JPS6355644U - - Google Patents

Info

Publication number
JPS6355644U
JPS6355644U JP14640686U JP14640686U JPS6355644U JP S6355644 U JPS6355644 U JP S6355644U JP 14640686 U JP14640686 U JP 14640686U JP 14640686 U JP14640686 U JP 14640686U JP S6355644 U JPS6355644 U JP S6355644U
Authority
JP
Japan
Prior art keywords
polarity
photodiode
subscriber line
detection circuit
circuit
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
JP14640686U
Other languages
Japanese (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 JP14640686U priority Critical patent/JPS6355644U/ja
Publication of JPS6355644U publication Critical patent/JPS6355644U/ja
Pending legal-status Critical Current

Links

Description

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

第１図は、本考案の一実施例を示す回線図、第
２図は、従来の極性検出回路を示す回路図である
。 １，３…ブリツジ形成用ダイオード、２２，２
４…極性検出用フオトカツプラ、１５，１６…プ
ルアツプ抵抗、７…電話回路網、Ｌ１，Ｌ２…線
路。 FIG. 1 is a circuit diagram showing an embodiment of the present invention, and FIG. 2 is a circuit diagram showing a conventional polarity detection circuit. 1, 3... Bridge forming diode, 22, 2
4...Photo coupler for polarity detection, 15, 16...Pull-up resistor, 7...Telephone circuit network, L1, L2...Line.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 極性反転のなされる加入者回線に接続され、極
性状態にかかわらず正の電圧を供給するよう構成
されたダイオードブリツジ回路を備えた電話機回
路に用いられる極性検出回路において、前記ダイ
オードブリツジ回路を構成するダイオードをフオ
トダイオードとし、このフオトダイオードと光学
的結合をなすフオトトランジスタの出力に基づき
前記加入者回線の極性を検出する手段を備えたこ
とを特徴とする極性検出回路。 In a polarity detection circuit used in a telephone circuit, which is connected to a subscriber line whose polarity is inverted and is configured to supply a positive voltage regardless of the polarity state, the diode bridge circuit is A polarity detection circuit comprising a photodiode as a constituent diode, and comprising means for detecting the polarity of the subscriber line based on the output of a phototransistor optically coupled to the photodiode.
JP14640686U 1986-09-26 1986-09-26 Pending JPS6355644U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14640686U JPS6355644U (en) 1986-09-26 1986-09-26

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14640686U JPS6355644U (en) 1986-09-26 1986-09-26

Publications (1)

Publication Number Publication Date
JPS6355644U true JPS6355644U (en) 1988-04-14

Family

ID=31058844

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14640686U Pending JPS6355644U (en) 1986-09-26 1986-09-26

Country Status (1)

Country Link
JP (1) JPS6355644U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0310557A (en) * 1989-06-08 1991-01-18 Tokyo Gas Co Ltd Network controller

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0310557A (en) * 1989-06-08 1991-01-18 Tokyo Gas Co Ltd Network controller

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