JPS57152730A - Proximity switch circuit - Google Patents
Proximity switch circuitInfo
- Publication number
- JPS57152730A JPS57152730A JP4138381A JP4138381A JPS57152730A JP S57152730 A JPS57152730 A JP S57152730A JP 4138381 A JP4138381 A JP 4138381A JP 4138381 A JP4138381 A JP 4138381A JP S57152730 A JPS57152730 A JP S57152730A
- Authority
- JP
- Japan
- Prior art keywords
- level
- detecting member
- polygonal line
- detecting
- point
- 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
- H03K17/94—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)
Abstract
PURPOSE:To prevent the occurrence of chattering, by giving the characteristic having a polygonal line to the negative conductance of an oscillating circuit and detecting approach of a detecting member in the level before the polygonal line and detecting going-away of the detecting member in the level of the polygonal line. CONSTITUTION:Since a nonlinear circuit 20 has such characteristic that the gain is 1 for an input voltage equal to and smaller than VZ and a constant value of VZ is outputted for an input voltage larger than VZ, the negative conductance at the view from a point A shows a polygonal line at the point of VZ. When a detecting member approaches resonance circuits 4 and 5, the oscillation output is small, and the nonlinear circuit 20 is operated in the linear region, and a transistor TR is turned off. Consequently, the reference voltage of a comparing circuit becomes a level higher than VZ at the bend point, and this level is inverted when the detecting member goes away. Until the detecting member approaches, the TR16 is turned on, and the level of the reference voltage is lower than VZ; and this level is inverted when the detecting member approaches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4138381A JPS57152730A (en) | 1981-03-17 | 1981-03-17 | Proximity switch circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4138381A JPS57152730A (en) | 1981-03-17 | 1981-03-17 | Proximity switch circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57152730A true JPS57152730A (en) | 1982-09-21 |
Family
ID=12606864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4138381A Pending JPS57152730A (en) | 1981-03-17 | 1981-03-17 | Proximity switch circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57152730A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6434015A (en) * | 1987-07-07 | 1989-02-03 | Ifm Electronic Gmbh | Electronic switching device with non-contact operation |
| JP2008140732A (en) * | 2006-12-05 | 2008-06-19 | Osaka Titanium Technologies Co Ltd | High current circuit breaker |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5046950A (en) * | 1973-08-31 | 1975-04-26 | ||
| JPS5519771A (en) * | 1978-07-31 | 1980-02-12 | Omron Tateisi Electronics Co | Ocillating circuit for proximity switch |
-
1981
- 1981-03-17 JP JP4138381A patent/JPS57152730A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5046950A (en) * | 1973-08-31 | 1975-04-26 | ||
| JPS5519771A (en) * | 1978-07-31 | 1980-02-12 | Omron Tateisi Electronics Co | Ocillating circuit for proximity switch |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6434015A (en) * | 1987-07-07 | 1989-02-03 | Ifm Electronic Gmbh | Electronic switching device with non-contact operation |
| JP2008140732A (en) * | 2006-12-05 | 2008-06-19 | Osaka Titanium Technologies Co Ltd | High current circuit breaker |
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