JPH0284829A - Optical communication equipment - Google Patents
Optical communication equipmentInfo
- Publication number
- JPH0284829A JPH0284829A JP62229640A JP22964087A JPH0284829A JP H0284829 A JPH0284829 A JP H0284829A JP 62229640 A JP62229640 A JP 62229640A JP 22964087 A JP22964087 A JP 22964087A JP H0284829 A JPH0284829 A JP H0284829A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- signal
- optical
- power source
- optical communication
- 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.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 54
- 238000004891 communication Methods 0.000 title claims abstract description 45
- 238000006243 chemical reaction Methods 0.000 claims abstract description 36
- 239000003990 capacitor Substances 0.000 abstract description 6
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 238000009499 grossing Methods 0.000 abstract description 3
- 230000000087 stabilizing effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 14
- 238000010586 diagram Methods 0.000 description 7
- 239000013307 optical fiber Substances 0.000 description 5
- 230000008054 signal transmission Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 241000053208 Porcellio laevis Species 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Landscapes
- Dc Digital Transmission (AREA)
- Optical Communication System (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、光信号伝送に使用される光通信機器に関する
もので、特にコンピュータと端末装置等電子装置相互間
或はこれら電子装置内部の光信号伝送に有用な光通信機
器に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to optical communication equipment used for optical signal transmission. This invention relates to optical communication equipment useful for signal transmission.
光通信は、これまでの金属導体ケーブルを主体とした電
気通信方式に代って特定回線網通信や公衆５１８ＩＩＡ
ｗ４通信の分野において広く採用されてきており、最近
では更に情報量の比較的少ない個別電子装置相互間の情
報伝送分野、例えばコンピュータと自動制御装置、ＬＡ
Ｎノードと端末装置！或はホストコンピュータと端末コ
ンピュータ等の電子装置相互間の通信、或はまたこれら
電子装置内部の信号伝送手段として利用が図られつつあ
る。しかし、このようなｉｌｌｔＭ！相五Ｉｔｌ１％に
は装置内部の信号伝送に光通信を採用する場合、光通信
機器即ち光通信機器を構成する発光素子、電気−光変換
回路。Optical communication has replaced the conventional telecommunication system based on metal conductor cables with specific line network communication and public 518IIA.
It has been widely adopted in the field of W4 communication, and recently it has also been used in the field of information transmission between individual electronic devices with a relatively small amount of information, such as computers and automatic control devices, LA
N nodes and terminal devices! Alternatively, it is being used for communication between electronic devices such as a host computer and a terminal computer, or as a signal transmission means within these electronic devices. But illtM like this! Phase 5 Itl 1% includes light emitting elements and electrical-to-optical conversion circuits that constitute optical communication equipment, that is, optical communication equipment when optical communication is adopted for signal transmission inside the device.
光−電気変換回路、受光素子等を駆動させるための電力
源を別途設けろことが必要であって、この点がこれまで
の電気通信方式に比ベスペース、コストの而で不利な条
件となっていた。かかる光通信機器の従来例を第４ 図
に沿い説明する。It is necessary to separately provide a power source to drive the optical-to-electrical conversion circuit, light-receiving element, etc., and this point is disadvantageous in terms of space and cost compared to conventional telecommunication systems. . A conventional example of such optical communication equipment will be explained with reference to FIG.
