JPS58181343A - Optical signal transmission circuit - Google Patents
Optical signal transmission circuitInfo
- Publication number
- JPS58181343A JPS58181343A JP57063703A JP6370382A JPS58181343A JP S58181343 A JPS58181343 A JP S58181343A JP 57063703 A JP57063703 A JP 57063703A JP 6370382 A JP6370382 A JP 6370382A JP S58181343 A JPS58181343 A JP S58181343A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- optical
- transmission circuit
- optical fiber
- optical 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は光ファイバを用いて信号を伝達する為の光信号
伝送回路に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical signal transmission circuit for transmitting signals using optical fibers.
従来、光ファイバを用いて信号を伝送する場合には、送
信側で発生される発光素子からの光を、元ファイバを介
して送信t/、受信側において受光素子によル光を電気
信号に変換していた。又、ディジタル信号の伝送の場合
Ka受信側において受光素子の出力信号を増申し、増巾
された信号を一定のスレッショルド電圧と比較してディ
ジタル信号に変換してい九。然し、光ファイバの長さK
よシ光の減衰率が変化する為受信11において受光素子
出力増巾の増巾率やスレッショルド電圧の光ファイバ長
に応じた調整が必要であった。Conventionally, when transmitting signals using optical fibers, light from a light emitting element generated on the transmitting side is transmitted via the original fiber, and the light is converted into an electrical signal by a light receiving element on the receiving side. was converting. In addition, in the case of digital signal transmission, the output signal of the light receiving element is amplified on the Ka receiving side, the amplified signal is compared with a certain threshold voltage, and converted into a digital signal.9. However, the length of the optical fiber K
Since the attenuation rate of the emitted light changes, it is necessary to adjust the amplification rate of the light receiving element output amplification and the threshold voltage in accordance with the length of the optical fiber in the receiver 11.
本発明は従来技術における上記の問題を解決するための
ものでTon、光ファイバ長の影参を受けず、スレッシ
ョルド電圧の調整も不要な光信号伝送回路を提供するこ
とを目的とする。The present invention is intended to solve the above-mentioned problems in the prior art, and an object thereof is to provide an optical signal transmission circuit that is not affected by Ton, the length of an optical fiber, and does not require adjustment of a threshold voltage.
次に本発明を!J!施例を参照しながら説明する。Next, the invention! J! This will be explained with reference to examples.
xi図は本発明に係る光信号伝送回路の第1の実施例を
示し、第1図の(a)は光ファイバと送信側の発光素子
としての発光ダイオードLED及び受信側の受光素子と
してのフォトダイミードとの接続関係を示し、1は赤、
緑の各色の発光ダイオードを同一パッケージに収めた発
光ダイオードパッケージであり、3.4は受光用フォト
ダイオ−Yで夫々赤色フィルタ3&及び緑色フィルタ4
bを前面にとシフけている。第1図の(b)a光信号伝
送回路における送信回路及び受信回路の構成を示し、送
信回路において端子20から与えられる送信されるべき
信号は非反転増巾器21と反転増巾622によシ互いに
逆位相の信号にされ、これらの各増巾器の出力に接続さ
れた赤色LED 1a、緑色LEDI bは端子2Gに
入力される信号の符号が正逆と変化するに応じて交互に
点灯され各LEDの発光による光信号が光ファイバ2を
介して受信回路に送信される。受信回路で拡充ファイバ
2からの光線赤色フィルタ3a、緑色フィルタ4bには
フォトダイオード3.4によシ夫々受光される。FIG. xi shows a first embodiment of the optical signal transmission circuit according to the present invention, and FIG. Indicates the connection relationship with Dymede, 1 is red,
This is a light emitting diode package in which light emitting diodes of each color of green are housed in the same package, and 3.4 is a photodiode Y for receiving light, with a red filter 3 & a green filter 4 respectively.
B is shifted to the front. FIG. 1(b)a shows the configuration of the transmitting circuit and the receiving circuit in the optical signal transmission circuit. The red LED 1a and green LED I b connected to the output of each amplifier are turned on alternately as the sign of the signal input to terminal 2G changes from positive to negative. The optical signal generated by the light emission of each LED is transmitted to the receiving circuit via the optical fiber 2. In the receiving circuit, the light from the expansion fiber 2 is received by a red filter 3a and a green filter 4b by photodiodes 3.4, respectively.
受光に応じてフォトダイオード3.4から出力される各
信号は夫々増巾器5.6で増巾され、増巾器7、抵抗[
9,10,11で構成される差動アンプで受信々号に変
換され、受信々号は端子12から出力宴れる。このよう
に光ファイバ長が変化しても赤色光、緑色光の減衰率は
共に同じであシ、光フアイバ長変化による増巾器5,6
の出力振巾の変化も同じになる為差動増巾器では正確に
元の信号を復元できる。即ち、無調整化が実現できる。Each signal outputted from the photodiode 3.4 in response to light reception is amplified by an amplifier 5.6, and the amplifier 7 and the resistor [
The received signal is converted into a received signal by a differential amplifier composed of 9, 10, and 11, and the received signal is outputted from a terminal 12. In this way, even if the optical fiber length changes, the attenuation rate of red light and green light is the same.
