JPS60136564U - Polarity reversal detection circuit - Google Patents
Polarity reversal detection circuitInfo
- Publication number
- JPS60136564U JPS60136564U JP2352184U JP2352184U JPS60136564U JP S60136564 U JPS60136564 U JP S60136564U JP 2352184 U JP2352184 U JP 2352184U JP 2352184 U JP2352184 U JP 2352184U JP S60136564 U JPS60136564 U JP S60136564U
- Authority
- JP
- Japan
- Prior art keywords
- polarity reversal
- detection circuit
- reversal detection
- polarity
- telephone line
- 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
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来の極性反転検出回路を示す回路図、第２図
は本考案の実施例を示す回路図、第３図は極性反転の状
態を示す要因である。
１・・・回線、２・・・極性反転出力判定回路、Ｔ・・
・ライントランス、ＲＬ・・・リレー、３，４，８，９
゜１３・・・固定抵抗、５，１０，１１・・・コンデン
サ、１．２，６，７，１２・・・ダイオード、ｐｃｌ、
ｐｃ２・・・ホトカプラ、ＩＣ１，ＩＣ２・・・バッフ
ァ、ｒｌ。
ｃｍｌ・・・リレー接点。FIG. 1 is a circuit diagram showing a conventional polarity reversal detection circuit, FIG. 2 is a circuit diagram showing an embodiment of the present invention, and FIG. 3 is a factor showing the state of polarity reversal. 1...Line, 2...Polarity inversion output determination circuit, T...
・Line transformer, RL...relay, 3, 4, 8, 9
゜13... Fixed resistance, 5, 10, 11... Capacitor, 1.2, 6, 7, 12... Diode, PCL,
pc2...photocoupler, IC1, IC2...buffer, rl. cml...Relay contact.
Claims (1)
順方向および逆方向の極性をそれぞれ個別に検出し極性
反転時に出力を反転する極性反転回路と、前記極性反転
回路の出力極性に基づいて電話回線の極性反転検出と回
線断の判定を行う極性反転出力判定回路とを含む極性反
転検出回路。A telephone line polarity reversal detection circuit includes a polarity reversal circuit that separately detects the forward and reverse polarities of the telephone line and inverts the output when the polarity is reversed, and a A polarity reversal detection circuit including a polarity reversal output determination circuit that detects polarity reversal of a telephone line and determines whether the line is disconnected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2352184U JPS60136564U (en) | 1984-02-21 | 1984-02-21 | Polarity reversal detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2352184U JPS60136564U (en) | 1984-02-21 | 1984-02-21 | Polarity reversal detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60136564U true JPS60136564U (en) | 1985-09-10 |
Family
ID=30516828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2352184U Pending JPS60136564U (en) | 1984-02-21 | 1984-02-21 | Polarity reversal detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60136564U (en) |
-
1984
- 1984-02-21 JP JP2352184U patent/JPS60136564U/en active Pending
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