JPS5775060A - Current supply circuit having power source noise eliminating circuit - Google Patents

Current supply circuit having power source noise eliminating circuit

Info

Publication number
JPS5775060A
JPS5775060A JP15175480A JP15175480A JPS5775060A JP S5775060 A JPS5775060 A JP S5775060A JP 15175480 A JP15175480 A JP 15175480A JP 15175480 A JP15175480 A JP 15175480A JP S5775060 A JPS5775060 A JP S5775060A
Authority
JP
Japan
Prior art keywords
power source
source noise
current supply
terminal
circuit
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
JP15175480A
Other languages
Japanese (ja)
Other versions
JPS632187B2 (en
Inventor
Masahiko Ono
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP15175480A priority Critical patent/JPS5775060A/en
Publication of JPS5775060A publication Critical patent/JPS5775060A/en
Publication of JPS632187B2 publication Critical patent/JPS632187B2/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 prevent a power source noise from being amplified by a current supplying transistor and transmitted to a telephone line, by providing a power source noise eliminating circuit in a current supply circuit using a transistor. CONSTITUTION:Inversion amplifiers 22 and 23 are connected to an ordinary current supply circuit through impedances 18-21. The DC stop function is given to impedances 18-21 to prevent the influence of inversion amplifiers 22 and 23 upon the current supply function. When a power source noise is superposed in a negative power source terminal 4, a voltage having a polarity opposite to that of the power source noise apears in the output terminal of the inversion amplifier 23, and the power source noise current flowed from the negative power source terminal 4, a resistance 12, a resistance 15, the impedance 21, and the output terminal of the inversion amplifier 23. The same operation is performed in respect to the side of a positive power source terminal 3. Consequently, the power source noise current as a leakage flowed to a terminal is reduced sufficiently.
JP15175480A 1980-10-28 1980-10-28 Current supply circuit having power source noise eliminating circuit Granted JPS5775060A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15175480A JPS5775060A (en) 1980-10-28 1980-10-28 Current supply circuit having power source noise eliminating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15175480A JPS5775060A (en) 1980-10-28 1980-10-28 Current supply circuit having power source noise eliminating circuit

Publications (2)

Publication Number Publication Date
JPS5775060A true JPS5775060A (en) 1982-05-11
JPS632187B2 JPS632187B2 (en) 1988-01-18

Family

ID=15525557

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15175480A Granted JPS5775060A (en) 1980-10-28 1980-10-28 Current supply circuit having power source noise eliminating circuit

Country Status (1)

Country Link
JP (1) JPS5775060A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5431204A (en) * 1977-05-25 1979-03-08 Western Electric Co Power supply system for local telephone line circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5431204A (en) * 1977-05-25 1979-03-08 Western Electric Co Power supply system for local telephone line circuit

Also Published As

Publication number Publication date
JPS632187B2 (en) 1988-01-18

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