Since the output amplitude changes are also the same, the differential amplifier can accurately restore the original signal. In other words, no adjustment can be achieved.
又、減衰率の大きなプラスチック・ファイバを使用する
場合には本発明は極めて大きな効果をもたらす。Further, when using plastic fibers with a large attenuation factor, the present invention brings about a very large effect.
本発明の第2の実施例を第2図に示す。第2図は、ビル
用の空調設備に本発明を適用した例である。第2図にお
いて31は室内に設置された空調設備のコントローラ、
32は光ファイバ、33は空調機の室内ユニット、34
はダクト、35は室外機であp11信号回路の送信回路
をコントロー231に設置し受信回路を室内ユニット3
3に設置し、コントロー231からの制御信号を送信回
路によ9光信号に変換して光ファイバ32を介して室内
ユニット33に送シ、室内ユニット33では受信した光
信号から原制御信号を再生して空調制御を行う。通常第
2図に示すような空調設備では、鶏物の大きさ構造によ
9室内機とコントローラの間の距離が大きく変動する。A second embodiment of the invention is shown in FIG. FIG. 2 shows an example in which the present invention is applied to air conditioning equipment for a building. In FIG. 2, 31 is a controller for air conditioning equipment installed indoors;
32 is an optical fiber, 33 is an air conditioner indoor unit, 34
is the duct, 35 is the outdoor unit, the transmitting circuit of the p11 signal circuit is installed in the controller 231, and the receiving circuit is installed in the indoor unit 3.
The controller 231 converts the control signal from the controller 231 into an optical signal by the transmitting circuit and sends it to the indoor unit 33 via the optical fiber 32.The indoor unit 33 regenerates the original control signal from the received optical signal. to control the air conditioning. Normally, in an air conditioning system as shown in FIG. 2, the distance between the indoor unit and the controller varies greatly depending on the size and structure of the chicken.
仁の様表配線距離が一定とならない設備においては、距
離によ如データ転送の送受信レベルの調整を行うことが
面倒となる。又、制御信号に雑音が重畳されることを防
ぐためコントローラ31と室内ユニット330間の配線
が他の動力線と平行に配線されるのを防ぐ必要がある。In equipment where the actual wiring distance is not constant, it becomes troublesome to adjust the transmission and reception level of data transfer depending on the distance. Furthermore, in order to prevent noise from being superimposed on the control signal, it is necessary to prevent the wiring between the controller 31 and the indoor unit 330 from being wired in parallel with other power lines.
この様な場合に、本発明による光伝送信号回路を使用す
れば配線長による調整紘不要であシ、かつ制御信号は光
信号なので電磁誘導による障害を受けること杜なく制御
用の線(光ファイバ)を動力線に平行に配線しても問題
が表く、設置工事の簡略化を図ることができる。又、低
コストな光ファイバとしてプラスチックファイバがあシ
、その透光率は第6図に示す様にガラスファイバに比し
て相当悪いが、本発明による光信号伝送回路管使用すれ
は光の減衰率が大きくても原信号な正確に再生できるの
で問題なく、極めて安価に信号伝送ができる。In such cases, if the optical transmission signal circuit according to the present invention is used, there is no need to adjust the wiring length, and since the control signal is an optical signal, the control line (optical fiber) can be used without interference due to electromagnetic induction. ), which poses a problem even if wired parallel to the power line, the installation work can be simplified. In addition, plastic fiber is used as a low-cost optical fiber, and its light transmittance is considerably lower than that of glass fiber, as shown in Figure 6, but the use of the optical signal transmission circuit tube according to the present invention reduces the attenuation of light. Even if the rate is large, the original signal can be reproduced accurately, so there is no problem, and signal transmission can be performed at extremely low cost.
以上に述べた如く本発明によれば、光ファイバを用いた
光信号伝送において光の減衰率の大小にか\わらず受信
側で原信号を正確に再生することができ、光ファイバ長
に応じたレベル調整は不要であ多、安価なシラスナック
製ファイバをその光透過率の悪さを考慮することなく使
用することができ、安価な光信号伝送回路を構成し得る
。本発明な自動車内の信号伝送に応用することも可能で
おる。As described above, according to the present invention, the original signal can be accurately reproduced on the receiving side regardless of the magnitude of the optical attenuation rate in optical signal transmission using an optical fiber, and the There is no need for level adjustment, and an inexpensive Silasnac fiber can be used without considering its poor light transmittance, making it possible to construct an inexpensive optical signal transmission circuit. The present invention can also be applied to signal transmission within an automobile.
第1図は本発明に係る光信号伝送回路の一実施例の構成
を示す構成図、第2図は本発明に係る光信号伝送回路の
他の実施例を示す構成図、第6図はプラスチックファイ
バの特性図である。
1・・・発光ダイオードパッケージ、la*1b・・・
発光ダイオード、2.32−・・光ファイバ、3,4・
・・フォトダイオード、3a+4b・・・フィルタ、5
゜6.7・・・増巾器、21・・・非反転増巾器、22
・・・反転増巾器、31・・・コントローラ、33・・
・室内ユニット、34・・・ダクト、35・・・室外機
。
代理人 桟材 皓
外4名FIG. 1 is a block diagram showing the configuration of one embodiment of the optical signal transmission circuit according to the present invention, FIG. 2 is a block diagram showing another embodiment of the optical signal transmission circuit according to the present invention, and FIG. It is a characteristic diagram of a fiber. 1...Light emitting diode package, la*1b...
Light emitting diode, 2.32-...Optical fiber, 3,4-
...Photodiode, 3a+4b...Filter, 5
゜6.7... Amplifier, 21... Non-inverting amplifier, 22
...Reversing amplifier, 31... Controller, 33...
- Indoor unit, 34... duct, 35... outdoor unit. Agent: 4 people from Kogai
Claims (1)
信号伝送回路であって、送信回路において、伝送するべ
き信号の符号及びその逆符号を夫々異った色の光留号に
変換し皺光信号を光ファイバを介して送信し、受信回路
において、光ファイバを介して受信され丸前記光信号を
色の異なる各党信号毎に別々に電気信号に変換し、変換
され丸缶電気信号を差動増巾器に入力として与え、皺差
動増巾器の出力を再生された原信号とする光伝送回路。 (2、特許請求の範囲j11項に記載の光信号伝送回路
であって、前記送信回路にかいて、夫々発光色の興った
発光ダイオードを用いて信号の符号及びその逆符号を夫
々異った色の光信号に変換する光伝送回路。 (3)特許請求の範囲第1項に記載の光信号伝送回路で
あつ゛て、前記受信回路において、光ファイバを介して
受信された光信号をフィルタによシ夫々色の異なる光信
号に分離する光伝送回路。[Scope of Claims] (1) A rounded optical signal transmission circuit that transmits signals using optical fibers, in which the transmission circuit uses light of different colors to indicate the sign and the opposite sign of the signal to be transmitted. The wrinkled optical signal is converted into a station code and transmitted via an optical fiber, and in a receiving circuit, the optical signal received via the optical fiber is converted into an electric signal for each party signal of a different color. An optical transmission circuit in which a round can electric signal is input to a differential amplifier, and the output of the wrinkled differential amplifier is the regenerated original signal. (2. The optical signal transmission circuit according to claim j11, in which the transmitting circuit uses light emitting diodes each emitting a different color so that the sign and the opposite sign of the signal are different from each other. (3) An optical signal transmission circuit according to claim 1, wherein the receiving circuit converts an optical signal received via an optical fiber into an optical signal of a different color. An optical transmission circuit that uses filters to separate optical signals into different colors.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57063703A JPS58181343A (en) | 1982-04-16 | 1982-04-16 | Optical signal transmission circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57063703A JPS58181343A (en) | 1982-04-16 | 1982-04-16 | Optical signal transmission circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS58181343A true JPS58181343A (en) | 1983-10-24 |
Family
ID=13236993
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP57063703A Pending JPS58181343A (en) | 1982-04-16 | 1982-04-16 | Optical signal transmission circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS58181343A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04223628A (en) * | 1990-03-26 | 1992-08-13 | American Teleph & Telegr Co <Att> | Data link array utilizing differential transmission |
JPH0575539A (en) * | 1991-09-11 | 1993-03-26 | Kyosan Electric Mfg Co Ltd | Optical transmitting device |
JPH05122159A (en) * | 1991-05-13 | 1993-05-18 | Internatl Business Mach Corp <Ibm> | Method of improving ratio of signal to noise of transmission signal and optical interconnection system |
JPH05206952A (en) * | 1991-08-15 | 1993-08-13 | General Instr Corp | Low-distortion laser system for amplitude- modulated optical fiber communication use |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57154954A (en) * | 1981-03-19 | 1982-09-24 | Nec Corp | Transmitting system of optical data |
-
1982
- 1982-04-16 JP JP57063703A patent/JPS58181343A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57154954A (en) * | 1981-03-19 | 1982-09-24 | Nec Corp | Transmitting system of optical data |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04223628A (en) * | 1990-03-26 | 1992-08-13 | American Teleph & Telegr Co <Att> | Data link array utilizing differential transmission |
JPH05122159A (en) * | 1991-05-13 | 1993-05-18 | Internatl Business Mach Corp <Ibm> | Method of improving ratio of signal to noise of transmission signal and optical interconnection system |
JPH05206952A (en) * | 1991-08-15 | 1993-08-13 | General Instr Corp | Low-distortion laser system for amplitude- modulated optical fiber communication use |
JPH0575539A (en) * | 1991-09-11 | 1993-03-26 | Kyosan Electric Mfg Co Ltd | Optical transmitting device |
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