双方向光通信の場合、一方のｖ＆置がらの電気信号は装
置の信号ラインＳ１から電気接続コネクタ２、インター
フェイスのレシーバ回路３及び電気−光変換回路４を経
由し発光索子５より光信号として光フアイバケーブルを
介し他方の電子装置の受光素子へ送信される。一方、相
手方装置の発光素子から光フアイバケーブルを介し伝送
されてきた光信号は、受光素子７ で受光され光−電気
変換回路６ を経由し電気信号に変換された信号はイン
ターフェイスのドライバロ路３′及び電気接続コネクタ
２を介しＳ＃置の信号ラインＳ、に受イｎされる。かか
る信号の送受信において１発光索子５ を含む電気−光
変換回路４．及び受光索子７ を含む光−電気変換回路
６及びインターフェイスのレシーバ回路３、ドライバＬ
ｌ路３゛を駆動するために必要とされる電力は、この光
通信機器ｌに１１１続されている電子装置の電力ライン
Ｐから供給を受けるか若しくは外部の電力ラインがら供
給を受けてぃた。即ち、光通信機器のｔＩ！源部１４の
ｆｆｉ源レセプタクル１７に電子装置の電力ラインＰを
接続するか。In the case of two-way optical communication, the electrical signal from one V&S is transmitted from the signal line S1 of the device via the electrical connection connector 2, the receiver circuit 3 of the interface, and the electrical-to-optical conversion circuit 4, and then from the light emitting cable 5 as an optical signal. It is transmitted to the light receiving element of the other electronic device via the optical fiber cable. On the other hand, an optical signal transmitted via the optical fiber cable from the light emitting element of the other party's device is received by the light receiving element 7 and converted into an electrical signal via the optical-to-electrical conversion circuit 6. and is received via the electrical connection connector 2 to the signal line S at position S#. In transmitting and receiving such signals, an electric-to-optical conversion circuit 4 including one light emitting element 5 is used. and an optical-to-electrical conversion circuit 6 including a light receiving cable 7, a receiver circuit 3 of an interface, and a driver L.
The power required to drive the optical communication equipment 111 is supplied from the power line P of the electronic device connected to the optical communication equipment 111, or from an external power line. . That is, the tI! of optical communication equipment! Is the power line P of the electronic device connected to the ffi source receptacle 17 of the power source section 14?
或は外部ＡＣラインをＡＣアダプタ１５によりＤＣに変
換しプラグ１６を介し電源レセプタクル１７に１＊統す
ることにより、電源部１４の１＠子に＋Ｖ、電源を得、
また電源部１４のインダクタＬとコンデンサＣ、Ｃｓ
のフィルタ回路及びｏｃ−ｏｃコンバータ１８を介し
て±ｖ２電源を得ていた。ｖ１電源は発光索子５を駆動
する電気−光変換回路４＆び受光素子７ を駆動する光
−電気変換回Ｍ６ に接続され、±Ｖ ｌ Ｍｌ ＃Ｘ
はインターフェイスのレシーバ回１１７１３及びドライ
バロ路３′に接続される。電気−光変換回路４及び光−
電気変換回路６ の信号変復調には回路構成の比較的単
純な直接輝度変復調方式が採用されていて、例えば第５
図に示すように、電気−光変換回路４では入力された
電気信号のパルスデューティ時間をそのまま発光素子５
の発光時間に対応させて送信が行なわれ、また光−電気
変換回路６ では受信した光信号のパルスデューティ時
間に対応した電気信号のパルスデューティ時間に復調し
受信が行なわれていた。Alternatively, by converting the external AC line to DC using the AC adapter 15 and connecting it to the power receptacle 17 via the plug 16, +V and power are obtained from the 1@ terminal of the power supply section 14,
In addition, the inductor L and capacitors C and Cs of the power supply section 14
±v2 power was obtained through the filter circuit and the oc-oc converter 18. The v1 power supply is connected to the electric-to-optical conversion circuit 4 that drives the light-emitting element 5 and the optical-to-electrical conversion circuit M6 that drives the light-receiving element 7, and ±V l Ml #X
is connected to the receiver circuit 11713 and the driver circuit 3' of the interface. Electricity-optical conversion circuit 4 and light-
For signal modulation and demodulation of the electrical conversion circuit 6, a direct brightness modulation and demodulation method with a relatively simple circuit configuration is adopted.
As shown in the figure, in the electric-optical conversion circuit 4, the pulse duty of the input electric signal is directly applied to the light emitting element 5.
The optical-to-electric conversion circuit 6 demodulates and receives the electric signal at a pulse duty time corresponding to the pulse duty time of the received optical signal.
