FR2420876A1 - Circuit d'amplification dont il est possible de regler le coefficient d'amplification - Google Patents

Circuit d'amplification dont il est possible de regler le coefficient d'amplification

Info

Publication number
FR2420876A1
FR2420876A1 FR7906863A FR7906863A FR2420876A1 FR 2420876 A1 FR2420876 A1 FR 2420876A1 FR 7906863 A FR7906863 A FR 7906863A FR 7906863 A FR7906863 A FR 7906863A FR 2420876 A1 FR2420876 A1 FR 2420876A1
Authority
FR
France
Prior art keywords
transistors
interconnected
amplification
amplification circuit
converters
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
FR7906863A
Other languages
English (en)
Other versions
FR2420876B1 (fr
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 FR2420876A1 publication Critical patent/FR2420876A1/fr
Application granted granted Critical
Publication of FR2420876B1 publication Critical patent/FR2420876B1/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
    • H03G1/0017—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
    • 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
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers

Landscapes

  • Amplifiers (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Amplitude Modulation (AREA)

Abstract

Ce circuit comporte des premier et deuxième transistors à émetteurs interconnectés, ainsi que des troisième et quatrième transistors à émetteur interconnectés. Les collecteurs des premier et troisième transistors conduisent vers une sortie du circuit d'amplification. Entre les bases interconnectées des premier et quatrième respectivement des deuxième et troisième transistors, il est possible d'appliquer un signal de réglage. A l'aide de premier et deuxième convertisseurs tension-courant, les émetteurs interconnectés des premier et deuxième transistors et les émetteurs interconnectés des troisième et quatrième transistors reçoivent du courant de signal, au moins un des deux convertisseurs ayant une entrée de signal, alors que les deux convertisseurs sont rétrocouplés vers la sortie du circuit d'amplification. Applications à la fabrication de multiplicateurs, modulateurs et démodulateurs.
FR7906863A 1978-03-20 1979-03-19 Circuit d'amplification dont il est possible de regler le coefficient d'amplification Granted FR2420876A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7802973A NL7802973A (nl) 1978-03-20 1978-03-20 Versterkerschakeling met regelbare versterkings- factor.

Publications (2)

Publication Number Publication Date
FR2420876A1 true FR2420876A1 (fr) 1979-10-19
FR2420876B1 FR2420876B1 (fr) 1984-07-13

Family

ID=19830527

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7906863A Granted FR2420876A1 (fr) 1978-03-20 1979-03-19 Circuit d'amplification dont il est possible de regler le coefficient d'amplification

Country Status (15)

Country Link
US (1) US4290025A (fr)
JP (1) JPS54130856A (fr)
AT (1) AT376077B (fr)
AU (1) AU526139B2 (fr)
BE (1) BE874957A (fr)
CA (1) CA1139850A (fr)
CH (1) CH646555A5 (fr)
DE (1) DE2910093A1 (fr)
ES (1) ES478764A1 (fr)
FR (1) FR2420876A1 (fr)
GB (1) GB2016838B (fr)
HK (1) HK19383A (fr)
IT (1) IT1111944B (fr)
NL (1) NL7802973A (fr)
SE (1) SE430842B (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4331929A (en) 1979-04-04 1982-05-25 Nippon Gakki Seizo Kabushiki Kaisha Gain-controlled amplifier
JPS5718109A (en) * 1980-07-08 1982-01-29 Toshiba Corp Sound volume controlling circuit
JPS57125509A (en) * 1981-01-28 1982-08-04 Toshiba Corp Signal level control circuit
JPS5857807A (ja) * 1981-10-02 1983-04-06 Sony Corp 電圧制御可変利得回路
DE3204217A1 (de) * 1982-02-08 1983-08-18 Philips Patentverwaltung Gmbh, 2000 Hamburg Schaltung zur elektronischen verstaerkungsstellung
US4695806A (en) * 1986-04-15 1987-09-22 Tektronix, Inc. Precision remotely-switched attenuator
JPH0720040B2 (ja) * 1986-11-21 1995-03-06 ソニー株式会社 電圧−電流変換回路
US4937516A (en) * 1987-11-13 1990-06-26 U.S. Philips Corporation Balanced voltage-current converter and double-balanced mixer circuit comprising such a converter
EP0627813B1 (fr) * 1993-06-04 1999-08-25 Koninklijke Philips Electronics N.V. Amplificateur intégré à gain d'amplification avec précision
DE102007025604A1 (de) 2007-05-31 2008-12-04 Evonik Rohmax Additives Gmbh Verbesserte Polymerdispersionen
DE102010041242A1 (de) 2010-09-23 2012-03-29 Evonik Rohmax Additives Gmbh Verfahren zur Herstellung von Polymerdispersionen

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1320910A (en) * 1969-09-16 1973-06-20 Plessey Co Ltd Amplifiers
US3750042A (en) * 1972-08-21 1973-07-31 Gen Electric Amplifier of controllable gain
US3891937A (en) * 1972-12-21 1975-06-24 Philips Corp Circuit arrangement for electronic gain/control, in particular electronic volume control circuit
DE2404331A1 (de) * 1974-01-30 1975-07-31 Philips Patentverwaltung Schaltungsanordnung zur elektronischen verstaerkungseinstellung
US3921091A (en) * 1971-05-14 1975-11-18 Philips Corp Amplifier circuit
DE2526310A1 (de) * 1975-06-12 1976-12-23 Philips Patentverwaltung Schaltung zur elektronischen verstaerkungseinstellung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3684974A (en) * 1968-01-29 1972-08-15 Motorola Inc Automatic gain control rf-if amplifier
US3875522A (en) * 1973-04-13 1975-04-01 Signetics Corp Integrated direct-coupled electronic attenuator
JPS5528564B2 (fr) * 1974-06-22 1980-07-29

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1320910A (en) * 1969-09-16 1973-06-20 Plessey Co Ltd Amplifiers
US3921091A (en) * 1971-05-14 1975-11-18 Philips Corp Amplifier circuit
US3750042A (en) * 1972-08-21 1973-07-31 Gen Electric Amplifier of controllable gain
US3891937A (en) * 1972-12-21 1975-06-24 Philips Corp Circuit arrangement for electronic gain/control, in particular electronic volume control circuit
DE2404331A1 (de) * 1974-01-30 1975-07-31 Philips Patentverwaltung Schaltungsanordnung zur elektronischen verstaerkungseinstellung
DE2526310A1 (de) * 1975-06-12 1976-12-23 Philips Patentverwaltung Schaltung zur elektronischen verstaerkungseinstellung

Also Published As

Publication number Publication date
ES478764A1 (es) 1979-11-01
FR2420876B1 (fr) 1984-07-13
ATA208979A (de) 1984-02-15
CH646555A5 (de) 1984-11-30
SE7902365L (sv) 1979-09-21
IT7921087A0 (it) 1979-03-16
CA1139850A (fr) 1983-01-18
US4290025A (en) 1981-09-15
AT376077B (de) 1984-10-10
IT1111944B (it) 1986-01-13
NL7802973A (nl) 1979-09-24
JPS54130856A (en) 1979-10-11
AU526139B2 (en) 1982-12-16
AU4519979A (en) 1979-09-27
HK19383A (en) 1983-06-17
BE874957A (fr) 1979-09-19
GB2016838A (en) 1979-09-26
SE430842B (sv) 1983-12-12
DE2910093A1 (de) 1979-10-04
GB2016838B (en) 1982-04-21

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Legal Events

Date Code Title Description
ST Notification of lapse