JPS56123125A - Photoelectric detector - Google Patents

Photoelectric detector

Info

Publication number
JPS56123125A
JPS56123125A JP2700380A JP2700380A JPS56123125A JP S56123125 A JPS56123125 A JP S56123125A JP 2700380 A JP2700380 A JP 2700380A JP 2700380 A JP2700380 A JP 2700380A JP S56123125 A JPS56123125 A JP S56123125A
Authority
JP
Japan
Prior art keywords
output
light
light emitting
width
latch circuit
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
Application number
JP2700380A
Other languages
Japanese (ja)
Inventor
Takao Katayama
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP2700380A priority Critical patent/JPS56123125A/en
Priority to DE19813107742 priority patent/DE3107742A1/en
Publication of JPS56123125A publication Critical patent/JPS56123125A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
    • H04B10/114—Indoor or close-range type systems
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/78—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled
    • H03K17/795—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled controlling bipolar transistors
    • H03K17/7955—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled controlling bipolar transistors using phototransistors

Abstract

PURPOSE: To prevent the influence of disturbing light by reducing the power consumption by photodetecting light that a light emitting element emits intermittently and by reading the photodetection output by varying the width of a signal driving the light emitting element.
CONSTITUTION: The output of oscillating circuit 28 drives driving circuit 29, whose output is applied via resistance 30 to transistor 31, which turns on light emitting diode 33. Light from diode 33 is photodetected by phototransistor 34, whose output is applied to latch circuit 36. The output of driving circuit 29, on the other hand, is applied to monostable vibrator 38 via inverter 37 to reduce its width and the output is applied to latch circuit 36 via inverter 39. Latch circuit 36 latches the photodetection output with narrow-width pulses, so that it will become hard to have the influence of disturbing light.
COPYRIGHT: (C)1981,JPO&Japio
JP2700380A 1980-03-04 1980-03-04 Photoelectric detector Pending JPS56123125A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2700380A JPS56123125A (en) 1980-03-04 1980-03-04 Photoelectric detector
DE19813107742 DE3107742A1 (en) 1980-03-04 1981-02-28 Photo-electric detector circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2700380A JPS56123125A (en) 1980-03-04 1980-03-04 Photoelectric detector

Publications (1)

Publication Number Publication Date
JPS56123125A true JPS56123125A (en) 1981-09-28

Family

ID=12208946

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2700380A Pending JPS56123125A (en) 1980-03-04 1980-03-04 Photoelectric detector

Country Status (2)

Country Link
JP (1) JPS56123125A (en)
DE (1) DE3107742A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3322896A1 (en) * 1983-06-23 1985-01-03 Siemens AG, 1000 Berlin und 8000 München CIRCUIT ARRANGEMENT FOR POTENTIAL-FREE DETECTION OF BINARY ELECTRICAL SIGNALS
DE3325926A1 (en) * 1983-07-19 1985-02-14 Telefunken electronic GmbH, 7100 Heilbronn RECEIVER AMPLIFIER FOR THE AMPLIFICATION OF A PHOTOSTROM
DE3717591A1 (en) * 1987-05-25 1988-12-08 Hartmann & Braun Ag CIRCUIT ARRANGEMENT FOR POTENTIAL-FREE DETECTION OF BINARY SIGNALS
US5026978A (en) * 1989-01-25 1991-06-25 Omron Corporation Photoelectric switch having pulse driver circuitry
GB2493742A (en) * 2011-08-17 2013-02-20 Bae Systems Plc A pulse stretcher for nuclear pulse measurements, using photo-coupler response time

Also Published As

Publication number Publication date
DE3107742A1 (en) 1982-02-11

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