DK391488A - PROCEDURE AND CIRCUIT FOR AUTOMATIC ADJUSTMENT OF CONTROL AMPLIFY IN A CONTROL CIRCUIT - Google Patents

PROCEDURE AND CIRCUIT FOR AUTOMATIC ADJUSTMENT OF CONTROL AMPLIFY IN A CONTROL CIRCUIT

Info

Publication number
DK391488A
DK391488A DK391488A DK391488A DK391488A DK 391488 A DK391488 A DK 391488A DK 391488 A DK391488 A DK 391488A DK 391488 A DK391488 A DK 391488A DK 391488 A DK391488 A DK 391488A
Authority
DK
Denmark
Prior art keywords
control
gain
circuit
measurement pulse
control circuit
Prior art date
Application number
DK391488A
Other languages
Danish (da)
Other versions
DK171366B1 (en
DK391488D0 (en
Inventor
Dieter Baas
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 DK391488A publication Critical patent/DK391488A/en
Publication of DK391488D0 publication Critical patent/DK391488D0/en
Application granted granted Critical
Publication of DK171366B1 publication Critical patent/DK171366B1/en

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B13/00—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
    • G05B13/02—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0941—Methods and circuits for servo gain or phase compensation during operation
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B13/00—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
    • G05B13/02—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
    • G05B13/0205—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric not using a model or a simulator of the controlled system
    • G05B13/024—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric not using a model or a simulator of the controlled system in which a parameter or coefficient is automatically adjusted to optimise the performance
    • G05B13/025—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric not using a model or a simulator of the controlled system in which a parameter or coefficient is automatically adjusted to optimise the performance using a perturbation signal
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0945—Methods for initialising servos, start-up sequences
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0908—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only

Landscapes

  • Engineering & Computer Science (AREA)
  • Software Systems (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Evolutionary Computation (AREA)
  • Medical Informatics (AREA)
  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Transmitters (AREA)

Abstract

The gain of the track or focussing control circuit in a CD player is laborious to adjust by means of the manual setting of a potentiometer. To ensure automatic adjustment of the gain control, a measurement pulse is applied to the control circuit. The variation in the control value x provides a reference for adjusting the gain. A microcomputer MC transmits a measurement pulse to the input of the control RG until a comparator VL indicates to the microcomputer MC that the control value x has reached a predeterminable set value. The microcomputer MC determines, on the basis of the duration of the measurement pulse, whether the gain is too great or too small and adjusts it to the correct value. In the case of the track and focussing control circuit in a CD player, the measurement pulse is, for example, provided each time during switching on and/or during pauses between two pieces of music, in order to adjust the gain to the correct value. <IMAGE>
DK391488A 1986-11-13 1988-07-13 Track or focussing control circuit for an optical recording and/or reproduction apparatus DK171366B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3638831 1986-11-13
DE19863638831 DE3638831A1 (en) 1986-11-13 1986-11-13 METHOD AND CIRCUIT FOR THE AUTOMATIC SETTING OF THE CONTROL AMPLIFICATION IN A CONTROL CIRCUIT
EP8700697 1987-11-12
PCT/EP1987/000697 WO1988003671A1 (en) 1986-11-13 1987-11-12 Process and circuit for automatic setting of the gain in a control circuit

Publications (3)

Publication Number Publication Date
DK391488A true DK391488A (en) 1988-07-13
DK391488D0 DK391488D0 (en) 1988-07-13
DK171366B1 DK171366B1 (en) 1996-09-23

Family

ID=6313898

Family Applications (1)

Application Number Title Priority Date Filing Date
DK391488A DK171366B1 (en) 1986-11-13 1988-07-13 Track or focussing control circuit for an optical recording and/or reproduction apparatus

Country Status (8)

Country Link
EP (1) EP0290524B1 (en)
JP (1) JP2956765B2 (en)
KR (1) KR950015161B1 (en)
AT (1) ATE71749T1 (en)
DE (2) DE3638831A1 (en)
DK (1) DK171366B1 (en)
HK (1) HK16596A (en)
WO (1) WO1988003671A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5319539A (en) * 1992-05-27 1994-06-07 The Foxboro Company Method and apparatus for generating an optimal gain of process control equipment
US5367513A (en) * 1993-11-05 1994-11-22 International Business Machines Corporation Focus and tracking servo decoupling system
DE19757440A1 (en) 1997-12-23 1999-06-24 Thomson Brandt Gmbh Automated setting of the gain in control loops

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3727035A (en) * 1971-06-03 1973-04-10 Phillips Petroleum Co Pulse test of digital control system
US4096425A (en) * 1974-09-19 1978-06-20 Ferranti Limited Servo systems
US4466087A (en) * 1981-01-08 1984-08-14 Xerox Corporation Optical memory system for a reading/writing, verifying and tracking module
JPS6148162A (en) * 1984-08-14 1986-03-08 Sony Corp Disc loading device
JPS61208102A (en) * 1985-03-13 1986-09-16 Mitsubishi Electric Corp Automatic tuning controller
JPS61226803A (en) * 1985-03-30 1986-10-08 Toshiba Corp Process control device

Also Published As

Publication number Publication date
JPH01501349A (en) 1989-05-11
KR890700239A (en) 1989-03-10
WO1988003671A1 (en) 1988-05-19
DE3638831A1 (en) 1988-05-19
DK171366B1 (en) 1996-09-23
ATE71749T1 (en) 1992-02-15
EP0290524A1 (en) 1988-11-17
EP0290524B1 (en) 1992-01-15
HK16596A (en) 1996-02-02
KR950015161B1 (en) 1995-12-23
DK391488D0 (en) 1988-07-13
JP2956765B2 (en) 1999-10-04
DE3776140D1 (en) 1992-02-27

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Legal Events

Date Code Title Description
B1 Patent granted (law 1993)
PUP Patent expired