JPS5652737A - Strobe circuit - Google Patents
Strobe circuitInfo
- Publication number
- JPS5652737A JPS5652737A JP12965279A JP12965279A JPS5652737A JP S5652737 A JPS5652737 A JP S5652737A JP 12965279 A JP12965279 A JP 12965279A JP 12965279 A JP12965279 A JP 12965279A JP S5652737 A JPS5652737 A JP S5652737A
- Authority
- JP
- Japan
- Prior art keywords
- trq
- goes
- power supply
- circuit
- switches
- 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
- Details Of Cameras Including Film Mechanisms (AREA)
- Stroboscope Apparatuses (AREA)
- Dc-Dc Converters (AREA)
Abstract
PURPOSE: To decrease the number of mechanical switches in a camera built in with a winding motor by providing a circuit element which surely disables the oscillation of an oscillating transistor to said transistor.
CONSTITUTION: A circuit element Z which increases the apparent base-emitter voltage of an oscillating transistor TRQ1 is provided to hold the TRQ1 surely in an OFF state. When a switch SW1 is turned ON, the electric charging to a main capacitor C2 is started by the oscillation operation of the TRQ1. Since at this time the switches SW3, SW2 are both OFF, the electric power is used for the strobe circuit only. Next, when release is operated, the switch SW3 goes ON and the power supply to a photographing control circuit CC is accomplished; at the same time the TRQ1 goes off to stop the power supply to the strobe circuit. When flash photographing ends in succession to this, the SW3 goes OFF and the SW2 goes ON to supply the power to the winding motor. Since the element Z is provided in this way, the power supply may be controlled accurately time serially with a less number of switches.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12965279A JPS5652737A (en) | 1979-10-08 | 1979-10-08 | Strobe circuit |
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 |
---|---|---|---|
JP12965279A JPS5652737A (en) | 1979-10-08 | 1979-10-08 | Strobe circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5652737A true JPS5652737A (en) | 1981-05-12 |
Family
ID=15014803
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12965279A Pending JPS5652737A (en) | 1979-10-08 | 1979-10-08 | Strobe circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5652737A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57130827U (en) * | 1981-02-06 | 1982-08-14 | ||
JPS62152719A (en) * | 1985-12-26 | 1987-07-07 | Sekisui Plastics Co Ltd | Method of forming foamed sheet and device thereof |
EP0364355A2 (en) * | 1988-10-11 | 1990-04-18 | Sony Corporation | Spindle servo control for electronic still camera |
US6434027B1 (en) | 1998-03-11 | 2002-08-13 | Murata Manufacturing Co., Ltd. | Switching power supply having a plurality of output voltages and minimal number of terminals |
-
1979
- 1979-10-08 JP JP12965279A patent/JPS5652737A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57130827U (en) * | 1981-02-06 | 1982-08-14 | ||
JPS62152719A (en) * | 1985-12-26 | 1987-07-07 | Sekisui Plastics Co Ltd | Method of forming foamed sheet and device thereof |
EP0364355A2 (en) * | 1988-10-11 | 1990-04-18 | Sony Corporation | Spindle servo control for electronic still camera |
US5218451A (en) * | 1988-10-11 | 1993-06-08 | Sony Corporation | Spindle servo control for electronic still camera |
US6434027B1 (en) | 1998-03-11 | 2002-08-13 | Murata Manufacturing Co., Ltd. | Switching power supply having a plurality of output voltages and minimal number of terminals |
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