
JPS536008A (en) Record-reproduce device
JPS53119013A (en) Magnetic recording device
JPS5642476A (en) Still-picture reproducing device of magnetic recording and reproducing device
JPS57123507A (en) Voice recorder

Legal Events

Date Code Title Description
ST Notification of lapse