JPS6023841U - light detection circuit - Google Patents
light detection circuitInfo
- Publication number
- JPS6023841U JPS6023841U JP11376183U JP11376183U JPS6023841U JP S6023841 U JPS6023841 U JP S6023841U JP 11376183 U JP11376183 U JP 11376183U JP 11376183 U JP11376183 U JP 11376183U JP S6023841 U JPS6023841 U JP S6023841U
- Authority
- JP
- Japan
- Prior art keywords
- phototransistor
- detection circuit
- light detection
- ambient brightness
- prevented
- 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
Landscapes
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は、従来の光検出回路、第２図は本考案の一実施
例を示す回路図である。
図において、１． ２． ３． ４． ５． ６． ７
・・・端子、８・・・発光ダイオード、９・・・ホトト
ランジスタ、１０・・・トランジスタ、１１，１２．１
３・・・抵抗、１４・・・Ｃｄ５１である。FIG. 1 is a circuit diagram showing a conventional photodetection circuit, and FIG. 2 is a circuit diagram showing an embodiment of the present invention. In the figure, 1. 2. 3. 4. 5. 6. 7
...Terminal, 8...Light emitting diode, 9...Phototransistor, 10...Transistor, 11, 12.1
3...Resistance, 14...Cd51.
Claims (1)
スタの近傍に配設されこのホトトランジスタのエミッタ
抵抗と直列に接続されかつ周囲の明るさに感応してその
抵抗値を変化させる感光素子とを備え、前記ホトトラン
ジスタが周囲の明るさによって誤動作しないようにした
ことを特徴とする光検出回路。The phototransistor includes a phototransistor that receives signal light, and a photosensitive element that is disposed near the phototransistor and connected in series with the emitter resistance of the phototransistor and changes its resistance value in response to ambient brightness. A photodetection circuit characterized in that a phototransistor is prevented from malfunctioning due to ambient brightness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11376183U JPS6023841U (en) | 1983-07-22 | 1983-07-22 | light detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11376183U JPS6023841U (en) | 1983-07-22 | 1983-07-22 | light detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6023841U true JPS6023841U (en) | 1985-02-18 |
Family
ID=30263220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11376183U Pending JPS6023841U (en) | 1983-07-22 | 1983-07-22 | light detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6023841U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62124524U (en) * | 1986-01-31 | 1987-08-07 |
-
1983
- 1983-07-22 JP JP11376183U patent/JPS6023841U/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62124524U (en) * | 1986-01-31 | 1987-08-07 |
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