FR2360101A1 - Circuit de commande automatique de gain pour camera sonore - Google Patents

Circuit de commande automatique de gain pour camera sonore

Info

Publication number
FR2360101A1
FR2360101A1 FR7723524A FR7723524A FR2360101A1 FR 2360101 A1 FR2360101 A1 FR 2360101A1 FR 7723524 A FR7723524 A FR 7723524A FR 7723524 A FR7723524 A FR 7723524A FR 2360101 A1 FR2360101 A1 FR 2360101A1
Authority
FR
France
Prior art keywords
gain control
automatic gain
control circuit
resistor
determining
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.)
Granted
Application number
FR7723524A
Other languages
English (en)
Other versions
FR2360101B1 (fr
Inventor
Yutaka Kohtani
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.)
Canon Inc
Original Assignee
Canon 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 Canon Inc filed Critical Canon Inc
Publication of FR2360101A1 publication Critical patent/FR2360101A1/fr
Application granted granted Critical
Publication of FR2360101B1 publication Critical patent/FR2360101B1/fr
Granted 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
    • H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers
    • H03G3/301—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers the gain being continuously variable
    • H03G3/3015—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers the gain being continuously variable using diodes or transistors
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B31/00—Associated working of cameras or projectors with sound-recording or sound-reproducing means
    • G03B31/02—Associated working of cameras or projectors with sound-recording or sound-reproducing means in which sound track is on a moving-picture film

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)

Abstract

La présente invention concerne un circuit de commande automatique de gain pour caméra sonore. Le circuit selon la présente invention comprend deux circuits de commande automatique de gain pour commander un transistor 3 assurant la commande du gain de l'amplificateur 4. Le premier circuit comprend une résistance 10 et un condensateur 12 déterminant un premier temps d'attaque, le même condensateur 12 et une résistance 13 déterminant un temps de rétablissement ; le second circuit de commande de gain comprend une résistance 14 et un condensateur 16 déterminant un deuxième temps d'attaque et un condensateur 16 et une résistance 17 déterminant un second temps de rétablissement. Les seconds temps d'attaque et de rétablissement sont supérieurs aux premiers. Application à l'enregistrement de conversations ou de musique en même temps qu'une prise de vues.
FR7723524A 1976-07-30 1977-07-29 Circuit de commande automatique de gain pour camera sonore Granted FR2360101A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9109776A JPS5317333A (en) 1976-07-30 1976-07-30 Automatic gain control circuit for simultaneous sound recording cine camera

Publications (2)

Publication Number Publication Date
FR2360101A1 true FR2360101A1 (fr) 1978-02-24
FR2360101B1 FR2360101B1 (fr) 1982-06-18

Family

ID=14017005

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7723524A Granted FR2360101A1 (fr) 1976-07-30 1977-07-29 Circuit de commande automatique de gain pour camera sonore

Country Status (4)

Country Link
US (1) US4134079A (fr)
JP (1) JPS5317333A (fr)
DE (1) DE2734402A1 (fr)
FR (1) FR2360101A1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4258397A (en) * 1978-05-28 1981-03-24 Victor Company Of Japan, Limited Automatic recording level controlling circuit
US4349787A (en) * 1979-02-09 1982-09-14 Novanex Automation N.V. Compressor
ZA805415B (en) * 1979-09-14 1981-08-26 Plessey Overseas Digitally controlled wide range automatic gain control
JPS56134811A (en) * 1980-03-24 1981-10-21 Sony Corp Gain control circuit
JPS5723768A (en) * 1980-07-17 1982-02-08 Fuji Electric Co Ltd Defrosting operation control of refrigerating plant
DE3027715C2 (de) * 1980-07-19 1986-10-23 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Schaltungsanordnung zur selbsttätigen Regelung oder Begrenzung der Dynamik von Signalen
JPS59104809A (ja) * 1982-12-08 1984-06-16 Yokogawa Hokushin Electric Corp 自動利得制御回路
US4691307A (en) * 1983-01-20 1987-09-01 Shell Oil Company AGC circuit for televiewer
JPH054334Y2 (fr) * 1985-07-16 1993-02-03
GB8921903D0 (en) * 1989-09-28 1990-04-25 Orbitel Mobile Communications An amplifier
US5710675A (en) * 1996-05-29 1998-01-20 Western Digital Corporation Analog-to-digital converter for configuration control
US5936470A (en) * 1997-12-10 1999-08-10 Delco Electronics Corporation Audio amplifier having linear gain control
JP4640948B2 (ja) * 2004-06-17 2011-03-02 ローム株式会社 Ａｌｃ付き増幅装置およびそれを用いた電子機器
JP4578169B2 (ja) * 2004-07-23 2010-11-10 三洋電機株式会社 自動レベル調整回路
US7688050B2 (en) * 2006-11-01 2010-03-30 Semiconductor Components Industries, Llc Switching power supply controller with unidirectional transient gain change

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52661B2 (fr) * 1972-01-11 1977-01-10
JPS499897A (fr) * 1972-05-26 1974-01-28

Also Published As

Publication number Publication date
US4134079A (en) 1979-01-09
JPS5317333A (en) 1978-02-17
DE2734402A1 (de) 1978-02-02
FR2360101B1 (fr) 1982-06-18

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