FR2374706A1 - Circuit electrique pour la commande d'alarmes sonores - Google Patents

Circuit electrique pour la commande d'alarmes sonores

Info

Publication number
FR2374706A1
FR2374706A1 FR7737803A FR7737803A FR2374706A1 FR 2374706 A1 FR2374706 A1 FR 2374706A1 FR 7737803 A FR7737803 A FR 7737803A FR 7737803 A FR7737803 A FR 7737803A FR 2374706 A1 FR2374706 A1 FR 2374706A1
Authority
FR
France
Prior art keywords
coupled
terminal
transistors
load
transistor
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.)
Pending
Application number
FR7737803A
Other languages
English (en)
Inventor
William Peil
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of FR2374706A1 publication Critical patent/FR2374706A1/fr
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/26—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback
    • H03K3/28—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback
    • H03K3/281—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator
    • H03K3/286—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator bistable
    • H03K3/288—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator bistable using additional transistors in the input circuit
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00—Audible signalling systems; Audible personal calling systems
    • G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
    • H03K17/66—Switching arrangements for passing the current in either direction at will; Switching arrangements for reversing the current at will
    • H03K17/661—Switching arrangements for passing the current in either direction at will; Switching arrangements for reversing the current at will connected to both load terminals
    • H03K17/662—Switching arrangements for passing the current in either direction at will; Switching arrangements for reversing the current at will connected to both load terminals each output circuit comprising more than one controlled bipolar transistor

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Amplifiers (AREA)
  • Fire Alarms (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Alarm Systems (AREA)

Abstract

Circuit ayant une faible consommation de courant et pouvant fonctionner sur batterie. Il comprend une première et une seconde bornes 15, 20 pour la connexion à une source continue 27, une charge 14 comprenant une première et une seconde bornes 21, 22, un pont à quatre bornes et quatre transistors Q14, Q15, Q16, Q17 dont le premier transistor est couplé entre la première borne source 15 et la première borne de charge 21, le second transistor est couplé entre la première borne source 15 et la seconde borne de charge 22, le troisième transistor est couplé entre la seconde borne de charge 22 et la seconde borne source 20, le quatrième transistor est couplé entre la première borne de charge 21 et la seconde borne source 20, un dispositif de polarisation Q6, Q22, Q23, D5, R10 et R12 couplé aux transistors pour fournir une polarisation directe momentanément interrompue, un dispositif à couplage croisé Q18, Q19, R13, R14, R15 et R16 couplé aux transistors pour assurer une conduction stable dans le couple de transistors pairs ou le couple de transistors impairs pendant la polarisation directe, et un dispositif de commutation Q20, Q21 couplé aux transistors, réagissant à une énergie inductive stockée dans la charge. Application aux detecteurs de fumée.
FR7737803A 1976-12-17 1977-12-15 Circuit electrique pour la commande d'alarmes sonores Pending FR2374706A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/751,882 US4079271A (en) 1976-12-17 1976-12-17 Alarm driver for a smoke detector

Publications (1)

Publication Number Publication Date
FR2374706A1 true FR2374706A1 (fr) 1978-07-13

Family

ID=25023912

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7737803A Pending FR2374706A1 (fr) 1976-12-17 1977-12-15 Circuit electrique pour la commande d'alarmes sonores

Country Status (9)

Country Link
US (1) US4079271A (fr)
JP (1) JPS5394800A (fr)
AU (1) AU504991B2 (fr)
BE (1) BE861926A (fr)
CA (1) CA1096450A (fr)
DE (1) DE2755670A1 (fr)
FR (1) FR2374706A1 (fr)
GB (1) GB1587740A (fr)
NL (1) NL7714016A (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4496849A (en) * 1982-02-22 1985-01-29 General Motors Corporation Power transistor protection from substrate injection
US4511809A (en) * 1983-01-27 1985-04-16 Motorola, Inc. Switch circuit having improved switching characteristics
US5077756A (en) * 1990-05-31 1991-12-31 Acculan Ltd. Data network line driver
ES2090788T3 (es) * 1992-07-07 1996-10-16 Siemens Ag Circuito excitador integrable para una carga reactiva.
US5990797A (en) * 1997-03-04 1999-11-23 Bkk Brands, Inc. Ultraloud smoke detector
US6509838B1 (en) * 2000-02-08 2003-01-21 Peter P. Payne Constant current flame ionization circuit

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3237125A (en) * 1962-11-14 1966-02-22 Honeywell Inc Frequency stabilized saturable core oscillator
US3260996A (en) * 1960-09-03 1966-07-12 Telefunken Patent Matrix selection circuit
US3473051A (en) * 1966-02-08 1969-10-14 Sylvania Electric Prod Bistable logic circuit
DE1955890A1 (de) * 1968-11-06 1970-06-18 Sylvania Electric Prod Transistor-Logikschaltung
US3684983A (en) * 1970-06-19 1972-08-15 E & M Lab High speed circulator switch

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3538353A (en) * 1967-10-13 1970-11-03 Gen Electric Switching circuit
US3770986A (en) * 1972-04-20 1973-11-06 Hewlett Packard Co Switching circuit for inductive loads

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3260996A (en) * 1960-09-03 1966-07-12 Telefunken Patent Matrix selection circuit
US3237125A (en) * 1962-11-14 1966-02-22 Honeywell Inc Frequency stabilized saturable core oscillator
US3473051A (en) * 1966-02-08 1969-10-14 Sylvania Electric Prod Bistable logic circuit
DE1955890A1 (de) * 1968-11-06 1970-06-18 Sylvania Electric Prod Transistor-Logikschaltung
FR2022702A1 (fr) * 1968-11-06 1970-08-07 Sylvania Electric Prod
US3684983A (en) * 1970-06-19 1972-08-15 E & M Lab High speed circulator switch

Also Published As

Publication number Publication date
US4079271A (en) 1978-03-14
NL7714016A (nl) 1978-06-20
JPS5394800A (en) 1978-08-19
GB1587740A (en) 1981-04-08
CA1096450A (fr) 1981-02-24
DE2755670A1 (de) 1978-06-22
BE861926A (fr) 1978-04-14
AU504991B2 (en) 1979-11-01
AU3098477A (en) 1979-05-31

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