JPS56103330A - Infrared signal receiver - Google Patents

Infrared signal receiver

Info

Publication number
JPS56103330A
JPS56103330A JP571680A JP571680A JPS56103330A JP S56103330 A JPS56103330 A JP S56103330A JP 571680 A JP571680 A JP 571680A JP 571680 A JP571680 A JP 571680A JP S56103330 A JPS56103330 A JP S56103330A
Authority
JP
Japan
Prior art keywords
external disturbance
gain control
disturbance light
resistance
fluorescent lamp
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
JP571680A
Other languages
Japanese (ja)
Other versions
JPS6114447B2 (en
Inventor
Takashi Takeuchi
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP571680A priority Critical patent/JPS56103330A/en
Publication of JPS56103330A publication Critical patent/JPS56103330A/en
Publication of JPS6114447B2 publication Critical patent/JPS6114447B2/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 prevent the effect of external disturbance light by knowing the magnitude of the infrared component of the external disturbance light from the magnitude of the current flowing in an infrared detecting element, discriminating fluorescent lamp noise from incandescent lamp noise and preventing automatic gain control from acting upon the fluorescent lamp noise. CONSTITUTION:The DC current by the external disturbance light incident to an infrared detecting element 1 is detected as a voltage drop across a resistance 6, and an automatic gain control circuit 8 is intermitted by a transistor TR switch 7. Namely, when the voltage across the resistance 6 rises higher than the voltage between the base and emitter of the TR7 on increasing of the current flowing the resistance 6, the TR7 goes ON. Under the external disturbance light of the same illuminance, the gain control does not act and a maximum gain is obtained with a fluorescent lamp and the gain having received the gain control is obtained with an incandscent lamp.
JP571680A 1980-01-23 1980-01-23 Infrared signal receiver Granted JPS56103330A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP571680A JPS56103330A (en) 1980-01-23 1980-01-23 Infrared signal receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP571680A JPS56103330A (en) 1980-01-23 1980-01-23 Infrared signal receiver

Publications (2)

Publication Number Publication Date
JPS56103330A true JPS56103330A (en) 1981-08-18
JPS6114447B2 JPS6114447B2 (en) 1986-04-18

Family

ID=11618833

Family Applications (1)

Application Number Title Priority Date Filing Date
JP571680A Granted JPS56103330A (en) 1980-01-23 1980-01-23 Infrared signal receiver

Country Status (1)

Country Link
JP (1) JPS56103330A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0346940U (en) * 1989-09-12 1991-04-30
JPH0533434U (en) * 1991-10-08 1993-04-30 オムロン株式会社 Flow velocity or flow sensor

Also Published As

Publication number Publication date
JPS6114447B2 (en) 1986-04-18

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