このように、これまでの光通信機器はインターフェイス
回路及び発光素子と電気−光変換回路及び受光素子と光
−電気変換回路等を駆動するに必要な電力を外部より別
途調達せねばならぬのでこのための設備を要し、光通イ
８機器全体としてコスト高を招きまた機器が大型化する
といった欠点があった。また、従来の光通信ｅｌ１８Ｉ
は信号変復調方式に直接輝度変復調方式を採っているた
め、光通信機器の中で最も電力消費の大きい発光素子が
電気−光変換回路に入力される電気信号のＩＩ ｉ ｇ
ｈ又はい■のパルスデューティ時間の開発光し続けてい
るので、数百ｍＷから数Ｗに及ぶ電力を消費していた。In this way, in conventional optical communication equipment, the power necessary to drive the interface circuit, light emitting element, electric-to-optical conversion circuit, light-receiving element, optical-to-electrical conversion circuit, etc. must be separately procured from outside. This has the drawback of requiring equipment for the optical communication, leading to higher costs for the optical communication equipment as a whole, and increasing the size of the equipment. In addition, conventional optical communication el18I
Since the system uses a direct brightness modulation/demodulation method as a signal modulation method, the light emitting element, which consumes the highest amount of power among optical communication devices, is used to convert the electrical signal input into the electrical-to-optical conversion circuit.
Since the light continues to emit light with a pulse duty time of h or i, it consumes power ranging from several hundred mW to several W.
この電力節減も、改善すべき課題であった。This power saving was also an issue that needed improvement.
（問題点を解決するための手段）
本発明は上述の問題点の解決を図ったもので、光通信機
器の駆動用電力を光通信ｅ１ｇｌｌに入力される電気信
号から得るよう構成したものである。即ち、インターフ
ェイス１ＬＩｌ！８及び発光素子と電気−光変換回路、
受光素子と光−電気変換回路等の駆動電力を電子装置か
ら電気−光変換回路へ入力される電気信号より取り出し
、この低レベルの電力で駆動し得るよう光通信機器回路
を構成したものである。従来の光通信機器の場合は、外
部電源から電力を得るので供給されるエネルギーには比
較的自由度がある。これに対し本発明の光通信機器では
得られる電力は電気−光変換回路に電気信号を送る電子
装置の出力ドライブ用ＩＣの能力に依存し制限されるこ
とになる。このため、電気信号から供給される電力の範
凹内で駆動するよう信号の変復調方式及び電気−光変換
回路、光−電気変換回路の信号増幅、整形回路等に改良
を加え省電力型回路としている。(Means for Solving the Problems) The present invention aims to solve the above-mentioned problems, and is configured to obtain driving power for optical communication equipment from electrical signals input to the optical communication e1gll. . That is, interface 1LIl! 8 and a light emitting element and an electric-optical conversion circuit,
The optical communication equipment circuit is constructed so that the driving power for the light receiving element, the optical-to-electrical conversion circuit, etc. is extracted from the electric signal input from the electronic device to the electrical-to-optical conversion circuit, and the optical communication equipment circuit can be driven with this low level power. . In the case of conventional optical communication equipment, since power is obtained from an external power source, there is a relative degree of freedom in the energy supplied. In contrast, in the optical communication device of the present invention, the power that can be obtained depends on and is limited by the ability of the output drive IC of the electronic device that sends electrical signals to the electrical-to-optical conversion circuit. For this reason, improvements have been made to the signal modulation/demodulation method, the electrical-to-optical conversion circuit, the signal amplification and shaping circuit of the optical-to-electrical conversion circuit, etc., so that the drive is within the range of the power supplied from the electrical signal, resulting in a power-saving circuit. There is.
次に、実施例により本発明の詳細な説明する。 Next, the present invention will be explained in detail with reference to Examples.
第１図は本発明の光通信機器のブロック回路図。FIG. 1 is a block circuit diagram of an optical communication device according to the present invention.
