JPH0461931U - - Google Patents
Info
- Publication number
- JPH0461931U JPH0461931U JP10551290U JP10551290U JPH0461931U JP H0461931 U JPH0461931 U JP H0461931U JP 10551290 U JP10551290 U JP 10551290U JP 10551290 U JP10551290 U JP 10551290U JP H0461931 U JPH0461931 U JP H0461931U
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- transistors
- collector
- light emitting
- base
- 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
- 239000003990 capacitor Substances 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Electronic Switches (AREA)
Description
第１図は本発明の一実施例を示す回路図、第２
図Ａ〜Ｄはそれぞれ主要部の波形図を示す。
Figure 1 is a circuit diagram showing one embodiment of the present invention, Figure 2 is a circuit diagram showing an embodiment of the present invention.
Figures A to D each show waveform diagrams of main parts.
Claims (1)
タＴＲ１，ＴＲ２のうち、一方のトランジスタの
ベース・コレクタ間に負帰還抵抗Ｒ１を接続し、
電流制限抵抗Ｒ４で規制された他方のトランジス
タに直列に発光ダイオードを接続すると共に、上
記一方のトランジスタのベースと上記他方のトラ
ンジスタのコレクタ間にコンデンサを設けてなる
投光回路であつて、上記他方のトランジスタのス
レシユホールド電圧を上記一方のトランジスタの
バイアス電圧よりも高くしたことを特徴とする光
電スイツチの投光回路。 A negative feedback resistor R1 is connected between the base and collector of one of a pair of transistors TR1 and TR2 consisting of PNP and NPN,
A light emitting circuit comprising: a light emitting diode connected in series with the other transistor regulated by a current limiting resistor R4; and a capacitor provided between the base of the one transistor and the collector of the other transistor; A light projection circuit for a photoelectric switch, characterized in that the threshold voltage of the transistor is set higher than the bias voltage of one of the transistors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10551290U JPH0461931U (en) | 1990-10-05 | 1990-10-05 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10551290U JPH0461931U (en) | 1990-10-05 | 1990-10-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0461931U true JPH0461931U (en) | 1992-05-27 |
Family
ID=31851219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10551290U Pending JPH0461931U (en) | 1990-10-05 | 1990-10-05 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0461931U (en) |
-
1990
- 1990-10-05 JP JP10551290U patent/JPH0461931U/ja active Pending