JPS5725766A - Electronic feeding circuit - Google Patents

Electronic feeding circuit

Info

Publication number
JPS5725766A
JPS5725766A JP10078880A JP10078880A JPS5725766A JP S5725766 A JPS5725766 A JP S5725766A JP 10078880 A JP10078880 A JP 10078880A JP 10078880 A JP10078880 A JP 10078880A JP S5725766 A JPS5725766 A JP S5725766A
Authority
JP
Japan
Prior art keywords
electronic
resistance
feeding circuit
parallel
emitter
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
JP10078880A
Other languages
Japanese (ja)
Other versions
JPS6230544B2 (en
Inventor
Takashi Tabu
Shuichi Ashihara
Hitoshi Shirai
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 JP10078880A priority Critical patent/JPS5725766A/en
Publication of JPS5725766A publication Critical patent/JPS5725766A/en
Publication of JPS6230544B2 publication Critical patent/JPS6230544B2/ja
Granted 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Landscapes

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

Abstract

PURPOSE:To reduce the power consumption and realize the miniaturization of an electronic feeding circuit without lowering the performance of the circuit, by connecting a resistance in parallel to the area between the collector and the emitter of the transisitors forming a feedback loop of an electronic feeding circuit of an electronic switchboard. CONSTITUTION:A feedback loop comprising transistors TR1 and TR2, resistances R1 and R2 plus an operational amplifier A is provided to call current supplying circuits BS1 and BS2 that supply the call current to a telephone TEL of an electronic switchboard. A resistance R4 is connected in parallel to the area between the emitter and the collector of the TR1 and TR2 respectively. With this parallel connection of the resistance R4 to the TR1 and TR2, these transistors can operate with a low level of elctric power to realize a reduction of power consumption. At the same time, the circuits BS1 and BS2 can be easily integrated with a miniature structure.
JP10078880A 1980-07-23 1980-07-23 Electronic feeding circuit Granted JPS5725766A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10078880A JPS5725766A (en) 1980-07-23 1980-07-23 Electronic feeding circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10078880A JPS5725766A (en) 1980-07-23 1980-07-23 Electronic feeding circuit

Publications (2)

Publication Number Publication Date
JPS5725766A true JPS5725766A (en) 1982-02-10
JPS6230544B2 JPS6230544B2 (en) 1987-07-02

Family

ID=14283177

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10078880A Granted JPS5725766A (en) 1980-07-23 1980-07-23 Electronic feeding circuit

Country Status (1)

Country Link
JP (1) JPS5725766A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0630143A1 (en) * 1993-06-16 1994-12-21 DeTeWe - Deutsche Telephonwerke Aktiengesellschaft & Co. Feeding circuit arrangement for digital telecommunication terminals

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54151307A (en) * 1978-05-19 1979-11-28 Nec Corp Supply circuit for communication current

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54151307A (en) * 1978-05-19 1979-11-28 Nec Corp Supply circuit for communication current

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0630143A1 (en) * 1993-06-16 1994-12-21 DeTeWe - Deutsche Telephonwerke Aktiengesellschaft & Co. Feeding circuit arrangement for digital telecommunication terminals

Also Published As

Publication number Publication date
JPS6230544B2 (en) 1987-07-02

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