[go: up one dir, main page]

JPS5421340A - Electronic shutter drive device for camera which uses logarithm extension circuit - Google Patents

Electronic shutter drive device for camera which uses logarithm extension circuit

Info

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
Application number
JP8575277A
Other languages
Japanese (ja)
Other versions
JPS628774B2 (en
Inventor
Masamichi Furukawa
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP8575277A priority Critical patent/JPS5421340A/en
Priority to US05/923,903 priority patent/US4213683A/en
Priority to DE2831520A priority patent/DE2831520C3/en
Publication of JPS5421340A publication Critical patent/JPS5421340A/en
Publication of JPS628774B2 publication Critical patent/JPS628774B2/ja
Granted legal-status Critical Current

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
JP8575277A 1977-07-18 1977-07-18 Electronic shutter drive device for camera which uses logarithm extension circuit Granted JPS5421340A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5062433A (en) * 1973-10-02 1975-05-28

Patent Citations (1)

* Cited by examiner, † Cited by third party
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

Similar Documents

Publication Publication Date Title
JPS52120768A (en) Semiconductor device
JPS5421337A (en) Display method for level check and its circuit
JPS5326175A (en) Electronic watch
JPS5436557A (en) Constant current circuit
JPS5421340A (en) Electronic shutter drive device for camera which uses logarithm extension circuit
JPS5344135A (en) Function test equipment for logical operation circuit
JPS52147288A (en) Misoperation prevention equipment
JPS5441130A (en) Electric power switch circuit for camera
JPS5441443A (en) Integrated circuit device
JPS5312248A (en) Voltage variable memory device
JPS544545A (en) Charge transfer device
JPS53118021A (en) Power driving device of cameras
JPS5434823A (en) Input-output circuit
JPS53107330A (en) Shutter driving device
JPS5410958A (en) Power source circuit
JPS52101952A (en) Voltage control variable gain circuit
JPS5434819A (en) Electronic shutter driving device by use of logarithm extension circuit
JPS53118724A (en) Step-down circuit
JPS5427685A (en) Power level setting and indicating circuit
JPS5379393A (en) Hall power generator device
JPS5389952A (en) Constant voltage circuit
Morgan Analysis of digital AGC amplifiers using the discrete-time Volterra series
JPS52149442A (en) Voltage dividing circuit
JPS5424675A (en) Data input device in measuring apparatus
JPS5375652A (en) Speed commanding apparatus for elevator