JPS637841U - - Google Patents

Info

Publication number
JPS637841U
JPS637841U JP9984586U JP9984586U JPS637841U JP S637841 U JPS637841 U JP S637841U JP 9984586 U JP9984586 U JP 9984586U JP 9984586 U JP9984586 U JP 9984586U JP S637841 U JPS637841 U JP S637841U
Authority
JP
Japan
Prior art keywords
line
polarity
power supply
resistance value
high resistance
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
JP9984586U
Other languages
English (en)
Other versions
JPH0349494Y2 (ja
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 filed Critical
Priority to JP1986099845U priority Critical patent/JPH0349494Y2/ja
Publication of JPS637841U publication Critical patent/JPS637841U/ja
Application granted granted Critical
Publication of JPH0349494Y2 publication Critical patent/JPH0349494Y2/ja
Expired legal-status Critical Current

Links

Description

【図面の簡単な説明】
図は本考案の実施例を示す回路図である。 ２……ＤＢ（ダイオードブリツジ）、３……Ｐ
Ｓ（電源回路）、４……ＴＫＣ（通話回路）、Ｌ
１，Ｌ２……線路端子、ＺＤ……定電圧ダイオー
ド、Ｄ１〜Ｄ６……ダイオード、Ｃ１〜Ｃ４……
コンデンサ、Ｒ１〜Ｒ６……抵抗器、Ｑ１，Ｑ２
……トランジスタ、Ｖ１〜Ｖ４……電源、ＳＤ１
，ＳＤ２……検知出力。

Claims (1)

    【実用新案登録請求の範囲】
  1. 電話線路からのループ電流を一定極性とするダ
    イオードブリツジと、該ダイオードブリツジを介
    する一定極性のループ電流により充電されるコン
    デンサを有する電源回路とを備える電話機におい
    て、前記線路の一線へ高抵抗値の抵抗器を介して
    ベースが接続されると共にコレクタ・エミツタ間
    へ前記電源回路からの電源が供給されかつ前記ベ
    ースへ印加される電圧が特定極性のとき検知出力
    を生ずるトランジスタと、前記線路の一線が特定
    極性のとき順方向となる極性として前記高抵抗値
    の抵抗器に対し直列に挿入されたダイオードとを
    設けたことを特徴とする線路極性検知回路。
JP1986099845U 1986-07-01 1986-07-01 Expired JPH0349494Y2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1986099845U JPH0349494Y2 (ja) 1986-07-01 1986-07-01

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1986099845U JPH0349494Y2 (ja) 1986-07-01 1986-07-01

Publications (2)

Publication Number Publication Date
JPS637841U true JPS637841U (ja) 1988-01-19
JPH0349494Y2 JPH0349494Y2 (ja) 1991-10-22

Family

ID=30969103

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1986099845U Expired JPH0349494Y2 (ja) 1986-07-01 1986-07-01

Country Status (1)

Country Link
JP (1) JPH0349494Y2 (ja)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5551016U (ja) * 1978-09-26 1980-04-03

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5551016B2 (ja) * 1972-11-24 1980-12-22

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5551016U (ja) * 1978-09-26 1980-04-03

Also Published As

Publication number Publication date
JPH0349494Y2 (ja) 1991-10-22

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