JPS56134834A - Alternating current two-wire photoelectric switch - Google Patents
Alternating current two-wire photoelectric switchInfo
- Publication number
- JPS56134834A JPS56134834A JP3711080A JP3711080A JPS56134834A JP S56134834 A JPS56134834 A JP S56134834A JP 3711080 A JP3711080 A JP 3711080A JP 3711080 A JP3711080 A JP 3711080A JP S56134834 A JPS56134834 A JP S56134834A
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- current
- flowed
- turned
- receiving circuit
- 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
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/78—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled
- H03K17/795—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled controlling bipolar transistors
- H03K17/7955—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled controlling bipolar transistors using phototransistors
Landscapes
- Electronic Switches (AREA)
Abstract
PURPOSE:To reduce the residual voltage at the turning-on time and suppress heat evolution, by flowing the current, which should be flowed to the control terminal, to another part in accordance with the output of the light projecting and receiving circuit by the transistor. CONSTITUTION:When the output of light projecting and receiving circuit 3 is ''H'', transistors 13 and 11 are turned on; and when capacitor 17 is charged to become a Zener voltage or more, Zener diode 6 is turned on, and the current is flowed to the base of transistor 12. The base current of transistor 11 passes through transistor 12 and is flowed through transistor 13 furthermore, and transistor 11 is turned off. At this time, a constant current is supplied to the light projecting and receiving circuit 3 side.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3711080A JPS56134834A (en) | 1980-03-24 | 1980-03-24 | Alternating current two-wire photoelectric switch |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3711080A JPS56134834A (en) | 1980-03-24 | 1980-03-24 | Alternating current two-wire photoelectric switch |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56134834A true JPS56134834A (en) | 1981-10-21 |
Family
ID=12488454
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3711080A Pending JPS56134834A (en) | 1980-03-24 | 1980-03-24 | Alternating current two-wire photoelectric switch |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56134834A (en) |
-
1980
- 1980-03-24 JP JP3711080A patent/JPS56134834A/en active Pending
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