第２図は第１１ｉ！！Ｉのブロック回路図中の安定化ｉ
ｔｔ源回路を示し本発明の主体をなすもので、電子装置
の信号ラインからの電気信号を整流平滑化し１．光通信
機器を駆動する電力を得る回路である。第１図について
説明すると、送信側１ｉ１８１路はインターフェイス・
レシーバ回路３．入力電気信号のパルス幅を変調する変
調回路８ 、変調回路８ ヘクロック（５号を送るクロ
ック信号Ｉｉｌ＋１路９ 、及び変調された入力電気（
ｎ号を光（ご号に変換する電気−光変換回路４と発光素
子５から膚り、また受信側回路は送信されてきた光信号
を受光し電気信号に変換する受光索子７ と光−電気変
換回路６ 、この受４ｒ１電気（ｎ号を復調する内部タ
イマーを有する復！Ｉ１口路１０及びインターフェイス
・ドライバ回１１７１３’から成っている。そして、こ
れら送信、受信回路を駆動するための安定化電源回路１
１が設けられている。この安定化電源回路ＩＩは、上述
のように電子装置からのＸ４１ｉ’Ａ信号から光通、信
ｎ器の駆動電力を形成するものである。なお、図中で説
明が容易なよう信号回路線は１１線、電力回路線は太線
で示すことにする。さて、電子装置回路の信号出力ＩＣ
（図示せず）から送られた電気信号は電子装置の信号ラ
インＳ１から電気接続コネクタ２を介し光通４８機器１
八入力される。入力した電気信号は、インターフェイス
・レシーバ回路３を経由して信号路線を通して伝送され
ると同時に、この電気信号の有する電力を取り込むため
、安定化型ＷＡ口路１１に入力される。先ず送信側回路
について説明すると、インターフェイス・レシーバ回路
３からの電気信号は変調回路８ に入り、ここでクロッ
ク回路９ から変調回路８ に送られているクロック信
号の前縁で入力電気信号にパルス幅変調をかけパルス幅
変調信号を形成する。この変調された信号が電気−光変
換回路を経由し発光索子５より光信号として光フアイバ
ケーブルを経由し、相手方電子装置の受光素子へ送信さ
れる。一方、受信Ｉ回路では、相手方装置の発光素子か
ら光フアイバケーブル経由で上記送信の場合と同様にし
て変調伝送されてきた光信号が受光素子７ で受光、光
−電気変換回路６を経由し電気信号に変換される。この
変、１１電気信号は復調回路１０へ入り、復調回路ｌＯ
に内蔵されたタイマのタイマ波形を検知比較し、変調電
食（信号を復調する。復調された電気信号はインターフ
ェイス・ドライバ回路：１’、 １′Ｉｔ気ｔｉ続コネ
クタ２を介し電子装はの信号ラインＳ２に受信される０
次に、かかる送、受信回路を駆動するための電力の供給
手段について第２図に沿い説明する０図は入力電気信号
エネルギーを光通信機器部ＦＩＩ電力に変換する安定化
電源回路を示す＋Ｄ１，０２は整流ダイオード、Ｃ，、
Ｃ，は平−滑コンデンサ、＋２は電圧レギュレータ、＋
３はＤＣ−ＤＣコンバータ、Ｄｌ、Ｄ、は保護用ダイオ
ード＋Ｃ３はフィルター用コンデンサである。電子機器
側信号ラインＳ１から電気接続コネクタ２を介し入力さ
れた電気信号は、中電位、−電位に応じそれぞれ！！！
流ダイオードＤ Ｉ ＊ Ｄ ２で′４１ｉ流され、平
滑コンデンサＣ１Ｃ２により平滑された後、電圧レギュ
レータ１２から安定化された＋、Ｖ＋電源が、またＤＣ
−ＤＣコンバータ１３からは安定化された±ｖ２電源が
出力される。＋Ｖ、電源は送信回路の変調回路８ 、ク
ロック信号回路９ 及び発光索子５を含む電気−光変換
回路４ 拉びに受信回路の発光索子７ を含む光−電気
変換］す路６ に供給され、±ｖ２電源はインターフェ
イス・レシーバ回路３．インターフェイス・ドライバ回
路３′に供給される。しかし、安定化電源回路ＩＩから
供給される電力は前述したように接続された電子装置の
電気信号出力用ＩＣの能力により制限されるものである
。このため、光通信機器の中で最も電力を消費する発光
素子５の駆動方式を従来の直接輝度変調方式からパルス
幅変調方式に改良し、発光素子５の発光時間を従来方式
の数十分の１に低減せしめている。第３Ｅｉ（Ｑ）は信
号のパルス幅変調方式を説明するもので、入力電気信号
は変調回路ａ において、クロック信号回路９ より送
られるクロック信号の立ち上がりタイミングに前記入力
電気信号のＨｌ（ｈ、Ｌｏｖを検知し、入力電気信号の
立ち上がりをクロック信号の２周期に、また入力電気信
号の立ち下りをクロック信号の１周期に変調し、この変
調された１３号を電気−光変換回路４ へ送信する。こ
の変調信号により駆動された発光素子５は従来のように
入力電気信号で直接駆動されるのに比較し発光時間を数
十分の１に低減することができる。−方、相手方電子装
置の電気−光変換回路より送られてきた変調信号は第３
図（ｂ）に示すように復調回路ｌＯに内蔵されたタイマ
のクロック波形と検知比較されｍｇｔｔｔ気信号として
出力される。Figure 2 is 11i! ! Stabilization i in the block diagram of I
This is a tt source circuit, which is the main subject of the present invention, and rectifies and smoothes electrical signals from the signal line of an electronic device.1. This is a circuit that obtains power to drive optical communication equipment. To explain FIG. 1, the transmitting side 1i181 path is the interface
Receiver circuit 3. A modulation circuit 8 modulates the pulse width of the input electric signal, a clock signal Iil+1 path 9 which sends a clock signal (No. 5) to the modulation circuit 8, and a modulated input electric signal (
