JPS62147939U - - Google Patents
Info
- Publication number
- JPS62147939U JPS62147939U JP3564586U JP3564586U JPS62147939U JP S62147939 U JPS62147939 U JP S62147939U JP 3564586 U JP3564586 U JP 3564586U JP 3564586 U JP3564586 U JP 3564586U JP S62147939 U JPS62147939 U JP S62147939U
- Authority
- JP
- Japan
- Prior art keywords
- constant current
- signal line
- switch
- circuit
- current 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 6
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Description
第１図は本考案の一実施例を示す定電流給電回
路図、第２図は第１図のタイムチヤート、第３図
は従来の定電流給電回路図、第４図は第３図のタ
イムチヤートである。
１，２：電源、３，１４：定電流回路、４，１
５：継電器（不通検出手段）、８：継電器、９：
ワンパルス発生回路、１０：継電器（以上８，９
，１０は再給電回路）、ｒｌ１−１：接点（第１
のスイツチ）、ｒｌ１−１：接点（第２のスイツ
チ）。
Figure 1 is a constant current power supply circuit diagram showing an embodiment of the present invention, Figure 2 is a time chart of Figure 1, Figure 3 is a conventional constant current power supply circuit diagram, and Figure 4 is a time chart of Figure 3. It's a chat. 1, 2: Power supply, 3, 14: Constant current circuit, 4, 1
5: Relay (disconnection detection means), 8: Relay, 9:
One pulse generation circuit, 10: Relay (above 8, 9
, 10 is a refeeding circuit), rl 1-1 : contact (first
switch), rl 1-1 : contact (second switch).
Claims (1)
信号線の不通を検出する不通検出手段と、前記定
電流回路に電力を供給する電源と、この電源と前
記定電流回路との間に介挿され、前記不通検出手
段の検出結果に基づき前記信号線が不通になつた
ときに、オフとなり、前記定電流回路に供給され
る電力を遮断する第１のスイツチとを具備してな
るケーブルＰＣＭ中継器定電流給電回路において
、前記第１のスイツチに並列に接続された第２の
スイツチと、前記不通検出手段の検出結果に基づ
き、前記信号線が不通になつたときに、不通にな
つた後、所定時間前記第２のスイツチをオンとす
る再給電回路とを具備することを特徴とするケー
ブルＰＣＭ中継器定電流給電回路。 A constant current circuit that supplies a constant current to a signal line, a disconnection detection means that detects disconnection of the signal line, a power source that supplies power to the constant current circuit, and an intervening device between this power source and the constant current circuit. and a first switch that turns off and cuts off power supplied to the constant current circuit when the signal line is disconnected based on the detection result of the disconnection detection means. In the repeater constant current power supply circuit, a second switch connected in parallel to the first switch and a detection result of the disconnection detection means determine whether the signal line is disconnected when the signal line is disconnected. and a repowering circuit that turns on the second switch for a predetermined period of time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3564586U JPS62147939U (en) | 1986-03-12 | 1986-03-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3564586U JPS62147939U (en) | 1986-03-12 | 1986-03-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62147939U true JPS62147939U (en) | 1987-09-18 |
Family
ID=30845315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3564586U Pending JPS62147939U (en) | 1986-03-12 | 1986-03-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62147939U (en) |
-
1986
- 1986-03-12 JP JP3564586U patent/JPS62147939U/ja active Pending