JPH0137004B2 - - Google Patents

Info

Publication number
JPH0137004B2
JPH0137004B2 JP22907082A JP22907082A JPH0137004B2 JP H0137004 B2 JPH0137004 B2 JP H0137004B2 JP 22907082 A JP22907082 A JP 22907082A JP 22907082 A JP22907082 A JP 22907082A JP H0137004 B2 JPH0137004 B2 JP H0137004B2
Authority
JP
Japan
Prior art keywords
impedance
terminal
impedance element
operational amplifier
output
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
JP22907082A
Other languages
English (en)
Japanese (ja)
Other versions
JPS59122110A (ja
Inventor
Takao Hayashi
Masanobu Arai
Takashi Shinozuka
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 JP22907082A priority Critical patent/JPS59122110A/ja
Priority to US06/565,975 priority patent/US4600811A/en
Priority to CA000444391A priority patent/CA1206649A/en
Priority to EP83307997A priority patent/EP0112731B1/en
Priority to AU22978/83A priority patent/AU563506B2/en
Priority to DE8383307997T priority patent/DE3378455D1/de
Publication of JPS59122110A publication Critical patent/JPS59122110A/ja
Publication of JPH0137004B2 publication Critical patent/JPH0137004B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/005—Interface circuits for subscriber lines
    • 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)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Networks Using Active Elements (AREA)
JP22907082A 1982-12-28 1982-12-28 インピ−ダンス合成回路 Granted JPS59122110A (ja)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP22907082A JPS59122110A (ja) 1982-12-28 1982-12-28 インピ−ダンス合成回路
US06/565,975 US4600811A (en) 1982-12-28 1983-12-27 Subscriber line interface circuit
CA000444391A CA1206649A (en) 1982-12-28 1983-12-29 Subscriber line interface circuit
EP83307997A EP0112731B1 (en) 1982-12-28 1983-12-29 Subscriber line interface circuit
AU22978/83A AU563506B2 (en) 1982-12-28 1983-12-29 Subscriber line interface circuit
DE8383307997T DE3378455D1 (en) 1982-12-28 1983-12-29 Subscriber line interface circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22907082A JPS59122110A (ja) 1982-12-28 1982-12-28 インピ−ダンス合成回路

Publications (2)

Publication Number Publication Date
JPS59122110A JPS59122110A (ja) 1984-07-14
JPH0137004B2 true JPH0137004B2 (enrdf_load_stackoverflow) 1989-08-03

Family

ID=16886260

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22907082A Granted JPS59122110A (ja) 1982-12-28 1982-12-28 インピ−ダンス合成回路

Country Status (1)

Country Link
JP (1) JPS59122110A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
JPS59122110A (ja) 1984-07-14

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