An electric-to-optical conversion circuit 4 and a light emitting element 5 convert n to light, and a receiving circuit receives a transmitted optical signal and converts it into an electrical signal. It consists of an electrical converter circuit 6, a demodulator I1 port 10 with an internal timer for demodulating the receiver 4R1 electrical signal (n), and an interface driver circuit 11713'. power supply circuit 1
1 is provided. This stabilized power supply circuit II generates driving power for the optical communication device from the X41i'A signal from the electronic device as described above. In addition, in order to facilitate explanation in the figure, signal circuit lines are shown as 11 lines, and power circuit lines are shown as thick lines. Now, the signal output IC of the electronic device circuit
(not shown) The electrical signal sent from the optical communication device 1 is transmitted from the signal line S1 of the electronic device through the electrical connection connector 2.
8 are input. The input electric signal is transmitted through the signal line via the interface receiver circuit 3, and at the same time is input to the stabilized WA port 11 in order to take in the power of this electric signal. First, to explain the transmitting side circuit, the electrical signal from the interface/receiver circuit 3 enters the modulation circuit 8, where the leading edge of the clock signal sent from the clock circuit 9 to the modulation circuit 8 adds a pulse width to the input electrical signal. Modulation is applied to form a pulse width modulated signal. This modulated signal is transmitted as an optical signal from the light-emitting cable 5 via the electro-optical conversion circuit to the light-receiving element of the other party's electronic device via the optical fiber cable. On the other hand, in the reception I circuit, an optical signal modulated and transmitted from the light emitting element of the other device via the optical fiber cable in the same manner as in the above transmission case is received by the light receiving element 7, and is transmitted to the optical fiber converter circuit 6 to receive the optical signal. converted into a signal. This variable 11 electric signal enters the demodulation circuit 10, and the demodulation circuit lO
The timer waveform of the built-in timer is detected and compared, and the modulated electrolytic signal is demodulated.The demodulated electrical signal is sent to the electronic equipment via the interface driver circuit: 1', 0 received on signal line S2
Next, the means for supplying power for driving such transmitting and receiving circuits will be explained with reference to FIG. 02 is a rectifier diode, C,...
C, is a smoothing capacitor, +2 is a voltage regulator, +
3 is a DC-DC converter, Dl, D are protection diodes, and C3 is a filter capacitor. The electrical signals input from the electronic device side signal line S1 through the electrical connection connector 2 correspond to medium potential and - potential, respectively! ! !
After being passed through the current diode DI*D2 and smoothed by the smoothing capacitor C1C2, the stabilized +, V+ power supply from the voltage regulator 12 is also
- The DC converter 13 outputs a stabilized ±v2 power source. +V, the power is supplied to an electrical-to-optical conversion circuit 4 including a modulation circuit 8, a clock signal circuit 9, and a light-emitting wire 5 of the transmitting circuit, and an optical-to-electrical converter path 6 including a light-emitting wire 7 of the receiving circuit. , ±v2 power supply is the interface receiver circuit 3. The signal is supplied to the interface driver circuit 3'. However, as described above, the power supplied from the stabilized power supply circuit II is limited by the capability of the electric signal output IC of the connected electronic device. For this reason, the driving method of the light emitting element 5, which consumes the most power in optical communication equipment, has been improved from the conventional direct brightness modulation method to the pulse width modulation method, and the light emitting time of the light emitting element 5 has been reduced to several tens of minutes compared to the conventional method. It has been reduced to 1. The third Ei (Q) explains the pulse width modulation method of the signal, in which the input electric signal is input to the modulation circuit a, and at the rising timing of the clock signal sent from the clock signal circuit 9, the input electric signal Hl (h, Lov , modulates the rising edge of the input electrical signal into two periods of the clock signal, modulates the falling edge of the input electrical signal into one period of the clock signal, and transmits this modulated No. 13 to the electro-optical conversion circuit 4. The light emitting element 5 driven by this modulation signal can reduce the light emitting time to several tenths of that of the conventional one driven directly by an input electric signal. The modulated signal sent from the electrical-optical conversion circuit is the third
As shown in Figure (b), the signal is detected and compared with the clock waveform of a timer built in the demodulation circuit IO, and is output as a mgttt signal.
以上１本発明光通信機器は、その信号駆動方式にパルス
幅変復調方式を採用して駆動電力の低減化を図り、光通
信機器の駆動電力を光通信機器へ入力される重置信号よ
り得るよう構成したので。The optical communication equipment of the present invention employs a pulse width modulation/demodulation method as its signal driving method to reduce driving power, and obtains the driving power of the optical communication equipment from a superimposed signal input to the optical communication equipment. Since I configured it.
外部電力源が不要となり、設備する上での煩雑さが解４
１され、また、光通信機器のコスト低減、小型化及び省
電力化が図られ、その産業へ寄与する効果は極めて大き
いものがある。Eliminates the need for an external power source, reducing the complexity of installation4
1, and the cost reduction, miniaturization, and power saving of optical communication equipment have been achieved, and the effect of contributing to the industry is extremely large.
第１図は本発明光通信機器の１実施例を示す回路図、第
２図は本発明光通信Ｖ＆器の安定化ｔｔｔ源回′Ｓ図の
！実施例を示し、第３図（ａ） 、 （ｂ）はそれぞれ
信号のパルス幅変調方式及びパル各輻複調方式を説明す
るための波形図、ｔｊＳ４図は従来の光通信機器の回路
図、第５ｖＡ（ａ）、（ｂ）はそれぞれ直接輝度変調方
式及び復調方式を説明する波形図である。
ｌ・・光通信機器、２・・・電気接続コネクタ３・・・
インターフＸイス・レジ−Ａ’ｌｉ１％、３’ ＝−
インターフＸイス・ト“ライ八“回路、４・・・電気−
光変換回路、５・・・発光素子、６・・・光−電気変換
回路７・・・受光素子、８・・・変調回路、９出りｏｌ
り信号ｉｑ路、１Ｇ・・・復調回路、１１・・・安定化
′ｄ１ＷＸ回路１２・・・し牛１スレータ 、１３・・
・ＤＣ−ＤＣコンバータＤ、、Ｄ２．Ｄ３．Ｄ、＝−９
Ｍ２−）’ 、 Ｃ，、Ｃ，、Ｃ，・・・コンデン
サ、Ｓ、、Ｓ、・・・信号ライン＋ Ｖ ＋ 、 十Ｖ
２ 、− Ｖ ２ 、・・・出力電源第 １
図
第 ３
図（ａ）
第 ２
図
第 ３
ａ！（ｂ）Fig. 1 is a circuit diagram showing one embodiment of the optical communication equipment of the present invention, and Fig. 2 is a diagram of the stabilizing ttt source circuit of the optical communication V& 3(a) and 3(b) are waveform diagrams for explaining the signal pulse width modulation method and the pulse harmonic modulation method, respectively, and FIG. 3A is a circuit diagram of a conventional optical communication device. 5VA (a) and (b) are waveform diagrams illustrating a direct brightness modulation method and a demodulation method, respectively. l...Optical communication equipment, 2...Electrical connection connector 3...
