JPS5652735A - Charging circuit for flash capacitor - Google Patents

Charging circuit for flash capacitor

Info

Publication number
JPS5652735A
JPS5652735A JP12964879A JP12964879A JPS5652735A JP S5652735 A JPS5652735 A JP S5652735A JP 12964879 A JP12964879 A JP 12964879A JP 12964879 A JP12964879 A JP 12964879A JP S5652735 A JPS5652735 A JP S5652735A
Authority
JP
Japan
Prior art keywords
current
base
negative pole
capacitor
flash capacitor
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
JP12964879A
Other languages
Japanese (ja)
Other versions
JPS5919636B2 (en
Inventor
Tadashi Okino
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP12964879A priority Critical patent/JPS5919636B2/en
Publication of JPS5652735A publication Critical patent/JPS5652735A/en
Publication of JPS5919636B2 publication Critical patent/JPS5919636B2/en
Expired legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE:To enable the negative pole of a flash capacitor and the negative pole of a primary electric source to be connected by supplying the current equivalent to the charging current of a flash capacitor to the base of an oscillating transistor. CONSTITUTION:The collector of a transistor TRQ2' of which the base is connected to the base of TRQ3' connected to the winding S of an oscillating transformer T. Because of this, the charging current of a flash capacitor C1, that is, the current equivalent to the collector current of the TRQ3' is formed as the collector current of the TRQ2' and this current is supplied as the base current of the TRQ1. Hence, even if the negative pole of the capacitor C1 is not connected to the base of the TRQ1, oscillation operatiom may be stably maintained and the negative pole of the capacitor C1 and the negative pole of a primary electric power source E may be connected. If this charging circuit is used, the charging voltage of the flash capacitor may be accurately detected.
JP12964879A 1979-10-08 1979-10-08 Charging circuit for flash capacitor Expired JPS5919636B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12964879A JPS5919636B2 (en) 1979-10-08 1979-10-08 Charging circuit for flash capacitor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12964879A JPS5919636B2 (en) 1979-10-08 1979-10-08 Charging circuit for flash capacitor

Publications (2)

Publication Number Publication Date
JPS5652735A true JPS5652735A (en) 1981-05-12
JPS5919636B2 JPS5919636B2 (en) 1984-05-08

Family

ID=15014706

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12964879A Expired JPS5919636B2 (en) 1979-10-08 1979-10-08 Charging circuit for flash capacitor

Country Status (1)

Country Link
JP (1) JPS5919636B2 (en)

Also Published As

Publication number Publication date
JPS5919636B2 (en) 1984-05-08

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