JPH0582084B2 - - Google Patents

Info

Publication number
JPH0582084B2
JPH0582084B2 JP88501068A JP50106888A JPH0582084B2 JP H0582084 B2 JPH0582084 B2 JP H0582084B2 JP 88501068 A JP88501068 A JP 88501068A JP 50106888 A JP50106888 A JP 50106888A JP H0582084 B2 JPH0582084 B2 JP H0582084B2
Authority
JP
Japan
Prior art keywords
filter
volume
microcomputer
amplifier
attenuator
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
JP88501068A
Other languages
English (en)
Japanese (ja)
Other versions
JPH02500077A (ja
Inventor
Jaromiiru Aaru Baresu
Bakuretsushu Bii Peteru
Jeimuzu Eichi Sutanjeru
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.)
Motorola Solutions Inc
Original Assignee
Motorola 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 Motorola Inc filed Critical Motorola Inc
Publication of JPH02500077A publication Critical patent/JPH02500077A/ja
Publication of JPH0582084B2 publication Critical patent/JPH0582084B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G7/00—Volume compression or expansion in amplifiers
    • H03G7/001—Volume compression or expansion in amplifiers without controlling loop
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/02—Manually-operated control
    • H03G3/14—Manually-operated control in frequency-selective amplifiers
    • H03G3/18—Manually-operated control in frequency-selective amplifiers having semiconductor devices

Landscapes

  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
  • Circuits Of Receivers In General (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Amplifiers (AREA)
  • Television Receiver Circuits (AREA)
JP88501068A 1987-01-07 1987-11-27 無線受信機用音声増幅器回路 Granted JPH02500077A (ja)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US07/000,923 US4721923A (en) 1987-01-07 1987-01-07 Radio receiver speech amplifier circuit
US923 1987-01-07
PCT/US1987/003165 WO1988005226A1 (en) 1987-01-07 1987-11-27 Radio receiver speech amplifier circuit

Publications (2)

Publication Number Publication Date
JPH02500077A JPH02500077A (ja) 1990-01-11
JPH0582084B2 true JPH0582084B2 (US20100056889A1-20100304-C00004.png) 1993-11-17

Family

ID=21693581

Family Applications (1)

Application Number Title Priority Date Filing Date
JP88501068A Granted JPH02500077A (ja) 1987-01-07 1987-11-27 無線受信機用音声増幅器回路

Country Status (7)

Country Link
US (1) US4721923A (US20100056889A1-20100304-C00004.png)
EP (1) EP0348396B1 (US20100056889A1-20100304-C00004.png)
JP (1) JPH02500077A (US20100056889A1-20100304-C00004.png)
KR (1) KR960005377B1 (US20100056889A1-20100304-C00004.png)
AT (1) ATE96951T1 (US20100056889A1-20100304-C00004.png)
DE (1) DE3788070T2 (US20100056889A1-20100304-C00004.png)
WO (1) WO1988005226A1 (US20100056889A1-20100304-C00004.png)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008312260A (ja) * 2008-09-16 2008-12-25 Panasonic Corp 音量調整装置

