JPH0432034U - - Google Patents
Info
- Publication number
- JPH0432034U JPH0432034U JP7495290U JP7495290U JPH0432034U JP H0432034 U JPH0432034 U JP H0432034U JP 7495290 U JP7495290 U JP 7495290U JP 7495290 U JP7495290 U JP 7495290U JP H0432034 U JPH0432034 U JP H0432034U
- Authority
- JP
- Japan
- Prior art keywords
- phototransistor
- transistor
- resistance
- connection point
- transistor connected
- 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
- 230000003287 optical effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 1
Landscapes
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Description
第１図は本考案の一実施例を示す光センサ回路
の構成図、第２図はトランジスタの動作を示すＶ
ＢＥ−ＩＣ特性図、第３図ａは従来の光センサ回
路の構成図、第３図ｂはその等価回路である。
ＰＴ……フオトトランジスタ、Ｔｒ……トラン
ジスタ、Ｒ１，Ｒ２……抵抗、Ｃ１，Ｃ２……コ
ンデンサ、Ｖｃｃ……電源電圧、Ｖｏ……出力直
流電圧、ＶＢＥ……ベース・エミツタ間電圧、Ｖ
Ｃ……コレクタ電圧、ＩＣ……コレクタ電流。
Fig. 1 is a block diagram of an optical sensor circuit showing an embodiment of the present invention, and Fig. 2 is a diagram showing the operation of a transistor.
In the BE-IC characteristic diagram, FIG. 3a is a configuration diagram of a conventional optical sensor circuit, and FIG. 3b is an equivalent circuit thereof. PT...Phototransistor, Tr...Transistor, R1 , R2 ...Resistor, C1 , C2 ...Capacitor, Vcc...Power supply voltage, Vo...Output DC voltage, VBE...Base-emitter voltage ,V
C...Collector voltage, IC...Collector current.
Claims (1)
いて、前記フオトトランジスタに直列に接続され
たトランジスタと、前記フオトトランジスタとト
ランジスタとの接続点と接地との間に接続され、
その接続点に加わる電圧を抵抗分割させる抵抗分
割手段とを備え、上記抵抗分割された電圧が前記
トランジスタのベースに供給される構成を特徴と
する光センサ回路。 In an optical sensor circuit using a phototransistor, a transistor connected in series to the phototransistor, and a transistor connected between a connection point between the phototransistor and the transistor and ground,
A photosensor circuit comprising: resistance dividing means for resistance-dividing the voltage applied to the connection point, and the resistance-divided voltage is supplied to the base of the transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7495290U JPH0432034U (en) | 1990-07-12 | 1990-07-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7495290U JPH0432034U (en) | 1990-07-12 | 1990-07-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0432034U true JPH0432034U (en) | 1992-03-16 |
Family
ID=31615101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7495290U Pending JPH0432034U (en) | 1990-07-12 | 1990-07-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0432034U (en) |
-
1990
- 1990-07-12 JP JP7495290U patent/JPH0432034U/ja active Pending