FR2394923A1 - Amplificateur a courant continu a caracteristiques en fonction de la temperature ameliorees - Google Patents

Amplificateur a courant continu a caracteristiques en fonction de la temperature ameliorees

Info

Publication number
FR2394923A1
FR2394923A1 FR7718481A FR7718481A FR2394923A1 FR 2394923 A1 FR2394923 A1 FR 2394923A1 FR 7718481 A FR7718481 A FR 7718481A FR 7718481 A FR7718481 A FR 7718481A FR 2394923 A1 FR2394923 A1 FR 2394923A1
Authority
FR
France
Prior art keywords
direct current
temperature characteristics
current amplifier
enhanced temperature
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.)
Granted
Application number
FR7718481A
Other languages
English (en)
Other versions
FR2394923B1 (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.)
R V CONSTRUCTIONS ELECTRIQUES
Original Assignee
R V CONSTRUCTIONS ELECTRIQUES
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 R V CONSTRUCTIONS ELECTRIQUES filed Critical R V CONSTRUCTIONS ELECTRIQUES
Priority to FR7718481A priority Critical patent/FR2394923A1/fr
Priority to US05/913,338 priority patent/US4207480A/en
Publication of FR2394923A1 publication Critical patent/FR2394923A1/fr
Application granted granted Critical
Publication of FR2394923B1 publication Critical patent/FR2394923B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/12—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using ionisation-sensitive elements, i.e. flame rods
    • F23N5/123—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using ionisation-sensitive elements, i.e. flame rods using electronic means
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/08—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements
    • H03F1/22—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements by use of cascode coupling, i.e. earthed cathode or emitter stage followed by earthed grid or base stage respectively
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
    • H03F1/302—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters in bipolar transistor amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/34—DC amplifiers in which all stages are DC-coupled
    • H03F3/343—DC amplifiers in which all stages are DC-coupled with semiconductor devices only

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Amplifiers (AREA)

Abstract

Amplificateur à courant continu, notamment pour courant de très faible intensité. Cet amplificateur est caractérisé en ce qu'il comporte comme étage d'entrée un premier et un second transistor bipolaire monté en cascode, ledit étage comprenant un circuit de polarisation propre à maintenir, au moins dans une certaine plage de températures, les potentiels de la base et du collecteur dudit premier transistor très voisins, et peut comprendre en outre un circuit de protection de la jonction base-émetteur dudit premier transistor. Principales applications : dispositifs de détection de flamme.
FR7718481A 1977-06-16 1977-06-16 Amplificateur a courant continu a caracteristiques en fonction de la temperature ameliorees Granted FR2394923A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR7718481A FR2394923A1 (fr) 1977-06-16 1977-06-16 Amplificateur a courant continu a caracteristiques en fonction de la temperature ameliorees
US05/913,338 US4207480A (en) 1977-06-16 1978-06-07 D.C. Amplifier with improved characteristics with respect to temperature

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7718481A FR2394923A1 (fr) 1977-06-16 1977-06-16 Amplificateur a courant continu a caracteristiques en fonction de la temperature ameliorees

Publications (2)

Publication Number Publication Date
FR2394923A1 true FR2394923A1 (fr) 1979-01-12
FR2394923B1 FR2394923B1 (fr) 1980-06-20

Family

ID=9192174

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7718481A Granted FR2394923A1 (fr) 1977-06-16 1977-06-16 Amplificateur a courant continu a caracteristiques en fonction de la temperature ameliorees

Country Status (2)

Country Link
US (1) US4207480A (fr)
FR (1) FR2394923A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2448107A1 (fr) * 1979-02-01 1980-08-29 Rv Const Electriques Dispositif electronique de securite pour un bruleur a combustible fluide, notamment gazeux

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5039952A (en) * 1990-04-20 1991-08-13 International Business Machines Corp. Electronic gain cell
JP5743850B2 (ja) * 2011-10-28 2015-07-01 株式会社東芝 集積回路

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3868581A (en) * 1973-07-20 1975-02-25 Rca Corp Current amplifier
SU495748A1 (ru) * 1973-11-26 1975-12-15 Предприятие П/Я А-7866 Транзисторный фильтр дл высоковольтных источников питани

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2448107A1 (fr) * 1979-02-01 1980-08-29 Rv Const Electriques Dispositif electronique de securite pour un bruleur a combustible fluide, notamment gazeux

Also Published As

Publication number Publication date
US4207480A (en) 1980-06-10
FR2394923B1 (fr) 1980-06-20

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Legal Events

Date Code Title Description
ST Notification of lapse