JPS6237495U - - Google Patents

Info

Publication number
JPS6237495U
JPS6237495U JP12841785U JP12841785U JPS6237495U JP S6237495 U JPS6237495 U JP S6237495U JP 12841785 U JP12841785 U JP 12841785U JP 12841785 U JP12841785 U JP 12841785U JP S6237495 U JPS6237495 U JP S6237495U
Authority
JP
Japan
Prior art keywords
response
signal
outputs
detection circuit
detection
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
JP12841785U
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 JP12841785U priority Critical patent/JPS6237495U/ja
Publication of JPS6237495U publication Critical patent/JPS6237495U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Description

【図面の簡単な説明】
第1図はこの考案の実施例である電話回線応答
信号検出回路の構成ブロツク図、第2図は第1図
の要部信号波形図、第3図は従来の電話回線応答
信号検出回路の構成ブロツク図、第4図は第3図
の要部信号波形図である。 5……異応答検出回路、6……論理積回路。

Claims (1)

  1. 【実用新案登録請求の範囲】 電話機回線の各種応答信号の中から必要な応答
    信号を検出し応答検出信号を出力する応答信号検
    出回路を備えた電話回線応答信号検出回路におい
    て、 前記応答信号検出回路より検出される応答検出
    信号の中心周波数と異なる中心周波数を検出し異
    応答検出信号を出力する異応答検出回路と、 該異応答検出回路より出力された異応答検出信
    号と前記応答信号検出回路より出力された応答検
    出信号の論理積を算出し応答信号を出力する論理
    積回路とを備え、 外部雑音を除去し応答信号のみを出力すること
    を特徴とする電話回路応答信号検出回路。
JP12841785U 1985-08-23 1985-08-23 Pending JPS6237495U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12841785U JPS6237495U (ja) 1985-08-23 1985-08-23

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12841785U JPS6237495U (ja) 1985-08-23 1985-08-23

Publications (1)

Publication Number Publication Date
JPS6237495U true JPS6237495U (ja) 1987-03-05

Family

ID=31024065

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12841785U Pending JPS6237495U (ja) 1985-08-23 1985-08-23

Country Status (1)

Country Link
JP (1) JPS6237495U (ja)

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