GB2437570B - Automatic gain control for mobile microphone - Google Patents

Automatic gain control for mobile microphone

Info

Publication number
GB2437570B
GB2437570B GB0616950A GB0616950A GB2437570B GB 2437570 B GB2437570 B GB 2437570B GB 0616950 A GB0616950 A GB 0616950A GB 0616950 A GB0616950 A GB 0616950A GB 2437570 B GB2437570 B GB 2437570B
Authority
GB
United Kingdom
Prior art keywords
gain control
automatic gain
mobile microphone
microphone
mobile
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 - Fee Related
Application number
GB0616950A
Other versions
GB0616950D0 (en
GB2437570A (en
Inventor
Gary Qu Jin
Yonghong Huang
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.)
Microsemi Semiconductor ULC
Original Assignee
Zarlink Semoconductor Inc
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 Zarlink Semoconductor Inc filed Critical Zarlink Semoconductor Inc
Publication of GB0616950D0 publication Critical patent/GB0616950D0/en
Priority to US11/740,332 priority Critical patent/US8135148B2/en
Publication of GB2437570A publication Critical patent/GB2437570A/en
Application granted granted Critical
Publication of GB2437570B publication Critical patent/GB2437570B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/32—Automatic control in amplifiers having semiconductor devices the control being dependent upon ambient noise level or sound level
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
    • H04M9/082—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic using echo cancellers

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Function (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Control Of Amplification And Gain Control (AREA)
GB0616950A 2006-04-26 2006-08-29 Automatic gain control for mobile microphone Expired - Fee Related GB2437570B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US11/740,332 US8135148B2 (en) 2006-04-26 2007-04-26 Automatic gain control for mobile microphone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US74568806P 2006-04-26 2006-04-26

Publications (3)

Publication Number Publication Date
GB0616950D0 GB0616950D0 (en) 2006-10-04
GB2437570A GB2437570A (en) 2007-10-31
GB2437570B true GB2437570B (en) 2010-04-07

Family

ID=37102892

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0616950A Expired - Fee Related GB2437570B (en) 2006-04-26 2006-08-29 Automatic gain control for mobile microphone

Country Status (2)

Country Link
CN (1) CN101064498A (en)
GB (1) GB2437570B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012134804A (en) * 2010-12-22 2012-07-12 Lapis Semiconductor Co Ltd Circuit for automatic level adjustment of audio signal
CN102497211B (en) * 2011-12-27 2015-05-27 成都华森宝科技有限公司 Automatic gain control (AGC) method for maintaining fixed gain of system link
US9479270B2 (en) * 2013-03-13 2016-10-25 Analog Devices, Inc. Apparatus and methods for loss of signal detection
KR20140137265A (en) * 2013-05-22 2014-12-02 삼성전자주식회사 Communication Terminal, Home Network System, and Method for controlling electronic device in home network system thereof
CN106060264B (en) * 2016-06-27 2017-11-17 广东欧珀移动通信有限公司 A kind of adjusting method of volume, device and mobile terminal
CN113808605B (en) * 2021-09-29 2023-09-12 睿云联(厦门)网络通讯技术有限公司 Voice enhancement method, device and equipment based on building intercom system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0325252A2 (en) * 1988-01-19 1989-07-26 Nec Corporation Gain control circuit for amplifier having stepwise variable gain
WO2000039991A1 (en) * 1998-12-23 2000-07-06 Telefonaktiebolaget Lm Ericsson (Publ) Methods and apparatus for adaptive signal gain control in communications systems
US6147979A (en) * 1997-08-12 2000-11-14 Lucent Technologies, Inc. System and method for echo cancellation in a communication system
US20020113654A1 (en) * 2000-09-04 2002-08-22 Siegfried Hart Method and circuit for automatic gain control of a signal amplifier
US20060013383A1 (en) * 2004-07-16 2006-01-19 Barron David L Automatic gain control for an adaptive finite impulse response and method therefore

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0325252A2 (en) * 1988-01-19 1989-07-26 Nec Corporation Gain control circuit for amplifier having stepwise variable gain
US6147979A (en) * 1997-08-12 2000-11-14 Lucent Technologies, Inc. System and method for echo cancellation in a communication system
WO2000039991A1 (en) * 1998-12-23 2000-07-06 Telefonaktiebolaget Lm Ericsson (Publ) Methods and apparatus for adaptive signal gain control in communications systems
US20020113654A1 (en) * 2000-09-04 2002-08-22 Siegfried Hart Method and circuit for automatic gain control of a signal amplifier
US20060013383A1 (en) * 2004-07-16 2006-01-19 Barron David L Automatic gain control for an adaptive finite impulse response and method therefore

Also Published As

Publication number Publication date
GB0616950D0 (en) 2006-10-04
CN101064498A (en) 2007-10-31
GB2437570A (en) 2007-10-31

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20120829