JPH0386645U - - Google Patents
Info
- Publication number
- JPH0386645U JPH0386645U JP14803089U JP14803089U JPH0386645U JP H0386645 U JPH0386645 U JP H0386645U JP 14803089 U JP14803089 U JP 14803089U JP 14803089 U JP14803089 U JP 14803089U JP H0386645 U JPH0386645 U JP H0386645U
- Authority
- JP
- Japan
- Prior art keywords
- sub
- analog signal
- sub analog
- main digital
- digital signal
- 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 3
- 230000000087 stabilizing effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Landscapes
- Dc Digital Transmission (AREA)
- Optical Communication System (AREA)
Description
第１図は本考案の光送信器の一実施例の構成を
示すブロツク図、第２図は第１図の実施例の動作
原理を説明するための特性図、第３図は第１図の
実施例の変調度安定化回路３の動作応答を説明す
るための特性図である。
１……ＦＳＫ回路、２……副アナログ有無判定
回路、３……変調度安定化回路、４……発光素子
駆動回路、５……発光素子。
FIG. 1 is a block diagram showing the configuration of an embodiment of the optical transmitter of the present invention, FIG. 2 is a characteristic diagram for explaining the operating principle of the embodiment of FIG. 1, and FIG. FIG. 3 is a characteristic diagram for explaining the operational response of the modulation degree stabilizing circuit 3 of the embodiment. 1...FSK circuit, 2...Sub analog presence/absence determination circuit, 3...Modulation degree stabilization circuit, 4...Light emitting element drive circuit, 5...Light emitting element.
Claims (1)
し、主デイジタル信号と副アナログ信号を同時に
伝送する光送信器において、副アナログ信号の入
力の有無を検出する副アナログ有無判定回路と、
常時はゲインを最小とし前記副アナログ有無判定
回路によつて副アナログ信号の入力が確認された
とき予め設定する時定数に従つて徐徐にゲインを
所定の状態に増大し主デイジタル信号に所定の振
幅変調度を与える副アナログ信号レベルを設定し
て出力する変調度安定化回路とを備えて成ること
を特徴とする光送信器。 In an optical transmitter that amplitude modulates a main digital signal with a sub analog signal and simultaneously transmits the main digital signal and the sub analog signal, a sub analog presence/absence determination circuit detects whether or not a sub analog signal is input;
Normally, the gain is set to the minimum, and when the input of the sub analog signal is confirmed by the sub analog presence determination circuit, the gain is gradually increased to a predetermined state according to a preset time constant, and the main digital signal is given a predetermined amplitude. An optical transmitter comprising: a modulation degree stabilizing circuit that sets and outputs a sub-analog signal level that provides a modulation degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14803089U JPH0386645U (en) | 1989-12-21 | 1989-12-21 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14803089U JPH0386645U (en) | 1989-12-21 | 1989-12-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0386645U true JPH0386645U (en) | 1991-09-02 |
Family
ID=31694498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14803089U Pending JPH0386645U (en) | 1989-12-21 | 1989-12-21 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0386645U (en) |
-
1989
- 1989-12-21 JP JP14803089U patent/JPH0386645U/ja active Pending
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