FR2371815A1 - Circuit de regulation de tension pour osc illateur convertisseur courant continu/courant continu utilisable notamment dans un flash electronique - Google Patents

Circuit de regulation de tension pour osc illateur convertisseur courant continu/courant continu utilisable notamment dans un flash electronique

Info

Publication number
FR2371815A1
FR2371815A1 FR7733205A FR7733205A FR2371815A1 FR 2371815 A1 FR2371815 A1 FR 2371815A1 FR 7733205 A FR7733205 A FR 7733205A FR 7733205 A FR7733205 A FR 7733205A FR 2371815 A1 FR2371815 A1 FR 2371815A1
Authority
FR
France
Prior art keywords
direct current
oscillator
transistor
electronic flash
regulation circuit
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
FR7733205A
Other languages
English (en)
Other versions
FR2371815B1 (fr
Inventor
George C Harrison
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.)
Polaroid Corp
Original Assignee
Polaroid Corp
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 Polaroid Corp filed Critical Polaroid Corp
Publication of FR2371815A1 publication Critical patent/FR2371815A1/fr
Application granted granted Critical
Publication of FR2371815B1 publication Critical patent/FR2371815B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/30—Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp
    • H05B41/32—Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp for single flash operation

Landscapes

  • Dc-Dc Converters (AREA)
  • Stroboscope Apparatuses (AREA)
  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)

Abstract

Circuit de régulation de tension simplifié conçu pour commander le fonctionnement d'un oscillateur convertisseur courant continu/courant continu comme on en utilise couramment dans un flash électronique, de façon que sa tension de sortie soit maintenue dans une gamme prescrite. Le circuit comprend un transistor ordinaire commande par une diode Zéner qui met en marche le transistor et ainsi met fin au fonctionnement de l'oscillateur lorsque sa tension de sortie atteint sa valeur maximale dans la gamme prescrite. Un condensateur est également chargé par le transistor et la charge résiduelle du condensateur agit en dépit de l'état non conducteur que prennent ensuite la diode et le transistor pour maintenir l'oscillateur arrêtés jusqu'à ce que la tension de sortie de l'oscillateur décroisse vers sa valeur minimale dans la gamme prescrite.
FR7733205A 1976-11-19 1977-11-04 Circuit de regulation de tension pour osc illateur convertisseur courant continu/courant continu utilisable notamment dans un flash electronique Granted FR2371815A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/743,115 US4068151A (en) 1976-11-19 1976-11-19 Regulated strobe with hysteresis

Publications (2)

Publication Number Publication Date
FR2371815A1 true FR2371815A1 (fr) 1978-06-16
FR2371815B1 FR2371815B1 (fr) 1983-07-08

Family

ID=24987573

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7733205A Granted FR2371815A1 (fr) 1976-11-19 1977-11-04 Circuit de regulation de tension pour osc illateur convertisseur courant continu/courant continu utilisable notamment dans un flash electronique

Country Status (6)

Country Link
US (1) US4068151A (fr)
JP (1) JPS5364517A (fr)
CA (1) CA1064096A (fr)
DE (1) DE2747416A1 (fr)
FR (1) FR2371815A1 (fr)
GB (1) GB1586087A (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4156565A (en) * 1978-03-23 1979-05-29 Polaroid Corporation Control system for flash-illuminated automatic focusing camera
US4162836A (en) * 1978-06-21 1979-07-31 Polaroid Corporation Electronic flash inhibit arrangement
USRE30534E (en) * 1979-10-17 1981-03-03 Polaroid Corporation Electronic flash inhibit arrangement
US4451772A (en) * 1982-09-09 1984-05-29 Eastman Kodak Company Passive clamp for on/off control of a capacitor charger
US4464608A (en) * 1982-09-13 1984-08-07 Warner Lambert Technologies, Inc. Circuit for controlling optical apparatus such as an ophthalmoscope
NL8502338A (nl) * 1985-08-26 1987-03-16 Philips Nv Geschakelde voedingsspanningsschakeling met twee toestanden.
US4754389A (en) * 1986-06-04 1988-06-28 Eastman Kodak Company Voltage regulating circuitry for a DC to DC converter
US5028861A (en) * 1989-05-24 1991-07-02 Motorola, Inc. Strobed DC-DC converter with current regulation
US5285779A (en) * 1992-03-27 1994-02-15 Hewlett-Packard Company Method and apparatus for a cardiac defibrillator high voltage charging circuit

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2142735A1 (fr) * 1971-06-24 1973-02-02 West Electric Co
US3863128A (en) * 1973-07-30 1975-01-28 Honeywell Inc Voltage monitoring controlling and protecting apparatus employing programmable unijunction transistor
US3962601A (en) * 1975-02-18 1976-06-08 Stanley Wrzesinski Zero crossing relay controlled circuit for high power discharge devices
FR2293737A1 (fr) * 1974-12-06 1976-07-02 Bosch Gmbh Robert Montage electrique pour obtenir une tension de sortie stable

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1069706B (fr) * 1959-11-26
US3012181A (en) * 1958-12-29 1961-12-05 Gen Electric Transistor low drain converter
US3316445A (en) * 1963-04-26 1967-04-25 Rca Corp Transistorized power supply for a storage capacitor with a regulating feedback control
JPS5419778B1 (fr) * 1971-06-18 1979-07-18
US3822393A (en) * 1972-10-11 1974-07-02 Berkey Photo Inc Electronic strobe

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2142735A1 (fr) * 1971-06-24 1973-02-02 West Electric Co
US3863128A (en) * 1973-07-30 1975-01-28 Honeywell Inc Voltage monitoring controlling and protecting apparatus employing programmable unijunction transistor
FR2293737A1 (fr) * 1974-12-06 1976-07-02 Bosch Gmbh Robert Montage electrique pour obtenir une tension de sortie stable
US3962601A (en) * 1975-02-18 1976-06-08 Stanley Wrzesinski Zero crossing relay controlled circuit for high power discharge devices

Also Published As

Publication number Publication date
US4068151A (en) 1978-01-10
JPS6237770B2 (fr) 1987-08-14
DE2747416C2 (fr) 1989-07-13
JPS5364517A (en) 1978-06-09
GB1586087A (en) 1981-03-18
DE2747416A1 (de) 1978-05-24
FR2371815B1 (fr) 1983-07-08
CA1064096A (fr) 1979-10-09

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Legal Events

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ST Notification of lapse