FR2369739A1 - Circuit amplificateur a gain variable commandable en tension - Google Patents

Circuit amplificateur a gain variable commandable en tension

Info

Publication number
FR2369739A1
FR2369739A1 FR7632549A FR7632549A FR2369739A1 FR 2369739 A1 FR2369739 A1 FR 2369739A1 FR 7632549 A FR7632549 A FR 7632549A FR 7632549 A FR7632549 A FR 7632549A FR 2369739 A1 FR2369739 A1 FR 2369739A1
Authority
FR
France
Prior art keywords
amplifier
operational amplifiers
independence
gain amplifier
voltage controlled
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
FR7632549A
Other languages
English (en)
Other versions
FR2369739B1 (fr
Inventor
Francois Augier De Cremiers
Jean Macle
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.)
Alcatel CIT SA
Original Assignee
Alcatel CIT SA
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 Alcatel CIT SA filed Critical Alcatel CIT SA
Priority to FR7632549A priority Critical patent/FR2369739A1/fr
Publication of FR2369739A1 publication Critical patent/FR2369739A1/fr
Application granted granted Critical
Publication of FR2369739B1 publication Critical patent/FR2369739B1/fr
Granted legal-status Critical Current

Links

Classifications

    • 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
    • H03G1/0035—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements
    • H03G1/007—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements using FET type devices

Landscapes

  • Control Of Amplification And Gain Control (AREA)

Abstract

L'invention est du domaine des circuits électroniques. Elle concerne un amplificateur à gain variable commandable en tension Ce circuit amplificateur emploie un transistor à effet de champ comme élément variable dans un réseau de résistances qui détermine le gain de l'amplificateur. On obtient une caracteristique gain-tension de commande indépendante des dispersions observées sur les transistors à effet de champ en effectuant un premier réglage d'une résistance dudit réseau lorsqu'on applique une tension de commande nulle, puis un deuxième reglage de la tension de commande effectivement appliquée au transistor à effet de champ lorsqu'on applique une tension de commande non-nulle. L'invention s'applique en particulier à un régulateur de groupes téléphoniques dans lequel on utilise plusieurs circuits amplificateurs ayant un organe commun de commande de gain.
FR7632549A 1976-10-28 1976-10-28 Circuit amplificateur a gain variable commandable en tension Granted FR2369739A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7632549A FR2369739A1 (fr) 1976-10-28 1976-10-28 Circuit amplificateur a gain variable commandable en tension

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7632549A FR2369739A1 (fr) 1976-10-28 1976-10-28 Circuit amplificateur a gain variable commandable en tension

Publications (2)

Publication Number Publication Date
FR2369739A1 true FR2369739A1 (fr) 1978-05-26
FR2369739B1 FR2369739B1 (fr) 1980-02-08

Family

ID=9179321

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7632549A Granted FR2369739A1 (fr) 1976-10-28 1976-10-28 Circuit amplificateur a gain variable commandable en tension

Country Status (1)

Country Link
FR (1) FR2369739A1 (fr)

Also Published As

Publication number Publication date
FR2369739B1 (fr) 1980-02-08

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Legal Events

Date Code Title Description
ST Notification of lapse