JPS56116343A - Power supply voltage regulating circuit for optical relay device - Google Patents

Power supply voltage regulating circuit for optical relay device

Info

Publication number
JPS56116343A
JPS56116343A JP1958480A JP1958480A JPS56116343A JP S56116343 A JPS56116343 A JP S56116343A JP 1958480 A JP1958480 A JP 1958480A JP 1958480 A JP1958480 A JP 1958480A JP S56116343 A JPS56116343 A JP S56116343A
Authority
JP
Japan
Prior art keywords
current
circuit
constant
power supply
supply voltage
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
JP1958480A
Other languages
Japanese (ja)
Inventor
Haruo Fujiwara
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP1958480A priority Critical patent/JPS56116343A/en
Publication of JPS56116343A publication Critical patent/JPS56116343A/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
    • H04B10/50—Transmitters

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To enable to regulate the operation as a relay device at good state at all times, by making constant the current flowing to a Zenor diode with a dummy circuit, in a photorelay device in constant voltage power supply by means of the Zenor diode. CONSTITUTION:When the output Vp of an automatic light emission output control APC circuit is increased, if the current I1 flowing to a transistor TR1 is increased, the current I2 flowing to a transistor TR2 is decreased with the signal inversion INV circuit of the dummy DM circuit, and control is made so that the sum of the both I1+I2 is almost constant. Thus, even if the bias current of laser LD in a photorelay devide is changed, since the current flowing to the Zener diode ZD2 is constant, the supply voltage to the photorelay device can almost be unchanged.
JP1958480A 1980-02-19 1980-02-19 Power supply voltage regulating circuit for optical relay device Pending JPS56116343A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1958480A JPS56116343A (en) 1980-02-19 1980-02-19 Power supply voltage regulating circuit for optical relay device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1958480A JPS56116343A (en) 1980-02-19 1980-02-19 Power supply voltage regulating circuit for optical relay device

Publications (1)

Publication Number Publication Date
JPS56116343A true JPS56116343A (en) 1981-09-12

Family

ID=12003300

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1958480A Pending JPS56116343A (en) 1980-02-19 1980-02-19 Power supply voltage regulating circuit for optical relay device

Country Status (1)

Country Link
JP (1) JPS56116343A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4652778A (en) * 1982-10-20 1987-03-24 Sanyo Electric Co., Ltd. I2 L delay circuit with phase comparator and temperature compensator for maintaining a constant delay time
JPH05268167A (en) * 1992-03-19 1993-10-15 Mitsubishi Electric Corp Optical repeater

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4652778A (en) * 1982-10-20 1987-03-24 Sanyo Electric Co., Ltd. I2 L delay circuit with phase comparator and temperature compensator for maintaining a constant delay time
JPH05268167A (en) * 1992-03-19 1993-10-15 Mitsubishi Electric Corp Optical repeater

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