JPS61199064U - - Google Patents
Info
- Publication number
- JPS61199064U JPS61199064U JP1985082779U JP8277985U JPS61199064U JP S61199064 U JPS61199064 U JP S61199064U JP 1985082779 U JP1985082779 U JP 1985082779U JP 8277985 U JP8277985 U JP 8277985U JP S61199064 U JPS61199064 U JP S61199064U
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- emitting diode
- reference potential
- emitter
- resistor
- 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
- 238000010586 diagram Methods 0.000 description 6
- 239000003990 capacitor Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
Description
第１図は本考案の一実施例の発光ダイオード駆
動回路の構成を示す回路図、第２図は第１図のト
ランジスタ５のエミツタとアース間のインピーダ
ンスの絶対値の周波数特性を示す特性図、第３図
は第１図の発光ダイオード７の駆動電流と光出力
の関係を示す発光特性図、第４図は従来の発光ダ
イオード駆動回路の構成を示す回路図、第５図は
従来回路の問題点を説明するための特性図、第６
図は典型的な発光ダイオードの駆動電流対光出力
の周波数応答特性を示す特性図である。
１……アナログベースバンド信号の入力端子、
２……結合コンデンサ、５……駆動用トランジス
タ、６……エミツタと接地電位間に接続される抵
抗器、７……発光ダイオード、８……電源供給端
子、９……結合コンデンサ、１０……可変抵抗器
、１１……ダイオード、１２……線輪、１４……
可変電圧源。
FIG. 1 is a circuit diagram showing the configuration of a light emitting diode drive circuit according to an embodiment of the present invention, FIG. 2 is a characteristic diagram showing the frequency characteristics of the absolute value of the impedance between the emitter of the transistor 5 of FIG. 1 and the ground, Fig. 3 is a light emission characteristic diagram showing the relationship between the drive current and light output of the light emitting diode 7 in Fig. 1, Fig. 4 is a circuit diagram showing the configuration of a conventional light emitting diode drive circuit, and Fig. 5 is a problem with the conventional circuit. Characteristic diagram for explaining the points, No. 6
The figure is a characteristic diagram showing the frequency response characteristic of drive current versus light output of a typical light emitting diode. 1... Analog baseband signal input terminal,
2... Coupling capacitor, 5... Drive transistor, 6... Resistor connected between emitter and ground potential, 7... Light emitting diode, 8... Power supply terminal, 9... Coupling capacitor, 10... Variable resistor, 11...diode, 12... wire ring, 14...
Variable voltage source.
Claims (1)
ミツタ、駆動対称の発光ダイオードを介して第２
の基準電位に接続されるコネクタ及びアナログ信
号を受けるベースを有するトランジスタを備えた
発光ダイオード駆動回路において、 前記トランジスタのエミツタと第１の基準電位
間に接続される抵抗器、ダイオード及び線輪の直
列接続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] The emitter is connected to the first reference potential via a resistor, and the second
A light-emitting diode driving circuit comprising a transistor having a connector connected to a reference potential of the transistor and a base receiving an analog signal, comprising: a resistor, a diode and a wire connected in series between the emitter of the transistor and a first reference potential; A light emitting diode drive circuit characterized by comprising a connection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985082779U JPS61199064U (en) | 1985-05-31 | 1985-05-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985082779U JPS61199064U (en) | 1985-05-31 | 1985-05-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61199064U true JPS61199064U (en) | 1986-12-12 |
Family
ID=30630800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985082779U Pending JPS61199064U (en) | 1985-05-31 | 1985-05-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61199064U (en) |
-
1985
- 1985-05-31 JP JP1985082779U patent/JPS61199064U/ja active Pending