JPS5688122A - Control circuit - Google Patents
Control circuitInfo
- Publication number
- JPS5688122A JPS5688122A JP16552779A JP16552779A JPS5688122A JP S5688122 A JPS5688122 A JP S5688122A JP 16552779 A JP16552779 A JP 16552779A JP 16552779 A JP16552779 A JP 16552779A JP S5688122 A JPS5688122 A JP S5688122A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- signal
- signal processing
- signal generating
- turned
- 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
- Exposure Control For Cameras (AREA)
- Feedback Control In General (AREA)
Abstract
PURPOSE: To decrease the consumption of electric power in a control circuit of an electronic shutter camera, by turning to OFF the plural set signal generating circuits and signal processing circuits in a standby time by using an output signal from a control signal generating circuit consisting of a power source, a crystal oscillator circuit and a start signal generating circuit.
CONSTITUTION: Electric power is supplied from a power source 11 to a control signal generating circuit 12 including a crystal oscillator circuit 19 and a start signal generating circuit 18, thus said circuit is perating at all times. When a switch 20 or 21 is turned ON by pressing, for example, the shutter button of the camera, the output of an NAND gate 29 goes to 1, and the negative voltage of the power source 11 enters a signal processing circuit 13 via a transistor 17, thereby turning ON said circuit 13. On the other hand, the output of the circuit 29 enters a set signal circuit 38 via an inverter 30, and applies the set signal to a terminal 41 via an FET39. In addition, the reference clock signal of the crystal oscillator circuit 19 inputs to a terminal 36 via an NAND circuit 32, and the signal processing circuit 13 performs signal processing. When the switches 20, 21 are turned to OFF, the signal processing circuit 13 is turned to OFF and the circuit 38 consumes electric power no longer.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16552779A JPS5688122A (en) | 1979-12-21 | 1979-12-21 | Control circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16552779A JPS5688122A (en) | 1979-12-21 | 1979-12-21 | Control circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5688122A true JPS5688122A (en) | 1981-07-17 |
Family
ID=15814078
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16552779A Pending JPS5688122A (en) | 1979-12-21 | 1979-12-21 | Control circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5688122A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59141332U (en) * | 1983-03-12 | 1984-09-21 | 旭光学工業株式会社 | Camera shooting mode display switching circuit |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52143822A (en) * | 1976-05-26 | 1977-11-30 | Fuji Photo Optical Co Ltd | Exposure control circuit for camera |
-
1979
- 1979-12-21 JP JP16552779A patent/JPS5688122A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52143822A (en) * | 1976-05-26 | 1977-11-30 | Fuji Photo Optical Co Ltd | Exposure control circuit for camera |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59141332U (en) * | 1983-03-12 | 1984-09-21 | 旭光学工業株式会社 | Camera shooting mode display switching circuit |
JPH0453630Y2 (en) * | 1983-03-12 | 1992-12-16 |
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