JPS57182120A - Photocoupler device - Google Patents

Photocoupler device

Info

Publication number
JPS57182120A
JPS57182120A JP6618481A JP6618481A JPS57182120A JP S57182120 A JPS57182120 A JP S57182120A JP 6618481 A JP6618481 A JP 6618481A JP 6618481 A JP6618481 A JP 6618481A JP S57182120 A JPS57182120 A JP S57182120A
Authority
JP
Japan
Prior art keywords
ratio
resistance
circuit
series
led
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
JP6618481A
Other languages
Japanese (ja)
Other versions
JPS6349162B2 (en
Inventor
Toshitaka Yagio
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.)
Nikon Corp
Original Assignee
Nikon Corp
Nippon Kogaku KK
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 Nikon Corp, Nippon Kogaku KK filed Critical Nikon Corp
Priority to JP6618481A priority Critical patent/JPS57182120A/en
Publication of JPS57182120A publication Critical patent/JPS57182120A/en
Publication of JPS6349162B2 publication Critical patent/JPS6349162B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
    • G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
    • G05F1/561—Voltage to current converters

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Electronic Switches (AREA)
  • Optical Transform (AREA)

Abstract

PURPOSE:To remove variations in the power source voltage by supplying power to a circuit in which a resistance and a light emitting element and a resistance and a light receiving element are connected in series respectively from a common power source circuit to almost equalize the current ratio between the light emitting element and the light receiving element and the ratio between resistances separately connected in series thereto. CONSTITUTION:A first circuit in which an LED 9 and a resistance RL are connected in series and a second circuit in which a photo transistor 11 and a resistance RP are connected in series are both supplied with a power from a power source voltage Vcc. When the quantity of incidence light of the photo transistor 11 is an intermediate value, the output voltage Vo of the photo transistor 11 and the forward breakdown voltage Vt of the LED 9 are adjusted so as to be equal. At this point, the ratio between the current If flowing through an LED 9 and the ratio of photovoltaic current IC generated in the phototransistor 11 and the ratio between the resistances RL and RP are determined to be equal.
JP6618481A 1981-05-02 1981-05-02 Photocoupler device Granted JPS57182120A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6618481A JPS57182120A (en) 1981-05-02 1981-05-02 Photocoupler device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6618481A JPS57182120A (en) 1981-05-02 1981-05-02 Photocoupler device

Publications (2)

Publication Number Publication Date
JPS57182120A true JPS57182120A (en) 1982-11-09
JPS6349162B2 JPS6349162B2 (en) 1988-10-03

Family

ID=13308497

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6618481A Granted JPS57182120A (en) 1981-05-02 1981-05-02 Photocoupler device

Country Status (1)

Country Link
JP (1) JPS57182120A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60201726A (en) * 1984-03-26 1985-10-12 Shimadzu Corp Digital-analog converter
CN108469853A (en) * 2018-05-10 2018-08-31 重庆第二师范学院 A kind of chemical reaction automatic heat preserving controller

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60201726A (en) * 1984-03-26 1985-10-12 Shimadzu Corp Digital-analog converter
CN108469853A (en) * 2018-05-10 2018-08-31 重庆第二师范学院 A kind of chemical reaction automatic heat preserving controller

Also Published As

Publication number Publication date
JPS6349162B2 (en) 1988-10-03

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