ES8200801A1 - Una disposicion de circuito amplificador diferencial de ga- nancia variable - Google Patents

Una disposicion de circuito amplificador diferencial de ga- nancia variable

Info

Publication number
ES8200801A1
ES8200801A1 ES497946A ES497946A ES8200801A1 ES 8200801 A1 ES8200801 A1 ES 8200801A1 ES 497946 A ES497946 A ES 497946A ES 497946 A ES497946 A ES 497946A ES 8200801 A1 ES8200801 A1 ES 8200801A1
Authority
ES
Spain
Prior art keywords
transistors
pairs
pair
load resistors
variable
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
Application number
ES497946A
Other languages
English (en)
Other versions
ES497946A0 (es
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 ES497946A0 publication Critical patent/ES497946A0/es
Publication of ES8200801A1 publication Critical patent/ES8200801A1/es
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G1/00—Details of arrangements for controlling amplification
    • H03G1/04—Modifications of control circuit to reduce distortion caused by control
    • 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

Abstract

CIRCUITO AMPLIFICADOR DIFERENCIAL DE GANANCIA VARIABLE. COMPRENDE DOS AMPLIFICADORES DIFERENCIALES, CONSTITUIDO CADA UNO POR UN PAR DE TRANSISTORES NPN (1, 2, Y 4, 6), CONECTADOS A UN CIRCUITO DE MANANTIAL DE CORRIENTE CONTROLABLE, QUE COMPRENDE UNA FUENTE (9) DE CORRIENTE CONTINUA CONSTANTE, Y DOS TRANSISTORES (7 Y 8). LA SEÑAL DE CONTROL DE GANANCIA (UE) CONTROLA LOS AMPLIFICADORES DIFERENCIALES (1, 2, Y 5, 6), Y DETERMINA LA TRANSMISION DE LA CORRIENTE SUMINISTRADA POR LOS TRANSISTORES (7 Y 8) A UNAS DEPENDENCIAS DE CARGA (17 Y 18). UNA SEÑAL DE ENTRADA DE CORRIENTE ALTERNA (US) ES TRANSMITIDA POR UNOS TERMINALES (14 Y 13) A LOS TRANSISTORES (7 Y 8). UN DIVISOR DE CORRIENTE (23 Y 24) MANTIENE LAS TENSIONES EN LAS IMPEDANCIAS DE CARGA (17 Y 18) INDEPENDIENTES DE LA SEÑAL DE CONTROL DE GANANCIA (UE).
ES497946A 1979-12-21 1980-12-19 Una disposicion de circuito amplificador diferencial de ga- nancia variable Expired ES8200801A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2951637A DE2951637C2 (de) 1979-12-21 1979-12-21 Einstellbarer Transistor-Differenzverstärker

Publications (2)

Publication Number Publication Date
ES497946A0 ES497946A0 (es) 1981-11-01
ES8200801A1 true ES8200801A1 (es) 1981-11-01

Family

ID=6089214

Family Applications (1)

Application Number Title Priority Date Filing Date
ES497946A Expired ES8200801A1 (es) 1979-12-21 1980-12-19 Una disposicion de circuito amplificador diferencial de ga- nancia variable

Country Status (11)

Country Link
US (1) US4360786A (es)
JP (1) JPS5698918A (es)
AU (1) AU537711B2 (es)
CA (1) CA1149028A (es)
DE (1) DE2951637C2 (es)
ES (1) ES8200801A1 (es)
FR (1) FR2472303A1 (es)
GB (1) GB2066600B (es)
HK (1) HK47784A (es)
IT (1) IT1134789B (es)
SG (1) SG71783G (es)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE49687T1 (de) * 1984-06-07 1990-02-15 Siemens Ag Differenzverstaerkerschaltung.
DE3522416A1 (de) * 1985-06-22 1987-01-02 Standard Elektrik Lorenz Ag Regelbare breitbandverstaerkerschaltung
US4695806A (en) * 1986-04-15 1987-09-22 Tektronix, Inc. Precision remotely-switched attenuator
US5157350A (en) * 1991-10-31 1992-10-20 Harvey Rubens Analog multipliers
FR2689705B1 (fr) * 1992-04-01 1994-06-10 Sgs Thomson Microelectronics Circuit amplificateur video a commande de gain et d'alignement.
US5717360A (en) * 1996-04-16 1998-02-10 National Semiconductor Corporation High speed variable gain amplifier
US5703524A (en) * 1996-04-16 1997-12-30 Exar Corporation Piece-wise linear approximation of a dB linear programmable gain amplifier
US6566949B1 (en) * 2000-08-31 2003-05-20 International Business Machines Corporation Highly linear high-speed transconductance amplifier for Gm-C filters

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS504425A (es) * 1972-10-12 1975-01-17
DE2723750A1 (de) * 1977-05-26 1978-12-07 Philips Patentverwaltung Einstellbarer transistor-verstaerker

Also Published As

Publication number Publication date
CA1149028A (en) 1983-06-28
FR2472303A1 (fr) 1981-06-26
AU6556280A (en) 1981-06-25
JPS5698918A (en) 1981-08-08
JPS6361803B2 (es) 1988-11-30
ES497946A0 (es) 1981-11-01
IT8026758A0 (it) 1980-12-18
IT1134789B (it) 1986-08-13
AU537711B2 (en) 1984-07-05
DE2951637A1 (de) 1981-07-02
FR2472303B1 (es) 1984-02-24
US4360786A (en) 1982-11-23
DE2951637C2 (de) 1981-10-01
GB2066600B (en) 1983-09-21
SG71783G (en) 1984-08-03
HK47784A (en) 1984-06-15
GB2066600A (en) 1981-07-08

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