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JPS5439509A - Dc current supplying circuit - Google Patents

Dc current supplying circuit

Info

Publication number
JPS5439509A
JPS5439509A JP10581777A JP10581777A JPS5439509A JP S5439509 A JPS5439509 A JP S5439509A JP 10581777 A JP10581777 A JP 10581777A JP 10581777 A JP10581777 A JP 10581777A JP S5439509 A JPS5439509 A JP S5439509A
Authority
JP
Japan
Prior art keywords
supplying circuit
current supplying
current
output
establish
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
JP10581777A
Other languages
Japanese (ja)
Inventor
Koji Inoue
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 JP10581777A priority Critical patent/JPS5439509A/en
Publication of JPS5439509A publication Critical patent/JPS5439509A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/001—Current supply source at the exchanger providing current to substations
    • H04M19/005—Feeding arrangements without the use of line transformers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)

Abstract

PURPOSE:To establish AC high impedance performance at low current supply, by obtaining the output having desired characteristics through the constant voltage control of current output transistors, in the current supplying circuit used for the terminal unit of a telephone exchanger.
JP10581777A 1977-09-05 1977-09-05 Dc current supplying circuit Pending JPS5439509A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10581777A JPS5439509A (en) 1977-09-05 1977-09-05 Dc current supplying circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10581777A JPS5439509A (en) 1977-09-05 1977-09-05 Dc current supplying circuit

Publications (1)

Publication Number Publication Date
JPS5439509A true JPS5439509A (en) 1979-03-27

Family

ID=14417626

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10581777A Pending JPS5439509A (en) 1977-09-05 1977-09-05 Dc current supplying circuit

Country Status (1)

Country Link
JP (1) JPS5439509A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4642548A (en) * 1984-07-25 1987-02-10 Hitachi, Ltd. Control apparatus for charging generator
JPS62257260A (en) * 1986-04-30 1987-11-09 Sharp Corp Power transmission equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4642548A (en) * 1984-07-25 1987-02-10 Hitachi, Ltd. Control apparatus for charging generator
JPS62257260A (en) * 1986-04-30 1987-11-09 Sharp Corp Power transmission equipment

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