JPH0466835U - - Google Patents
Info
- Publication number
- JPH0466835U JPH0466835U JP10850790U JP10850790U JPH0466835U JP H0466835 U JPH0466835 U JP H0466835U JP 10850790 U JP10850790 U JP 10850790U JP 10850790 U JP10850790 U JP 10850790U JP H0466835 U JPH0466835 U JP H0466835U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- optical
- outputs
- output
- 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
- 230000003287 optical effect Effects 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Arrangements For Transmission Of Measured Signals (AREA)
- Optical Communication System (AREA)
Description
第１図は本考案の一実施例のブロツク図、第２
図は従来の光ケーブル通信装置の一例のブロツク
図である。
１……ＣＭＩ符号変換回路（ＣＭＩＣＯＤ）、
２……選択回路（ＳＥＬ）、３……駆動回路（Ｄ
ＲＶ）、４……レーザーダイオード（ＬＤ）、５
……信号断検出回路（ＤＥＴ１）、６……バイア
ス電流制御回路（ＢＩＡＳＣＯＮＴ）、７……光
出力電力制御回路（ＡＰＣ）、８……光出力信号
レベル検出回路（ＤＥＴ２）。
Fig. 1 is a block diagram of an embodiment of the present invention;
The figure is a block diagram of an example of a conventional optical cable communication device. 1...CMI code conversion circuit (CMICOD),
2... Selection circuit (SEL), 3... Drive circuit (D
RV), 4... Laser diode (LD), 5
... Signal disconnection detection circuit (DET1), 6 ... Bias current control circuit (BIASCONT), 7 ... Optical output power control circuit (APC), 8 ... Optical output signal level detection circuit (DET2).
Claims (1)
するＣＭＩ符号変換回路と、制御信号により前記
ＮＲＺ信号またはＣＭＩ信号を選択し出力する選
択回路と、この選択回路からの信号でレーザーダ
イオードに光信号を出力させる駆動回路と、前記
選択回路からの信号が断のとき断信号を出力する
信号断検出回路と、前記光信号の光出力に応じた
監視信号を出力する光出力電力制御回路と、前記
断信号と前記監視信号とに応じたバイアス電流を
前記レーザーダイオードに供給するバイアス電流
制御回路とを有することを特徴とする光ケーブル
通信装置。 ２ 前記光信号の出力があらかじめ設定された基
準値より低下したとき警報信号を出力する光出力
信号レベル検出回路を有することを特徴とする請
求項１記載の光ケーブル通信装置。[Claims for Utility Model Registration] 1. A CMI code conversion circuit that converts an input NRZ signal into a CMI signal and outputs it, a selection circuit that selects and outputs the NRZ signal or CMI signal based on a control signal, and a a drive circuit that causes the laser diode to output an optical signal in response to a signal; a signal disconnection detection circuit that outputs a disconnection signal when the signal from the selection circuit is disconnected; and a light output circuit that outputs a monitoring signal in accordance with the optical output of the optical signal. An optical cable communication device comprising: an output power control circuit; and a bias current control circuit that supplies a bias current to the laser diode according to the disconnection signal and the monitoring signal. 2. The optical cable communication device according to claim 1, further comprising an optical output signal level detection circuit that outputs an alarm signal when the output of the optical signal falls below a preset reference value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10850790U JPH0466835U (en) | 1990-10-17 | 1990-10-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10850790U JPH0466835U (en) | 1990-10-17 | 1990-10-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0466835U true JPH0466835U (en) | 1992-06-12 |
Family
ID=31855538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10850790U Pending JPH0466835U (en) | 1990-10-17 | 1990-10-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0466835U (en) |
-
1990
- 1990-10-17 JP JP10850790U patent/JPH0466835U/ja active Pending
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