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
Links
- 238000001514 detection method Methods 0.000 claims description 4
- 239000000470 constituent Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Description
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)
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.
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)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0310557A (en) * | 1989-06-08 | 1991-01-18 | Tokyo Gas Co Ltd | Network controller |
-
1986
- 1986-09-26 JP JP14640686U patent/JPS6355644U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0310557A (en) * | 1989-06-08 | 1991-01-18 | Tokyo Gas Co Ltd | Network controller |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS6388094U (en) | ||
| JPS6355644U (en) | ||
| JPH0164087U (en) | ||
| JPS609356U (en) | Ringing signal detection circuit | |
| JPH0425326U (en) | ||
| JPH03113536U (en) | ||
| JPS6437136U (en) | ||
| JPS6224538U (en) | ||
| JPS6384577U (en) | ||
| JPS63174051U (en) | ||
| JPS5972564U (en) | Thyristor failure detection device | |
| JPH033760U (en) | ||
| JPH0370023U (en) | ||
| JPH03119290U (en) | ||
| JPS62145350U (en) | ||
| JPH0339949U (en) | ||
| JPH02145445U (en) | ||
| JPS63158031U (en) | ||
| JPS62151238U (en) | ||
| JPH02138948U (en) | ||
| JPS63137877U (en) | ||
| JPS6180465U (en) | ||
| JPS5892238U (en) | Optical paper detection circuit | |
| JPH022675U (en) | ||
| JPS61195427U (en) |