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5010306A (en) * 1990-02-20 1991-04-23 At&T Bell Laboratories Low cost digital amplitude regulator
US5028893A (en) * 1990-03-21 1991-07-02 Delco Electronics Corporation Switched capacitor filters with continuous time control
US5394476A (en) * 1992-12-17 1995-02-28 Motorola, Inc. Volume control device
US5467393A (en) * 1993-11-24 1995-11-14 Ericsson Inc. Method and apparatus for volume and intelligibility control for a loudspeaker
FI99062C (fi) * 1995-10-05 1997-09-25 Nokia Mobile Phones Ltd Puhesignaalin taajuuskorjaus matkapuhelimessa
US5966438A (en) * 1996-03-05 1999-10-12 Ericsson Inc. Method and apparatus for adaptive volume control for a radiotelephone
US5734975A (en) * 1996-10-24 1998-03-31 Motorola, Inc. Direct-coupled signaling receiver with PL/DPL detector
US6353671B1 (en) * 1998-02-05 2002-03-05 Bioinstco Corp. Signal processing circuit and method for increasing speech intelligibility
EP1052832A1 (en) * 1999-05-14 2000-11-15 STMicroelectronics S.r.l. Receiving section of a telephone
US6766142B2 (en) * 2001-01-23 2004-07-20 Qualcomm Incorporated System and method for adaptive equalization in a wireless communication system
WO2004004409A1 (en) * 2002-07-01 2004-01-08 Nokia Corporation Mobile communication terminal
EP1601171B1 (en) * 2004-05-28 2008-04-30 Research In Motion Limited System And Method For Adjusting An Audio Signal
US7574010B2 (en) * 2004-05-28 2009-08-11 Research In Motion Limited System and method for adjusting an audio signal
DE102008040291A1 (de) * 2008-07-09 2010-01-14 Robert Bosch Gmbh Audioverstärker sowie Verfahren zur Umkonfiguration eines Audioverstärkers
WO2010031109A1 (en) * 2008-09-19 2010-03-25 Newsouth Innovations Pty Limited Method of analysing an audio signal
DE102008042377A1 (de) * 2008-09-25 2010-04-01 Robert Bosch Gmbh Audioverstärker mit Lastanpassung sowie Verfahren zur Lastanpassung des Audioverstärkers
JP5482232B2 (ja) * 2010-01-26 2014-05-07 ヤマハ株式会社 信号処理回路
US9463816B2 (en) 2013-08-23 2016-10-11 Electro-Motive Diesel, Inc. Trainline communication network access point including filter
US9270335B2 (en) 2013-08-23 2016-02-23 Electro-Motive Diesel, Inc. Receive attenuation system for trainline communication networks
US9260123B2 (en) 2013-08-23 2016-02-16 Electro-Motive Diesel, Inc. System and method for determining locomotive position in a consist
US9688295B2 (en) 2013-08-23 2017-06-27 Electro-Motive Diesel, Inc. Trainline network access point for parallel communication
US9560139B2 (en) 2014-04-11 2017-01-31 Electro-Motive Diesel, Inc. Train communication network
US9744979B2 (en) 2014-04-11 2017-08-29 Electro-Motive Diesel, Inc. Train communication network

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2400804A1 (de) * 1974-01-09 1975-07-17 Agfa Gevaert Ag Schaltungsanordnung zur selbsttaetigen begrenzung eines lautsprecher-stromes
JPS5337351A (en) * 1976-09-20 1978-04-06 Hitachi Ltd Adjuster such as sound volume and sound tone for audio equipment
JPS5340256A (en) * 1976-09-27 1978-04-12 Alps Electric Co Ltd Automatic gain controller
JPS6033011B2 (ja) * 1978-05-28 1985-07-31 日本ビクター株式会社 自動音量減衰装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008312260A (ja) * 2008-09-16 2008-12-25 Panasonic Corp 音量調整装置

Also Published As

Publication number Publication date
KR890700966A (ko) 1989-04-28
EP0348396A4 (en) 1991-05-15
KR960005377B1 (ko) 1996-04-24
DE3788070D1 (de) 1993-12-09
WO1988005226A1 (en) 1988-07-14
JPH02500077A (ja) 1990-01-11
US4721923A (en) 1988-01-26
EP0348396A1 (en) 1990-01-03
ATE96951T1 (de) 1993-11-15
EP0348396B1 (en) 1993-11-03
DE3788070T2 (de) 1994-03-03

Similar Documents

Publication Publication Date Title
JPH0582084B2 (US20100056889A1-20100304-C00004.png)
JP2730868B2 (ja) オーディオシステムおよび明瞭度増加方法
US4320534A (en) Loudness control circuit
JPH06509218A (ja) 適応型グラフィック等化器およびこれを利用する無線装置
EP0944166B1 (en) Automatic dynamic range controlling circuit
JP3334101B2 (ja) 拡声器
JPS5550746A (en) Noise reduction unit for automobile audio equipment
WO1995006976A1 (en) Variable gain amplifier
JP4542482B2 (ja) 残留ノイズ軽減回路
JP3606917B2 (ja) コンパンダ回路及びこれを用いた通信装置
GB2327022A (en) Speech operated noise attenuation device (SONAD)
JP2004023547A (ja) 低周波減衰回路およびラジオ受信機
JP3545092B2 (ja) コンパンダ回路及び無線電話装置
JPH0513068Y2 (US20100056889A1-20100304-C00004.png)
JPS61278217A (ja) Ｆｍステレオ受信機
JP2000151315A (ja) 無線通信機の自動音量設定方式
JPH0611632Y2 (ja) 自動ラウドネス制御回路
JPH0951283A (ja) 受信機
JPS5831621A (ja) スケルチ回路
JP3371755B2 (ja) 音声歪み率補正装置
JP3288475B2 (ja) ラジオ受信装置
JPH03131117A (ja) 音響再生装置
JPH10284964A (ja) 音量調節装置
JP2000022568A (ja) 受信装置
JP3820294B2 (ja) 音響装置