JPS632187B2 - - Google Patents

Info

Publication number
JPS632187B2
JPS632187B2 JP55151754A JP15175480A JPS632187B2 JP S632187 B2 JPS632187 B2 JP S632187B2 JP 55151754 A JP55151754 A JP 55151754A JP 15175480 A JP15175480 A JP 15175480A JP S632187 B2 JPS632187 B2 JP S632187B2
Authority
JP
Japan
Prior art keywords
terminal
power supply
resistor
circuit
transistor
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.)
Expired
Application number
JP55151754A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5775060A (en
Inventor
Masahiko Oono
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
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 Nippon Electric Co Ltd filed Critical Nippon Electric Co Ltd
Priority to JP15175480A priority Critical patent/JPS5775060A/ja
Publication of JPS5775060A publication Critical patent/JPS5775060A/ja
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)
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 JPS5775060A (en) 1982-05-11
JPS632187B2 true JPS632187B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 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 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4087647A (en) * 1977-05-25 1978-05-02 Bell Telephone Laboratories, Incorporated Circuit for supplying direct current to telephone station sets

Also Published As

Publication number Publication date
JPS5775060A (en) 1982-05-11

Similar Documents

Publication Publication Date Title
US5822426A (en) Balanced hybrid circuit
GB1389560A (en) Active two-wire to four-wire coupling circuit
JP2898165B2 (ja) ハイブリッド回路
JPS6411164B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JPH077890B2 (ja) ３端子演算増幅器
JPS632187B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JPS59135961A (ja) 電話機用送話信号抑制回路
US4302636A (en) Subscriber's electronic line equipment comprising a two-wire-four-wire conversion circuit for a telephone exchange
US3974344A (en) Electronic speech circuit for a central battery telephone set
JPS6115648Y2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JPH0736196B2 (ja) 複素数加重係数を有する加算増幅器およびそのような加算増幅器を備えたインターフェイス
JPS5846111B2 (ja) 通話電流供給回路
JPS5941627B2 (ja) 加入者線インタ−フエイス回路
KR0140414B1 (ko) 전화기 핸드셋의 송화접속회로
JP2687656B2 (ja) 加入者線回路
GB1216495A (en) Electrical impedance networks
JPS6196895A (ja) 通話電流監視回路
JPS645367Y2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JPH0456450A (ja) 増幅回路
JPH03231520A (ja) ２線４線変換回路
JP3031518B2 (ja) 側音回路
JP2564000B2 (ja) 給電回路
JPS6230544B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JPH02238726A (ja) ２線４線変換回路
JPS6032496A (ja) ハイブリツド回路