Interf X chair cashier-A'li1%, 3' =-
INTERF
Optical conversion circuit, 5... Light emitting element, 6... Optical-electrical conversion circuit 7... Light receiving element, 8... Modulation circuit, 9 output OL
signal iq path, 1G... demodulation circuit, 11... stabilization 'd1WX circuit 12... cow 1 slater, 13...
・DC-DC converter D,, D2. D3. D, =-9
M2-)', C,, C,, C,... Capacitor, S,, S,... Signal line + V +, 10 V
2, -V2,... Output power supply Fig. 1 Fig. 3 (a) Fig. 2 Fig. 3 a! (b)
Claims (1)
−光変換回路と、光信号を入力しこれを電気信号として
変換出力する光−電気変換回路とを具備し、そのインタ
ーフェイスがＲＳ−２３２Ｃ若しくはノーマルハイの信
号極性である双方向光通信機器において、該光通信機器
を駆動せしめるための電力を前記電気−光変換回路に入
力される電気信号のエネルギーより得るとともに、前記
電気−光変換回路及び前記光−電気変換回路に信号のパ
ルス幅変復調回路を設け、前記光通信機器が前記電気−
光変換回路に入力される電気信号のエネルギーより低い
電力で駆動するよう、構成したことを特徴とする光通信
機器。It is equipped with an electrical-to-optical conversion circuit that inputs an electrical signal and converts and outputs it as an optical signal, and an optical-electrical conversion circuit that inputs an optical signal and converts and outputs it as an electrical signal, and the interface is RS-232C or In a two-way optical communication device with normal high signal polarity, the power for driving the optical communication device is obtained from the energy of the electric signal input to the electric-to-optical conversion circuit, and the electric-to-optical conversion circuit and A signal pulse width modulation/demodulation circuit is provided in the optical-to-electrical conversion circuit, and the optical communication device
An optical communication device characterized in that it is configured to be driven with lower power than the energy of an electrical signal input to an optical conversion circuit.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62229640A JPH0671231B2 (en) | 1987-09-16 | 1987-09-16 | Optical communication equipment |
| DE3831296A DE3831296A1 (en) | 1987-09-16 | 1988-09-14 | OPTICAL COMMUNICATION UNIT |
| GB8821519A GB2209899B (en) | 1987-09-16 | 1988-09-14 | Optical communication apparatus and method |
| US07/546,690 US5040242A (en) | 1987-09-16 | 1990-06-28 | Optical communication apparatus and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62229640A JPH0671231B2 (en) | 1987-09-16 | 1987-09-16 | Optical communication equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0284829A true JPH0284829A (en) | 1990-03-26 |
| JPH0671231B2 JPH0671231B2 (en) | 1994-09-07 |
Family
ID=16895368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62229640A Expired - Fee Related JPH0671231B2 (en) | 1987-09-16 | 1987-09-16 | Optical communication equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0671231B2 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58146152A (en) * | 1982-02-25 | 1983-08-31 | Yokogawa Hokushin Electric Corp | Optical transmission system |
| JPS58172039A (en) * | 1982-04-02 | 1983-10-08 | Ricoh Co Ltd | Optical transmission system |
| JPS62198275A (en) * | 1986-02-26 | 1987-09-01 | Matsushita Electric Ind Co Ltd | Image light transmitter |
-
1987
- 1987-09-16 JP JP62229640A patent/JPH0671231B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58146152A (en) * | 1982-02-25 | 1983-08-31 | Yokogawa Hokushin Electric Corp | Optical transmission system |
| JPS58172039A (en) * | 1982-04-02 | 1983-10-08 | Ricoh Co Ltd | Optical transmission system |
| JPS62198275A (en) * | 1986-02-26 | 1987-09-01 | Matsushita Electric Ind Co Ltd | Image light transmitter |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0671231B2 (en) | 1994-09-07 |
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|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |