HK20892A - Phase control method for video recorder motors - Google Patents

Phase control method for video recorder motors

Info

Publication number
HK20892A
HK20892A HK208/92A HK20892A HK20892A HK 20892 A HK20892 A HK 20892A HK 208/92 A HK208/92 A HK 208/92A HK 20892 A HK20892 A HK 20892A HK 20892 A HK20892 A HK 20892A
Authority
HK
Hong Kong
Prior art keywords
pulses
head
video recorder
drum motor
phase control
Prior art date
Application number
HK208/92A
Inventor
Hermann Link
Original Assignee
Thomson Brandt Gmbh
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 Thomson Brandt Gmbh filed Critical Thomson Brandt Gmbh
Publication of HK20892A publication Critical patent/HK20892A/en

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
    • G11B15/46—Controlling, regulating, or indicating speed
    • G11B15/467—Controlling, regulating, or indicating speed in arrangements for recording or reproducing wherein both record carriers and heads are driven
    • G11B15/473—Controlling, regulating, or indicating speed in arrangements for recording or reproducing wherein both record carriers and heads are driven by controlling the speed of the heads
    • 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
    • G11B15/46—Controlling, regulating, or indicating speed
    • G11B15/467—Controlling, regulating, or indicating speed in arrangements for recording or reproducing wherein both record carriers and heads are driven
    • 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
    • G11B15/46—Controlling, regulating, or indicating speed

Landscapes

  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

1. A method for the phase control of a head drum motor in a video recorder during the reproduction of video signals recorded on a magnetic tape using a phase comparison between the head-switching pulses and the synchronizing pulses recorded on the magnetic tape, the desired phase position of the motor being adjustable, and with a device for measuring the instantaneous deviation from the desired phase position by counting clock pulses, which are fed to a counter, between the head-switching pulse and the synchronizing pulse, characterised in that a control signal R for the head drum motor is derived from the difference between the number of actual pulses I which have entered the counter and the number of preset desired pulses S, wherein R = (I-S), if a) (I-S) is positive and less than +N/2 or b) (I-S) is negative and greater than -N/2 R = (I-S)+N, if (I-S) is negative and less than -N/2 R = (I-S)-N, if (I-S) is positive and greater than +N/2, wherein N corresponds to the number of clock pulses for one revolution of the head drum motor.
HK208/92A 1985-08-10 1992-03-19 Phase control method for video recorder motors HK20892A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19853528763 DE3528763A1 (en) 1985-08-10 1985-08-10 METHOD FOR PHASE CONTROL OF MOTORS IN VIDEO RECORDERS

Publications (1)

Publication Number Publication Date
HK20892A true HK20892A (en) 1992-03-27

Family

ID=6278230

Family Applications (1)

Application Number Title Priority Date Filing Date
HK208/92A HK20892A (en) 1985-08-10 1992-03-19 Phase control method for video recorder motors

Country Status (7)

Country Link
EP (1) EP0215234B1 (en)
JP (1) JPS6236768A (en)
KR (1) KR910000959B1 (en)
AT (1) ATE57273T1 (en)
DE (2) DE3528763A1 (en)
HK (1) HK20892A (en)
SG (1) SG9692G (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3823688A1 (en) * 1988-07-13 1990-01-18 Agfa Gevaert Ag METHOD FOR DETERMINING THE SKEW ERROR IN MAGNETIC TAPE
CN104662714B (en) * 2012-08-16 2017-09-29 艾诺维克斯公司 The electrode structure of three-dimensional batteries

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3651276A (en) * 1970-04-02 1972-03-21 Ampex Automatic phasing of servo systems
AU538020B2 (en) * 1979-02-26 1984-07-26 Sony Corporation V.t.r. servo control circuit

Also Published As

Publication number Publication date
KR870002567A (en) 1987-03-31
DE3674693D1 (en) 1990-11-08
DE3528763A1 (en) 1987-02-19
EP0215234A1 (en) 1987-03-25
JPS6236768A (en) 1987-02-17
ATE57273T1 (en) 1990-10-15
JPH0526263B2 (en) 1993-04-15
KR910000959B1 (en) 1991-02-19
SG9692G (en) 1992-03-20
EP0215234B1 (en) 1990-10-03

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Legal Events

Date Code Title Description
PF Patent in force
PC Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee)

Effective date: 20050719