JPS5752867A - Voltage detecting circuit - Google Patents

Voltage detecting circuit

Info

Publication number
JPS5752867A
JPS5752867A JP12831080A JP12831080A JPS5752867A JP S5752867 A JPS5752867 A JP S5752867A JP 12831080 A JP12831080 A JP 12831080A JP 12831080 A JP12831080 A JP 12831080A JP S5752867 A JPS5752867 A JP S5752867A
Authority
JP
Japan
Prior art keywords
voltage
current
photocoupler
power source
power consumption
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
JP12831080A
Other languages
Japanese (ja)
Inventor
Noriyuki Katsurayama
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 JP12831080A priority Critical patent/JPS5752867A/en
Publication of JPS5752867A publication Critical patent/JPS5752867A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/145—Indicating the presence of current or voltage
    • G01R19/155—Indicating the presence of voltage

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

PURPOSE:To enable to reduce power consumption, by connecting a constant current element at the photodiode side of a photocoupler in series to said photodiodes. CONSTITUTION:The generation of voltage with some magnitude in a power source 1 to be measured causes a current to flow through a constant current diode 5, and by the current, a photodiode 3 of a photocoupler is excited. Caused by said excitation, a phototransistor 4 of the photocoupler conducts, and terminals A and B are short-circuited to allow a voltage detection signal to be taken out. At that time, since a current I flowing through the constant current diode 5 is constant, power consumption P is proportional to voltage E of the power source 1 to be measured. Hereby, in case voltage E of the power source 1 to be measured varies largely, the power consumption can be reduced considerably as compared with conventional circuits.
JP12831080A 1980-09-16 1980-09-16 Voltage detecting circuit Pending JPS5752867A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12831080A JPS5752867A (en) 1980-09-16 1980-09-16 Voltage detecting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12831080A JPS5752867A (en) 1980-09-16 1980-09-16 Voltage detecting circuit

Publications (1)

Publication Number Publication Date
JPS5752867A true JPS5752867A (en) 1982-03-29

Family

ID=14981605

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12831080A Pending JPS5752867A (en) 1980-09-16 1980-09-16 Voltage detecting circuit

Country Status (1)

Country Link
JP (1) JPS5752867A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6246913U (en) * 1985-09-12 1987-03-23
JPS62265576A (en) * 1986-05-13 1987-11-18 Fuji Electric Co Ltd Low voltage detecting circuit
JPS6421943U (en) * 1987-07-29 1989-02-03
JPH0889839A (en) * 1994-09-19 1996-04-09 Masashi Yoshioka Flotation and sedimentation separator

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6246913U (en) * 1985-09-12 1987-03-23
JPS62265576A (en) * 1986-05-13 1987-11-18 Fuji Electric Co Ltd Low voltage detecting circuit
JPS6421943U (en) * 1987-07-29 1989-02-03
JPH0889839A (en) * 1994-09-19 1996-04-09 Masashi Yoshioka Flotation and sedimentation separator

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