JPH0463658U - - Google Patents
Info
- Publication number
- JPH0463658U JPH0463658U JP10670590U JP10670590U JPH0463658U JP H0463658 U JPH0463658 U JP H0463658U JP 10670590 U JP10670590 U JP 10670590U JP 10670590 U JP10670590 U JP 10670590U JP H0463658 U JPH0463658 U JP H0463658U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- light emitting
- emitting diode
- transistor
- input terminal
- 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
- 230000010354 integration Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
Landscapes
- Optical Communication System (AREA)
Description
第１図は本考案の一実施例の回路図、第２図は
第２の実施例の回路図、第３図は光通信装置の内
部構成例、第４図は従来の発光ダイオード駆動回
路の一例、第５図は第１図の動作タイミングチヤ
ートである。
１……アンドーゲートバツフア、２，３……抵
抗、４，３９，４３，４５……コンデンサ、５…
…発光ダイオード、６……リフアレンス電圧、７
……誤差増幅器、８……比較回路、９，１０，１
１，１２……比較回路の出力端子、１３，１４，
１５，１６……電流制限抵抗、１７，１８，１９
，２０……トランジスタ、２１……アンドゲート
バツフアの入力端子、２２，２３……光フアイバ
ーケーブル、２４……光・電気変換器（Ｏ／Ｅと
略す）、２５……レベル変換回路、３６……信号
再生及び信号復号化回路、２７……信号符号化回
路、２８……電気・光変換器（Ｅ／Ｏと略す）、
２９……タイミング抽出回路、３０……発光ダイ
オード、３１……電流制限抵抗、３２……トラン
ジスタ保護抵抗、３３……トランジスタ、３４…
…トランジスタ入力端子、４０，４１……整流ダ
イオード。
Figure 1 is a circuit diagram of one embodiment of the present invention, Figure 2 is a circuit diagram of a second embodiment, Figure 3 is an example of the internal configuration of an optical communication device, and Figure 4 is a diagram of a conventional light emitting diode drive circuit. As an example, FIG. 5 is an operation timing chart of FIG. 1. 1... And gate buffer, 2, 3... Resistor, 4, 39, 43, 45... Capacitor, 5...
...Light emitting diode, 6...Reference voltage, 7
...Error amplifier, 8...Comparison circuit, 9, 10, 1
1, 12... Output terminal of comparison circuit, 13, 14,
15, 16... Current limiting resistor, 17, 18, 19
, 20... Transistor, 21... Input terminal of AND gate buffer, 22, 23... Optical fiber cable, 24... Optical/electrical converter (abbreviated as O/E), 25... Level conversion circuit, 36 ... Signal reproduction and signal decoding circuit, 27 ... Signal encoding circuit, 28 ... Electrical-optical converter (abbreviated as E/O),
29... Timing extraction circuit, 30... Light emitting diode, 31... Current limiting resistor, 32... Transistor protection resistor, 33... Transistor, 34...
...Transistor input terminal, 40, 41... Rectifier diode.
Claims (1)
続したアンドゲートバツフアと、発光ダイオード
のアノードに接続した積分回路と、コレクタに電
流制限抵抗が直列接続し、前記抵抗の片端が電源
に接続し、エミツタが共通に接続したトランジス
タ群と、前記積分回路の出力が非反転入力端子に
接続し、反転入力端子にはリフアレンス電圧が接
続した差動増幅器と、前記差動増幅器の出力に入
力端が接続し、複数の出力端子の各々が前記トラ
ンジスタ群の各トランジスタのベースにそれぞれ
接続した比較回路とで構成された発光ダイオード
駆動回路。 ２ 請求項１記載の発光ダイオード駆動回路にお
いて、前記積分回路のかわりに全波整流回路付の
積分回路を備えたことを特徴とする発光ダイオー
ド駆動回路。[Claims for Utility Model Registration] 1. An AND gate buffer connected to the anode of a light emitting diode through a resistor, an integrating circuit connected to the anode of the light emitting diode, and a current limiting resistor connected in series to the collector, a group of transistors whose one end is connected to a power supply and whose emitters are connected in common; a differential amplifier whose output of the integration circuit is connected to a non-inverting input terminal and whose inverting input terminal is connected to a reference voltage; and the differential amplifier. and a comparison circuit having an input terminal connected to the output of the transistor, and a comparison circuit having a plurality of output terminals each connected to the base of each transistor of the transistor group. 2. The light emitting diode drive circuit according to claim 1, further comprising an integrating circuit with a full-wave rectifier circuit instead of the integrating circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10670590U JPH0463658U (en) | 1990-10-11 | 1990-10-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10670590U JPH0463658U (en) | 1990-10-11 | 1990-10-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0463658U true JPH0463658U (en) | 1992-05-29 |
Family
ID=31852902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10670590U Pending JPH0463658U (en) | 1990-10-11 | 1990-10-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0463658U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010171199A (en) * | 2009-01-22 | 2010-08-05 | Panasonic Electric Works Co Ltd | Light emitting diode driving device and lighting instrument using the same, in-cabin lighting device, and lighting device for vehicle |
-
1990
- 1990-10-11 JP JP10670590U patent/JPH0463658U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010171199A (en) * | 2009-01-22 | 2010-08-05 | Panasonic Electric Works Co Ltd | Light emitting diode driving device and lighting instrument using the same, in-cabin lighting device, and lighting device for vehicle |
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