DE3774895D1 - Verstaerker mit automatischer verstaerkungskontrolle. - Google Patents

Verstaerker mit automatischer verstaerkungskontrolle.

Info

Publication number
DE3774895D1
DE3774895D1 DE8787200247T DE3774895T DE3774895D1 DE 3774895 D1 DE3774895 D1 DE 3774895D1 DE 8787200247 T DE8787200247 T DE 8787200247T DE 3774895 T DE3774895 T DE 3774895T DE 3774895 D1 DE3774895 D1 DE 3774895D1
Authority
DE
Germany
Prior art keywords
amplifier
gain control
automatic gain
automatic
control
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 - Lifetime
Application number
DE8787200247T
Other languages
English (en)
Inventor
Koning Stephanus Hendrik De
Alexander Verwijmeren
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Application granted granted Critical
Publication of DE3774895D1 publication Critical patent/DE3774895D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H04R3/02—Circuits for transducers, loudspeakers or microphones for preventing acoustic reaction, i.e. acoustic oscillatory feedback

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Control Of Amplification And Gain Control (AREA)
DE8787200247T 1986-02-18 1987-02-17 Verstaerker mit automatischer verstaerkungskontrolle. Expired - Lifetime DE3774895D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL8600405A NL8600405A (nl) 1986-02-18 1986-02-18 Versterker met automatische regeling van de versterking.

Publications (1)

Publication Number Publication Date
DE3774895D1 true DE3774895D1 (de) 1992-01-16

Family

ID=19847591

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8787200247T Expired - Lifetime DE3774895D1 (de) 1986-02-18 1987-02-17 Verstaerker mit automatischer verstaerkungskontrolle.

Country Status (5)

Country Link
US (1) US4817160A (de)
EP (1) EP0234651B1 (de)
JP (1) JPS62193406A (de)
DE (1) DE3774895D1 (de)
NL (1) NL8600405A (de)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0304257A3 (de) * 1987-08-19 1989-09-27 McGregor, Thomas Sprachverstärkungseinrichtung
US5245665A (en) * 1990-06-13 1993-09-14 Sabine Musical Manufacturing Company, Inc. Method and apparatus for adaptive audio resonant frequency filtering
CA2056110C (en) * 1991-03-27 1997-02-04 Arnold I. Klayman Public address intelligibility system
US5495408A (en) * 1992-06-10 1996-02-27 Rockwell International Corporation Method and apparatus for signal tracking using feedback control loop
JP3235925B2 (ja) * 1993-11-19 2001-12-04 松下電器産業株式会社 ハウリング抑制装置
JP2773656B2 (ja) * 1994-09-09 1998-07-09 ヤマハ株式会社 ハウリング防止装置
US5710806A (en) * 1994-09-22 1998-01-20 Ameri Phone, Inc. Telecommunications device for the hearing impaired with telephone, text communication and answering, and automated voice carryover
US6535609B1 (en) * 1997-06-03 2003-03-18 Lear Automotive Dearborn, Inc. Cabin communication system
US7613529B1 (en) * 2000-09-09 2009-11-03 Harman International Industries, Limited System for eliminating acoustic feedback
US6748060B2 (en) 2002-04-08 2004-06-08 Plantronics, Inc. Apparatus and method for providing voice telephone instructions
US7092532B2 (en) * 2003-03-31 2006-08-15 Unitron Hearing Ltd. Adaptive feedback canceller
KR100667154B1 (ko) * 2004-10-26 2007-01-12 한국전자통신연구원 주파수 락 검출기
US8798283B2 (en) 2012-11-02 2014-08-05 Bose Corporation Providing ambient naturalness in ANR headphones

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4091236A (en) * 1976-09-07 1978-05-23 The University Of Akron Automatically tunable notch filter and method for suppression of acoustical feedback
NL7612358A (nl) * 1976-11-08 1978-05-10 Philips Nv Versterkerinrichting voor akoestische signalen voorzien van middelen voor het onderdrukken van ongewenste stoorsignalen.
US4088834A (en) * 1977-01-03 1978-05-09 Thurmond George R Feedback elimination system employing notch filter
JPS53129568A (en) * 1977-04-19 1978-11-11 Sony Corp Stopping device for howling
US4079199A (en) * 1977-05-25 1978-03-14 Patronis Jr Eugene T Acoustic feedback detector and automatic gain control
JPS6035624B2 (ja) * 1982-08-06 1985-08-15 工業技術院長 多検体多項目自動化学分析装置
US4602337A (en) * 1983-02-24 1986-07-22 Cox James R Analog signal translating system with automatic frequency selective signal gain adjustment

Also Published As

Publication number Publication date
NL8600405A (nl) 1987-09-16
JPS62193406A (ja) 1987-08-25
EP0234651B1 (de) 1991-12-04
US4817160A (en) 1989-03-28
EP0234651A1 (de) 1987-09-02

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: PHILIPS ELECTRONICS N.V., EINDHOVEN, NL

8339 Ceased/non-payment of the annual fee