JPH02120940U - - Google Patents
Info
- Publication number
- JPH02120940U JPH02120940U JP1989028464U JP2846489U JPH02120940U JP H02120940 U JPH02120940 U JP H02120940U JP 1989028464 U JP1989028464 U JP 1989028464U JP 2846489 U JP2846489 U JP 2846489U JP H02120940 U JPH02120940 U JP H02120940U
- Authority
- JP
- Japan
- Prior art keywords
- effect transistor
- light emitting
- drain
- source
- emitting device
- 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
- 230000005669 field effect Effects 0.000 claims description 4
- 230000005684 electric field Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Description
第１図は本考案の発光素子駆動回路の一実施例
を示す回路図、第２図は第１図の電界効果トラン
ジスタのＶｇｓ−Ｉｄｓ特性および動作原理を示
す説明図である。
１……電界効果トランジスタ、２……レーザダ
イオード（発光素子）、３……トランジスタ、４
……チヨークコイル、５……ホトカプラ、６，７
……ゲートバイアス抵抗、８……ソースバイアス
抵抗。
FIG. 1 is a circuit diagram showing an embodiment of the light emitting device driving circuit of the present invention, and FIG. 2 is an explanatory diagram showing the V gs -I ds characteristics and operating principle of the field effect transistor of FIG. 1. 1... Field effect transistor, 2... Laser diode (light emitting element), 3... Transistor, 4
...Chiyoke coil, 5...Photocoupler, 6,7
...Gate bias resistance, 8...Source bias resistance.
Claims (1)
信号を入力し、そのドレインに接続された発光素
子を駆動するソース接地形の発光素子駆動回路に
おいて、前記電界効果トランジスタのゲートバイ
アス電圧を外部制御信号により制御し該電界効果
トランジスタのドレイン・ソース間電流を遮断す
る回路を設けたことを特徴とする発光素子駆動回
路。 In a source-grounded light emitting device drive circuit that inputs a digital signal from the gate of a field effect transistor and drives a light emitting device connected to its drain, the gate bias voltage of the field effect transistor is controlled by an external control signal to control the electric field. A light-emitting element drive circuit characterized by being provided with a circuit that blocks current between the drain and source of an effect transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989028464U JPH02120940U (en) | 1989-03-15 | 1989-03-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989028464U JPH02120940U (en) | 1989-03-15 | 1989-03-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02120940U true JPH02120940U (en) | 1990-10-01 |
Family
ID=31251854
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989028464U Pending JPH02120940U (en) | 1989-03-15 | 1989-03-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02120940U (en) |
-
1989
- 1989-03-15 JP JP1989028464U patent/JPH02120940U/ja active Pending
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