JPS51123042A - Audio amplifier device - Google Patents

Audio amplifier device

Info

Publication number
JPS51123042A
JPS51123042A JP3669776A JP3669776A JPS51123042A JP S51123042 A JPS51123042 A JP S51123042A JP 3669776 A JP3669776 A JP 3669776A JP 3669776 A JP3669776 A JP 3669776A JP S51123042 A JPS51123042 A JP S51123042A
Authority
JP
Japan
Prior art keywords
audio amplifier
amplifier device
audio
amplifier
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.)
Pending
Application number
JP3669776A
Other languages
Japanese (ja)
Inventor
Biremu Fuan Horuse Tooto Anne
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
Publication of JPS51123042A publication Critical patent/JPS51123042A/en
Pending legal-status Critical Current

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

Landscapes

  • Control Of Amplification And Gain Control (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
JP3669776A 1975-04-03 1976-04-01 Audio amplifier device Pending JPS51123042A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7503948A NL7503948A (en) 1975-04-03 1975-04-03 AUDIO AMPLIFIER WITH MOTOR SPEED DEPENDENT VOLUME CONTROL.

Publications (1)

Publication Number Publication Date
JPS51123042A true JPS51123042A (en) 1976-10-27

Family

ID=19823506

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3669776A Pending JPS51123042A (en) 1975-04-03 1976-04-01 Audio amplifier device

Country Status (5)

Country Link
JP (1) JPS51123042A (en)
DE (1) DE2612055A1 (en)
FR (1) FR2306568A1 (en)
GB (1) GB1522421A (en)
NL (1) NL7503948A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH032720U (en) * 1989-05-29 1991-01-11

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2438376A1 (en) * 1978-10-05 1980-04-30 Thomson Brandt Sound level control for motor vehicle radio - uses control signal generated by ignition coil contact breaker terminal to increase level with increasing speed
DE2945783C2 (en) * 1979-11-13 1986-07-31 Fricke, Jobst Peter, Prof. Dr., 5000 Köln Sound signal amplifier circuit
JP2654948B2 (en) * 1987-07-31 1997-09-17 スズキ株式会社 Outboard motor audio alarm output device
GB2256102A (en) * 1991-05-24 1992-11-25 Robin Middlemass Howie Automatic level controller for in-vehicle sound system
US5677960A (en) * 1995-05-11 1997-10-14 Victor Company Of Japan, Ltd. On-vehicle sound control apparatus

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2191823A5 (en) * 1972-06-28 1974-02-01 Vincent Alain

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH032720U (en) * 1989-05-29 1991-01-11

Also Published As

Publication number Publication date
NL7503948A (en) 1976-10-05
GB1522421A (en) 1978-08-23
DE2612055A1 (en) 1976-10-14
FR2306568A1 (en) 1976-10-29

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