JPS5421340A - Electronic shutter drive device for camera which uses logarithm extension circuit - Google Patents
Electronic shutter drive device for camera which uses logarithm extension circuitInfo
- Publication number
- JPS5421340A JPS5421340A JP8575277A JP8575277A JPS5421340A JP S5421340 A JPS5421340 A JP S5421340A JP 8575277 A JP8575277 A JP 8575277A JP 8575277 A JP8575277 A JP 8575277A JP S5421340 A JPS5421340 A JP S5421340A
- Authority
- JP
- Japan
- Prior art keywords
- extension circuit
- camera
- drive device
- electronic shutter
- shutter drive
- 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
Links
Landscapes
- Exposure Control For Cameras (AREA)
- Shutter-Related Mechanisms (AREA)
- Electronic Switches (AREA)
Abstract
PURPOSE: To allow to carry out a good precise action with a single electric power by connecting plural resistor elements in series to the inversion input terminal of an operational amplifier, and using the logarithm extension circuit coupled to a capacity element at respective connecting points of the resistor element.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8575277A JPS5421340A (en) | 1977-07-18 | 1977-07-18 | Electronic shutter drive device for camera which uses logarithm extension circuit |
US05/923,903 US4213683A (en) | 1977-07-18 | 1978-07-12 | Electronic shutter driving device for camera |
DE2831520A DE2831520C3 (en) | 1977-07-18 | 1978-07-18 | Electronic shutter control device for a camera |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8575277A JPS5421340A (en) | 1977-07-18 | 1977-07-18 | Electronic shutter drive device for camera which uses logarithm extension circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5421340A true JPS5421340A (en) | 1979-02-17 |
JPS628774B2 JPS628774B2 (en) | 1987-02-24 |
Family
ID=13867578
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8575277A Granted JPS5421340A (en) | 1977-07-18 | 1977-07-18 | Electronic shutter drive device for camera which uses logarithm extension circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5421340A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03212081A (en) * | 1990-01-17 | 1991-09-17 | Sharp Corp | Magnetic recording and reproducing device |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5062433A (en) * | 1973-10-02 | 1975-05-28 |
-
1977
- 1977-07-18 JP JP8575277A patent/JPS5421340A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5062433A (en) * | 1973-10-02 | 1975-05-28 |
Also Published As
Publication number | Publication date |
---|---|
JPS628774B2 (en) | 1987-02-24 |
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