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JPS5614926A - Photoelectric conversion circuit - Google Patents

Photoelectric conversion circuit

Info

Publication number
JPS5614926A
JPS5614926A JP9125279A JP9125279A JPS5614926A JP S5614926 A JPS5614926 A JP S5614926A JP 9125279 A JP9125279 A JP 9125279A JP 9125279 A JP9125279 A JP 9125279A JP S5614926 A JPS5614926 A JP S5614926A
Authority
JP
Japan
Prior art keywords
inversive
input terminal
diode
operational amplifier
output
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
JP9125279A
Other languages
Japanese (ja)
Other versions
JPS621201B2 (en
Inventor
Akinori Takahashi
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP9125279A priority Critical patent/JPS5614926A/en
Publication of JPS5614926A publication Critical patent/JPS5614926A/en
Publication of JPS621201B2 publication Critical patent/JPS621201B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
    • G01J1/44—Electric circuits

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Abstract

PURPOSE:To prolong the life of a power source such as a battery or the like by constituting the circuit so that it can operate at a low source voltage. CONSTITUTION:A photodiode 32 is connected between an inversive input terminal and a non-inversive input terminal of an operational amplifier 31, and the inversive input terminal is connected through a diode 33 to an output terminal and a constant voltage is applied to the non-inversive input terminal. The output terminal of the operational amplifier 31 is connected through a diode 34 to the non-inversive input terminal of an operational amplifier 35, and an output signal is led out from the output terminal 36 of operational amplifier 35. When a light beam 37 is incident on the photodiode 32, a photocurrent IP corresponding to the intensity of the light beam flows through the diode 33. A constant current IK flows through the diode 34. The output voltage obtained at the output terminal 36 becomes one in which the photocurrent IP has been logarithmically converted.
JP9125279A 1979-07-18 1979-07-18 Photoelectric conversion circuit Granted JPS5614926A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9125279A JPS5614926A (en) 1979-07-18 1979-07-18 Photoelectric conversion circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9125279A JPS5614926A (en) 1979-07-18 1979-07-18 Photoelectric conversion circuit

Publications (2)

Publication Number Publication Date
JPS5614926A true JPS5614926A (en) 1981-02-13
JPS621201B2 JPS621201B2 (en) 1987-01-12

Family

ID=14021223

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9125279A Granted JPS5614926A (en) 1979-07-18 1979-07-18 Photoelectric conversion circuit

Country Status (1)

Country Link
JP (1) JPS5614926A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0634108A (en) * 1992-07-16 1994-02-08 Nittetsu Muroran Eng Kk Pot type petroleum burner
JP2009272979A (en) * 2008-05-09 2009-11-19 Oki Semiconductor Co Ltd Semiconductor circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0634108A (en) * 1992-07-16 1994-02-08 Nittetsu Muroran Eng Kk Pot type petroleum burner
JP2009272979A (en) * 2008-05-09 2009-11-19 Oki Semiconductor Co Ltd Semiconductor circuit

Also Published As

Publication number Publication date
JPS621201B2 (en) 1987-01-12

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