JP4025093B2 - 音響回路 - Google Patents

音響回路 Download PDF

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Publication number
JP4025093B2
JP4025093B2 JP2002047330A JP2002047330A JP4025093B2 JP 4025093 B2 JP4025093 B2 JP 4025093B2 JP 2002047330 A JP2002047330 A JP 2002047330A JP 2002047330 A JP2002047330 A JP 2002047330A JP 4025093 B2 JP4025093 B2 JP 4025093B2
Authority
JP
Japan
Prior art keywords
signal
noise
unit
amplifying
output
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
JP2002047330A
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English (en)
Japanese (ja)
Other versions
JP2003249864A (ja
JP2003249864A5 (https=
Inventor
治康 西山
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.)
Fujitsu Ltd
Fujitsu Peripherals Ltd
Original Assignee
Fujitsu Ltd
Fujitsu Peripherals Ltd
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 Fujitsu Ltd, Fujitsu Peripherals Ltd filed Critical Fujitsu Ltd
Priority to JP2002047330A priority Critical patent/JP4025093B2/ja
Priority to US10/193,424 priority patent/US7024004B2/en
Publication of JP2003249864A publication Critical patent/JP2003249864A/ja
Publication of JP2003249864A5 publication Critical patent/JP2003249864A5/ja
Application granted granted Critical
Publication of JP4025093B2 publication Critical patent/JP4025093B2/ja
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • H03G3/34—Muting amplifier when no signal is present
    • H03G3/345—Muting during a short period of time when noise pulses are detected, i.e. blanking

Landscapes

  • Circuit For Audible Band Transducer (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Noise Elimination (AREA)
JP2002047330A 2002-02-25 2002-02-25 音響回路 Expired - Fee Related JP4025093B2 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2002047330A JP4025093B2 (ja) 2002-02-25 2002-02-25 音響回路
US10/193,424 US7024004B2 (en) 2002-02-25 2002-07-11 Audio circuit having noise cancelling function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002047330A JP4025093B2 (ja) 2002-02-25 2002-02-25 音響回路

Publications (3)

Publication Number Publication Date
JP2003249864A JP2003249864A (ja) 2003-09-05
JP2003249864A5 JP2003249864A5 (https=) 2005-08-18
JP4025093B2 true JP4025093B2 (ja) 2007-12-19

Family

ID=27750687

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2002047330A Expired - Fee Related JP4025093B2 (ja) 2002-02-25 2002-02-25 音響回路

Country Status (2)

Country Link
US (1) US7024004B2 (https=)
JP (1) JP4025093B2 (https=)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4085380B2 (ja) * 2003-04-14 2008-05-14 ソニー株式会社 曲間検出装置、曲間検出方法及び曲間検出プログラム
JP4876378B2 (ja) * 2004-08-27 2012-02-15 日本電気株式会社 音声処理装置、音声処理方法及び音声処理プログラム
TWI259721B (en) * 2005-05-19 2006-08-01 Realtek Semiconductor Corp Noise treatment device and method
US20070230715A1 (en) * 2006-03-28 2007-10-04 Ingemi Corp. Audio limiting device for headphones
JP4741537B2 (ja) * 2007-03-27 2011-08-03 Ｋｄｄｉ株式会社 ノイズ除去回路
CN102110463A (zh) * 2009-12-29 2011-06-29 三星电子株式会社 半导体存储器接口设备及方法
US8633767B2 (en) * 2011-08-29 2014-01-21 Mediatek Inc. Amplifier circuit with noise suppression and related noise suppression method thereof
CN102325288B (zh) * 2011-09-02 2014-04-16 惠州Tcl移动通信有限公司 用于消除移动终端耳机音频电路噪声的消噪装置和方法
JP5417491B2 (ja) * 2012-06-27 2014-02-12 株式会社東芝 電子機器、方法およびプログラム
CN104035826A (zh) * 2013-03-07 2014-09-10 安凯(广州)微电子技术有限公司 一种消除软件噪声方法及装置
CN104049651B (zh) * 2013-03-11 2016-12-28 广州市旺骏机电设备安装有限公司 制冷系统
US9699542B2 (en) 2014-10-03 2017-07-04 Analog Devices Global Headset amplification circuit with error voltage suppression
CN106023998B (zh) * 2016-05-27 2019-12-13 北京视觉世界科技有限公司 摄像头音频输入装置、去噪方法和摄像头
CN106601225A (zh) * 2017-01-23 2017-04-26 声源科技（深圳）有限公司 一种主动降噪耳机降低底噪的方法和装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02279026A (ja) 1989-04-20 1990-11-15 Nec Corp 車載機器の音声信号処理回路
US5727072A (en) * 1995-02-24 1998-03-10 Nynex Science & Technology Use of noise segmentation for noise cancellation

Also Published As

Publication number Publication date
JP2003249864A (ja) 2003-09-05
US20030161488A1 (en) 2003-08-28
US7024004B2 (en) 2006-04-04

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