JPS59121961U - Line interface circuit - Google Patents

Line interface circuit

Info

Publication number
JPS59121961U
JPS59121961U JP1489683U JP1489683U JPS59121961U JP S59121961 U JPS59121961 U JP S59121961U JP 1489683 U JP1489683 U JP 1489683U JP 1489683 U JP1489683 U JP 1489683U JP S59121961 U JPS59121961 U JP S59121961U
Authority
JP
Japan
Prior art keywords
circuit
interface circuit
line interface
telephone
current
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
JP1489683U
Other languages
Japanese (ja)
Other versions
JPH0332131Y2 (en
Inventor
和彦 山森
眞次 西村
隆 佐伯
堀内　猛志
Original Assignee
日本電信電話株式会社
株式会社東芝
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 日本電信電話株式会社, 株式会社東芝 filed Critical 日本電信電話株式会社
Priority to JP1489683U priority Critical patent/JPS59121961U/en
Publication of JPS59121961U publication Critical patent/JPS59121961U/en
Application granted granted Critical
Publication of JPH0332131Y2 publication Critical patent/JPH0332131Y2/ja
Granted legal-status Critical Current

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Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of drawings]

、　　第１図は従来における線路インタフェース回路の
回路構成図、第２図は回路の直流特性を説明するための
図、第３図は本考案の一実施例における線路インタフェ
ース回路の回路構成図である。 １ａ、　　１ｂ・・・加入者線端子（線路端子）、２・
・・トランス、３・・・電話機、４・・・ダイオードブ
リッジ回路、１０・・・交流接続回路、１１・・・分流
回路、１２・・・トランジスタ、１３・・・エミッタ抵
抗、１４・・・電圧発生回路。−, FIG. 1 is a circuit configuration diagram of a conventional line interface circuit, FIG. 2 is a diagram for explaining the DC characteristics of the circuit, and FIG. 3 is a circuit configuration diagram of a line interface circuit in an embodiment of the present invention. . 1a, 1b... subscriber line terminal (line terminal), 2.
...Transformer, 3...Telephone, 4...Diode bridge circuit, 10...AC connection circuit, 11...Shunt circuit, 12...Transistor, 13...Emitter resistor, 14... Voltage generation circuit. −

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 平衡２線線路の線路電流を整流する整流回路と、この整
流回路の出力端に対しトランスを介して電話機を交流的
に接続する交流接続回路と、この交流接続回路に対し並
列に設けられ前記整流回路の整流出力の主電流を分流す
るトランジスタ分流回路と、このトランジスタ分流回路
の制御入力端および前記整流回路への電流流出端間に設
けられ前記電話機の駆動電圧を発生する電圧発生回路と
を具備したことを特徴とする線路インタフェース回路。a rectifier circuit that rectifies the line current of a balanced two-wire line; an AC connection circuit that AC connects a telephone to the output end of the rectifier circuit via a transformer; A transistor shunt circuit that shunts the main current of the rectified output of the circuit, and a voltage generation circuit that is provided between a control input terminal of the transistor shunt circuit and a current outflow terminal to the rectifier circuit and generates a driving voltage for the telephone. A track interface circuit characterized by:
JP1489683U 1983-02-03 1983-02-03 Line interface circuit Granted JPS59121961U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1489683U JPS59121961U (en) 1983-02-03 1983-02-03 Line interface circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1489683U JPS59121961U (en) 1983-02-03 1983-02-03 Line interface circuit

Publications (2)

Publication Number Publication Date
JPS59121961U true JPS59121961U (en) 1984-08-16
JPH0332131Y2 JPH0332131Y2 (en) 1991-07-08

Family

ID=30146237

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1489683U Granted JPS59121961U (en) 1983-02-03 1983-02-03 Line interface circuit

Country Status (1)

Country Link
JP (1) JPS59121961U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62125042U (en) * 1986-01-30 1987-08-08

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57158250U (en) * 1981-03-30 1982-10-05
JPS57195269U (en) * 1981-06-03 1982-12-10

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57158250U (en) * 1981-03-30 1982-10-05
JPS57195269U (en) * 1981-06-03 1982-12-10

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62125042U (en) * 1986-01-30 1987-08-08

Also Published As

Publication number Publication date
JPH0332131Y2 (en) 1991-07-08

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