JPS55680A - Detection switch - Google Patents
Detection switchInfo
- Publication number
- JPS55680A JPS55680A JP2923879A JP2923879A JPS55680A JP S55680 A JPS55680 A JP S55680A JP 2923879 A JP2923879 A JP 2923879A JP 2923879 A JP2923879 A JP 2923879A JP S55680 A JPS55680 A JP S55680A
- Authority
- JP
- Japan
- Prior art keywords
- resistance
- diode
- load
- serial circuit
- power source
- 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
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/72—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region
- H03K17/73—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region for dc voltages or currents
Landscapes
- Thyristor Switches And Gates (AREA)
- Electronic Switches (AREA)
Abstract
PURPOSE:To reduce the current of the detection circuit down to such amount that the load is never driven by the resistance by connecting the load and the power source in series as well as the serial circuit of the resistance and the capacitor in parallel respectively to the serial circuit of the 3-terminal switching element and the diode. CONSTITUTION:The serial circuit of 3-terminal switching element 18 and constant voltage diode 19 is connected to the power source via load 27. Thus photoelectric switch DS features the double-wire system. At the same time, the serial circuit of resistance 20, constant voltage diode 24, resistance 25 and capacitor 21 is connected between the diodes of element 18 and diode 19. In addition, the connection between diode 24 and resistance 25 is connected to the cathode of element 18 via light emitting diode 26. Thus, when transistor 22 and then element 18 are turned off, the current given from the power source is reduced down to a slight amount by resistance 20. As a result, the load driving is prevented.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2923879A JPS55680A (en) | 1979-03-12 | 1979-03-12 | Detection switch |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2923879A JPS55680A (en) | 1979-03-12 | 1979-03-12 | Detection switch |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4308674A Division JPS5422819B2 (en) | 1974-04-16 | 1974-04-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55680A true JPS55680A (en) | 1980-01-07 |
Family
ID=12270651
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2923879A Pending JPS55680A (en) | 1979-03-12 | 1979-03-12 | Detection switch |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55680A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57197920A (en) * | 1981-05-29 | 1982-12-04 | Matsushita Electric Works Ltd | Signal transferring circuit |
-
1979
- 1979-03-12 JP JP2923879A patent/JPS55680A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57197920A (en) * | 1981-05-29 | 1982-12-04 | Matsushita Electric Works Ltd | Signal transferring circuit |
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