JPS5799032A - Alternating current two-wire type contactless switch - Google Patents
Alternating current two-wire type contactless switchInfo
- Publication number
- JPS5799032A JPS5799032A JP17482380A JP17482380A JPS5799032A JP S5799032 A JPS5799032 A JP S5799032A JP 17482380 A JP17482380 A JP 17482380A JP 17482380 A JP17482380 A JP 17482380A JP S5799032 A JPS5799032 A JP S5799032A
- Authority
- JP
- Japan
- Prior art keywords
- turns
- detection circuit
- voltage
- capacitor
- alternating current
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/945—Proximity switches
Landscapes
- Electronic Switches (AREA)
- Thyristor Switches And Gates (AREA)
Abstract
PURPOSE:To use a driving power supply eficiently, by floating a constant voltage circuit supplying the power supply to a detection circuit, when the output of the detection circuit is present. CONSTITUTION:When an output of a detection circuit S becomes from high to low level, a transistor (TR)Q2 turns off and a constant voltage circuit 3 is in floating state While the instantaneous value of the output of a rectifier 9 is small, a Zener diode Z2 is nonconductive, the thyristor 2 turns off, a capacitor C1 is charged with a voltage at a point D during this period, and a power supply is applied to the detection circuit S. When an instantaneous value is greater, the diode Z2 turns on and the thyristor 2 turns on, allowing to lower the voltage at point F. when the voltage of the capacitor C1 decreases, the diode Z2 turns off and the capacitor C1 is again charged.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17482380A JPS609371B2 (en) | 1980-12-11 | 1980-12-11 | AC 2-wire non-contact switch |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17482380A JPS609371B2 (en) | 1980-12-11 | 1980-12-11 | AC 2-wire non-contact switch |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5799032A true JPS5799032A (en) | 1982-06-19 |
JPS609371B2 JPS609371B2 (en) | 1985-03-09 |
Family
ID=15985281
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17482380A Expired JPS609371B2 (en) | 1980-12-11 | 1980-12-11 | AC 2-wire non-contact switch |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS609371B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63160412A (en) * | 1986-12-23 | 1988-07-04 | Keyence Corp | Contactless two-wire ac switch |
JPS63160413A (en) * | 1986-12-23 | 1988-07-04 | Keyence Corp | Contactless two-wire ac switch |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63292869A (en) * | 1987-05-26 | 1988-11-30 | Canon Inc | Image reader |
-
1980
- 1980-12-11 JP JP17482380A patent/JPS609371B2/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63160412A (en) * | 1986-12-23 | 1988-07-04 | Keyence Corp | Contactless two-wire ac switch |
JPS63160413A (en) * | 1986-12-23 | 1988-07-04 | Keyence Corp | Contactless two-wire ac switch |
Also Published As
Publication number | Publication date |
---|---|
JPS609371B2 (en) | 1985-03-09 |
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