DE69725362D1 - Elektronische Lautstärkesteuerungsschaltung mit gesteuerter Ausgangscharakteristik - Google Patents

Elektronische Lautstärkesteuerungsschaltung mit gesteuerter Ausgangscharakteristik

Info

Publication number
DE69725362D1
DE69725362D1 DE69725362T DE69725362T DE69725362D1 DE 69725362 D1 DE69725362 D1 DE 69725362D1 DE 69725362 T DE69725362 T DE 69725362T DE 69725362 T DE69725362 T DE 69725362T DE 69725362 D1 DE69725362 D1 DE 69725362D1
Authority
DE
Germany
Prior art keywords
volume control
transistor
current
resistor
control signal
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
DE69725362T
Other languages
English (en)
Other versions
DE69725362T2 (de
Inventor
Katsumi Imai
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.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric Co 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
Priority claimed from JP04368896A external-priority patent/JP3253512B2/ja
Priority claimed from JP06838596A external-priority patent/JP3249382B2/ja
Application filed by Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Application granted granted Critical
Publication of DE69725362D1 publication Critical patent/DE69725362D1/de
Publication of DE69725362T2 publication Critical patent/DE69725362T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G7/00—Volume compression or expansion in amplifiers
    • H03G7/06—Volume compression or expansion in amplifiers having semiconductor devices
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G1/00—Details of arrangements for controlling amplification
    • H03G1/0005—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal
    • H03G1/0017—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal the device being at least one of the amplifying solid state elements of the amplifier
    • H03G1/0023—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal the device being at least one of the amplifying solid state elements of the amplifier in emitter-coupled or cascode amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/45—Differential amplifiers
    • H03F3/45071—Differential amplifiers with semiconductor devices only
    • H03F3/45076—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier
    • H03F3/4508—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier using bipolar transistors as the active amplifying circuit
    • H03F3/45085—Long tailed pairs

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
DE69725362T 1996-02-29 1997-02-27 Elektronische Lautstärkesteuerungsschaltung mit gesteuerter Ausgangscharakteristik Expired - Fee Related DE69725362T2 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP04368896A JP3253512B2 (ja) 1996-02-29 1996-02-29 電子ボリューム回路
JP4368896 1996-02-29
JP06838596A JP3249382B2 (ja) 1996-03-25 1996-03-25 電子ボリューム回路
JP6838596 1996-03-25

Publications (2)

Publication Number Publication Date
DE69725362D1 true DE69725362D1 (de) 2003-11-13
DE69725362T2 DE69725362T2 (de) 2004-06-24

Family

ID=26383495

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69725362T Expired - Fee Related DE69725362T2 (de) 1996-02-29 1997-02-27 Elektronische Lautstärkesteuerungsschaltung mit gesteuerter Ausgangscharakteristik

Country Status (5)

Country Link
US (1) US6317502B1 (de)
EP (1) EP0793339B1 (de)
KR (1) KR100235414B1 (de)
AT (1) ATE251817T1 (de)
DE (1) DE69725362T2 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3889546B2 (ja) * 2000-03-30 2007-03-07 三洋電機株式会社 レベル調整回路
TWI352310B (en) * 2004-02-17 2011-11-11 Hon Hai Prec Ind Co Ltd System and method for controlling volume with a si
CN104682908A (zh) * 2015-01-30 2015-06-03 小米科技有限责任公司 控制音量的方法及装置

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3870964A (en) * 1973-07-16 1975-03-11 Nat Semiconductor Corp Sound volume control circuit with sound level output linearly related to volume control potentiometer setting
JPS55109009A (en) * 1979-02-14 1980-08-21 Sony Corp Level control circuit
NL7908411A (nl) 1979-11-19 1981-06-16 Philips Nv Electronische differentiaal regelaar.
JPS59172819A (ja) 1983-03-19 1984-09-29 Rohm Co Ltd 利得可変増幅器
US4888810A (en) * 1987-08-05 1989-12-19 Argosy Electronics Analog volume control circuit
JPH0239711A (ja) * 1988-07-29 1990-02-08 Nec Kansai Ltd 電子ボリウム回路
US5128566A (en) 1989-11-03 1992-07-07 Etymotic Research, Inc. Variable attenuator circuit
JPH071852B2 (ja) * 1990-03-06 1995-01-11 ローム株式会社 電子ボリューム回路
US5369711A (en) * 1990-08-31 1994-11-29 Bellsouth Corporation Automatic gain control for a headset
JPH04319805A (ja) 1991-04-19 1992-11-10 Hitachi Ltd 利得可変増幅器
JPH07202599A (ja) * 1993-12-28 1995-08-04 Toshiba Corp 音量コントロール回路
JPH07212138A (ja) * 1994-01-24 1995-08-11 Fujitsu Ltd 電子ボリューム
US5424682A (en) * 1994-08-01 1995-06-13 Motorola, Inc. Variable gain amplifier circuit
JPH08237054A (ja) * 1995-03-01 1996-09-13 Nec Corp 利得可変回路
US5812029A (en) * 1996-10-04 1998-09-22 Harris Corporation Gain control circuit and method

Also Published As

Publication number Publication date
EP0793339A2 (de) 1997-09-03
EP0793339B1 (de) 2003-10-08
EP0793339A3 (de) 1999-01-07
ATE251817T1 (de) 2003-10-15
KR100235414B1 (ko) 1999-12-15
DE69725362T2 (de) 2004-06-24
KR970068140A (ko) 1997-10-13
US6317502B1 (en) 2001-11-13

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee