JPH0312553U - - Google Patents

Info

Publication number
JPH0312553U
JPH0312553U JP3919890U JP3919890U JPH0312553U JP H0312553 U JPH0312553 U JP H0312553U JP 3919890 U JP3919890 U JP 3919890U JP 3919890 U JP3919890 U JP 3919890U JP H0312553 U JPH0312553 U JP H0312553U
Authority
JP
Japan
Prior art keywords
circuit
active element
lines
pair
polarity
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.)
Pending
Application number
JP3919890U
Other languages
English (en)
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 JP3919890U priority Critical patent/JPH0312553U/ja
Publication of JPH0312553U publication Critical patent/JPH0312553U/ja
Pending legal-status Critical Current

Links

Description

【図面の簡単な説明】
第1図は従来の転極検出回路の回路構成例を示
すブロツクを含む回路図、第2図は本考案の主要
部を示す構成図、第3図、第4図及び第5図は本
考案の実施例を示すブロツクを含む回路図である

Claims (1)

    【実用新案登録請求の範囲】
  1. 一対の線路の一方の片線の極性が予め定めたプ
    ラス又はマイナスの極性の時にセツトされる入力
    ハイインピーダンスの第1の二安定能動素子回路
    と、前記一対の線路の他方の片線の極性が予め定
    めたプラス又はマイナスの極性の時にセツトされ
    る入力ハイインピーダンスの第2の二安定能動素
    子回路と、前記第1の二安定能動素子回路と前記
    第2の二安定能動素子回路の出力の論理積をとつ
    て前記一対の線路の極性反転の検出出力とする論
    理積回路と、前記検出出力により前記第1の二安
    定能動素子回路と前記第2の二安定能動素子回路
    とをリセツトするためのリセツト手段とを前記一
    対の線路に対して形成される電話機回路の直流ル
    ープ回路の外側に備えた極性反転検知回路により
    前記一対の線路の極性反転検知を行うように構成
    された電話機。
JP3919890U 1990-04-12 1990-04-12 Pending JPH0312553U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3919890U JPH0312553U (ja) 1990-04-12 1990-04-12

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3919890U JPH0312553U (ja) 1990-04-12 1990-04-12

Publications (1)

Publication Number Publication Date
JPH0312553U true JPH0312553U (ja) 1991-02-07

Family

ID=31547893

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3919890U Pending JPH0312553U (ja) 1990-04-12 1990-04-12

Country Status (1)

Country Link
JP (1) JPH0312553U (ja)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5533515B2 (ja) * 1975-12-26 1980-09-01
JPS5642456A (en) * 1979-09-14 1981-04-20 Tamura Electric Works Ltd Automatic correcting circuit for main-wire polarity
JPS5643859A (en) * 1979-09-18 1981-04-22 Tamura Electric Works Ltd Polarity-inversion-signal detecting circuit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5533515B2 (ja) * 1975-12-26 1980-09-01
JPS5642456A (en) * 1979-09-14 1981-04-20 Tamura Electric Works Ltd Automatic correcting circuit for main-wire polarity
JPS5643859A (en) * 1979-09-18 1981-04-22 Tamura Electric Works Ltd Polarity-inversion-signal detecting circuit

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