JPS5652736A - Flash device - Google Patents
Flash deviceInfo
- Publication number
- JPS5652736A JPS5652736A JP12965079A JP12965079A JPS5652736A JP S5652736 A JPS5652736 A JP S5652736A JP 12965079 A JP12965079 A JP 12965079A JP 12965079 A JP12965079 A JP 12965079A JP S5652736 A JPS5652736 A JP S5652736A
- Authority
- JP
- Japan
- Prior art keywords
- diode
- trq1
- series
- emitter
- 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.)
- Pending
Links
Landscapes
- Stroboscope Apparatuses (AREA)
- Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
- Dc-Dc Converters (AREA)
Abstract
PURPOSE:To achieve the saving of power consumption by series-connecting a Zener diode to the diode connected between the base and emitter of an NPN transistor for oscillation. CONSTITUTION:A Zener diode ZD1 is series-connected to the diode D2 for protecting transistor connected between the base and emitter of an oscillating trnasistor TRQ1. At the time when the TRQ1 shifts from ON to OFF in the process of oscillation action, a counter electromotive voltage is generated in the coil L3 of an oscillating transformer. This counter electromotive voltage is applied to the series circuit of the diodes D2, ZD1, but since the diode D2 is maintained in a non-conducting state by the diode ZD1, the inverse charging to the capacitor C2 is prevented. In this way, the protection of the TRQ1 may be performed and the wasteful power consumption owing to the chraging and discharging of the capacitor C2 may be eliminated.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12965079A JPS5652736A (en) | 1979-10-08 | 1979-10-08 | Flash device |
US06/193,458 US4306281A (en) | 1979-10-08 | 1980-10-03 | DC-DC Converter for electronic flash unit |
DE19803037863 DE3037863A1 (en) | 1979-10-08 | 1980-10-07 | DC / DC CONVERTER FOR ELECTRIC FLASH UNITS |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12965079A JPS5652736A (en) | 1979-10-08 | 1979-10-08 | Flash device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5652736A true JPS5652736A (en) | 1981-05-12 |
Family
ID=15014755
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12965079A Pending JPS5652736A (en) | 1979-10-08 | 1979-10-08 | Flash device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5652736A (en) |
-
1979
- 1979-10-08 JP JP12965079A patent/JPS5652736A/en active Pending
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