GB1276344A - Dynamic feedback amplifier - Google Patents

Dynamic feedback amplifier

Info

Publication number
GB1276344A
GB1276344A GB43186/69A GB4318669A GB1276344A GB 1276344 A GB1276344 A GB 1276344A GB 43186/69 A GB43186/69 A GB 43186/69A GB 4318669 A GB4318669 A GB 4318669A GB 1276344 A GB1276344 A GB 1276344A
Authority
GB
United Kingdom
Prior art keywords
loud
speaker
low
negative feedback
frequencies
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.)
Expired
Application number
GB43186/69A
Other languages
English (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.)
SERVO SOUND SA
Original Assignee
SERVO SOUND SA
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 SERVO SOUND SA filed Critical SERVO SOUND SA
Publication of GB1276344A publication Critical patent/GB1276344A/en
Expired 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
  • Circuit For Audible Band Transducer (AREA)
GB43186/69A 1968-08-29 1969-08-29 Dynamic feedback amplifier Expired GB1276344A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE720115 1968-08-29

Publications (1)

Publication Number Publication Date
GB1276344A true GB1276344A (en) 1972-06-01

Family

ID=3853448

Family Applications (1)

Application Number Title Priority Date Filing Date
GB43186/69A Expired GB1276344A (en) 1968-08-29 1969-08-29 Dynamic feedback amplifier

Country Status (4)

Country Link
US (1) US3647969A (forum.php)
BE (1) BE720115A (forum.php)
FR (1) FR2016588A1 (forum.php)
GB (1) GB1276344A (forum.php)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4638258A (en) * 1982-02-26 1987-01-20 Barcus-Berry Electronics, Inc. Reference load amplifier correction system
NL8401041A (nl) * 1984-04-03 1985-11-01 Philips Nv Elektro-akoestische inrichting.
US5031221A (en) * 1987-06-02 1991-07-09 Yamaha Corporation Dynamic loudspeaker driving apparatus
US5009281A (en) * 1988-03-10 1991-04-23 Yamaha Corporation Acoustic apparatus
EP0340435A3 (en) * 1988-04-01 1991-04-24 Yamaha Corporation Acoustic apparatus
JPH0728473B2 (ja) * 1988-05-06 1995-03-29 ヤマハ株式会社 インピーダンス補償回路
US4985925A (en) * 1988-06-24 1991-01-15 Sensor Electronics, Inc. Active noise reduction system
GB2234880A (en) * 1989-07-31 1991-02-13 David Robin Birt Controlling the Q factor of loudspeakers
US5604813A (en) * 1994-05-02 1997-02-18 Noise Cancellation Technologies, Inc. Industrial headset
US6683965B1 (en) 1995-10-20 2004-01-27 Bose Corporation In-the-ear noise reduction headphones
US6396930B1 (en) 1998-02-20 2002-05-28 Michael Allen Vaudrey Active noise reduction for audiometry
FR2778741B1 (fr) * 1998-05-12 2001-04-27 Ct Scient Tech Batiment Cstb Dispositif de controle actif d'impedance acoustique
CA2408045A1 (en) * 2001-10-16 2003-04-16 Audio Products International Corp. Loudspeaker with large displacement motional feedback
DE102007002920B4 (de) 2007-01-19 2012-09-20 Wolfgang Halang Verfahren zur Bestimmung der Membranengeschwindigkeit eines dynamischen Lautsprechers
GB201712391D0 (en) 2017-08-01 2017-09-13 Turner Michael James Controller for an electromechanical transducer
JP7015681B2 (ja) * 2017-11-30 2022-02-03 Koa株式会社 ヒータ温度制御回路、及び、それを用いたセンサ装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2887532A (en) * 1956-10-31 1959-05-19 Rca Corp Audio frequency amplifier
US3047661A (en) * 1957-01-18 1962-07-31 Daniel E Winker High fidelity audio system
US3530244A (en) * 1967-02-13 1970-09-22 Martin G Reiffin Motional feedback amplifier systems
US3525812A (en) * 1969-05-08 1970-08-25 James E Verdier Transducer circuit and method of operation

Also Published As

Publication number Publication date
BE720115A (forum.php) 1969-02-03
US3647969A (en) 1972-03-07
FR2016588A1 (forum.php) 1970-05-08

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee