FR2319934A1 - Damping of unwanted inertial movements of loudspeaker coil - uses development of compensating voltage from magnetoresistance fixed to coil - Google Patents

Damping of unwanted inertial movements of loudspeaker coil - uses development of compensating voltage from magnetoresistance fixed to coil

Info

Publication number
FR2319934A1
FR2319934A1 FR7524144A FR7524144A FR2319934A1 FR 2319934 A1 FR2319934 A1 FR 2319934A1 FR 7524144 A FR7524144 A FR 7524144A FR 7524144 A FR7524144 A FR 7524144A FR 2319934 A1 FR2319934 A1 FR 2319934A1
Authority
FR
France
Prior art keywords
coil
resistance
fixed
magnetoresistance
damping
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
FR7524144A
Other languages
French (fr)
Other versions
FR2319934B1 (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.)
RABAULT JACQUES
Original Assignee
RABAULT JACQUES
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 RABAULT JACQUES filed Critical RABAULT JACQUES
Priority to FR7524144A priority Critical patent/FR2319934A1/en
Priority to DE19767623575 priority patent/DE7623575U1/en
Publication of FR2319934A1 publication Critical patent/FR2319934A1/en
Application granted granted Critical
Publication of FR2319934B1 publication Critical patent/FR2319934B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/002—Damping circuit arrangements for transducers, e.g. motional feedback circuits

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

The system controls a movable coil (1) placed in a magnetic field as in a loudspeaker onto the winding is fixed a magneto resistance (6) whose ohmic resistance is a function of the ambient magnetic field. The variations of the field enables one to obtain at the resistance terminals a voltage proportion to the coil displacement for control of undesired motion, caused for example by the coils inertia. After amplification (5) the voltage is shaped corrected and then injected into the coil circuit. At rest in the absence of the modulated AC signal, no current is injected. The magneto resistance (6) is connected to a corrector amplifier (7) this amplifier being connected to the terminals of a resistance (8) inserted in the movable winding circuit (4).
FR7524144A 1975-08-01 1975-08-01 Damping of unwanted inertial movements of loudspeaker coil - uses development of compensating voltage from magnetoresistance fixed to coil Granted FR2319934A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR7524144A FR2319934A1 (en) 1975-08-01 1975-08-01 Damping of unwanted inertial movements of loudspeaker coil - uses development of compensating voltage from magnetoresistance fixed to coil
DE19767623575 DE7623575U1 (en) 1975-08-01 1976-07-27 MOVING VIBRATING COIL, IN PARTICULAR FOR SPEAKERS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7524144A FR2319934A1 (en) 1975-08-01 1975-08-01 Damping of unwanted inertial movements of loudspeaker coil - uses development of compensating voltage from magnetoresistance fixed to coil

Publications (2)

Publication Number Publication Date
FR2319934A1 true FR2319934A1 (en) 1977-02-25
FR2319934B1 FR2319934B1 (en) 1980-05-16

Family

ID=9158680

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7524144A Granted FR2319934A1 (en) 1975-08-01 1975-08-01 Damping of unwanted inertial movements of loudspeaker coil - uses development of compensating voltage from magnetoresistance fixed to coil

Country Status (2)

Country Link
DE (1) DE7623575U1 (en)
FR (1) FR2319934A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4163119A (en) * 1976-09-27 1979-07-31 Hitachi, Ltd. Protective circuit for electroacoustic transducer with hall element and voice coil temperature rise time constant circuit
US4176305A (en) * 1976-12-23 1979-11-27 Siemens Aktiengesellschaft Galvano magnetic position control system
WO1994021093A1 (en) * 1993-03-08 1994-09-15 Pierre Piccaluga Process and apparatus for improving the sound reproduction quality of electroacoustic transducers

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4163119A (en) * 1976-09-27 1979-07-31 Hitachi, Ltd. Protective circuit for electroacoustic transducer with hall element and voice coil temperature rise time constant circuit
US4176305A (en) * 1976-12-23 1979-11-27 Siemens Aktiengesellschaft Galvano magnetic position control system
WO1994021093A1 (en) * 1993-03-08 1994-09-15 Pierre Piccaluga Process and apparatus for improving the sound reproduction quality of electroacoustic transducers
FR2702624A1 (en) * 1993-03-08 1994-09-16 Piccaluga Pierre Method and apparatus for improving the quality of sound reproduction by electro-acoustic transducers

Also Published As

Publication number Publication date
FR2319934B1 (en) 1980-05-16
DE7623575U1 (en) 1976-11-11

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Legal Events

Date Code Title Description
ST Notification of lapse