JPH03111032U - - Google Patents
Info
- Publication number
- JPH03111032U JPH03111032U JP2091490U JP2091490U JPH03111032U JP H03111032 U JPH03111032 U JP H03111032U JP 2091490 U JP2091490 U JP 2091490U JP 2091490 U JP2091490 U JP 2091490U JP H03111032 U JPH03111032 U JP H03111032U
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- resistor
- variable
- output
- capacitor
- 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
- 238000001514 detection method Methods 0.000 claims description 4
- 239000003990 capacitor Substances 0.000 claims 6
- 230000010355 oscillation Effects 0.000 claims 4
- 238000010586 diagram Methods 0.000 description 8
Description
第１図はこの考案の一実施例による近接スイツ
チのブロツク図、第２図はフイルタ６の特性を示
す図、第３図はバリキヤツプＣＶの逆方向電圧と
静電容量の関係を示す図、第４図はバリキヤツプ
ＣＶの温度特性を示す図、第５図は他の実施例に
よる近接スイツチのブロツク図、第６図は他の実
施例におけるフイルタの特性を示す図、第７図は
従来の近接スイツチの動作を説明するための図で
ある。
ＣＶ……バリキヤツプ、Ｌ……検出用コイル、
Ｒ１……可変抵抗、Ｒ２……第１の抵抗、ＲＰＴ
Ｃ……第２の抵抗、ＲＮＴＣ……第２の抵抗。
FIG. 1 is a block diagram of a proximity switch according to an embodiment of this invention, FIG. 2 is a diagram showing the characteristics of the filter 6, FIG. 3 is a diagram showing the relationship between the reverse voltage and capacitance of the variable cap CV, and FIG. Fig. 4 is a diagram showing the temperature characteristics of the variable cap CV, Fig. 5 is a block diagram of a proximity switch according to another embodiment, Fig. 6 is a diagram showing the characteristics of a filter in another embodiment, and Fig. 7 is a diagram showing the conventional proximity switch. FIG. 3 is a diagram for explaining the operation of the switch. CV...varicap, L...detection coil,
R 1 ... variable resistance, R 2 ... first resistance, RPT
C...Second resistance, RNTC...Second resistance.
Claims (1)
タンスを備えた発振回路、 電圧可変コンデンサに印加する逆電圧を調整す
る印加電圧調整回路、 を備え、発振回路の出力に基づき検出出力を出す
よう構成された近接スイツチにおいて、 前記印加電圧調整回路は、第１の抵抗、可変抵
抗、正の温度係数を有する第２の抵抗を直列接続
して基準電圧を印加し、第２の抵抗と可変抵抗に
分圧された電圧を、電圧可変コンデンサの逆電圧
として取り出すようにしたものであることを特徴
とする近接スイツチ。 (2) 電圧可変コンデンサおよび検出用インダク
タンスを備えた発振回路、 電圧可変コンデンサに印加する逆電圧を調整す
る印加電圧調整回路、 を備え、発振回路の出力に基づき検出出力を出す
よう構成された近接スイツチにおいて、 前記印加電圧調整回路は、第１の抵抗、可変抵
抗、負の温度係数を有する第２の抵抗を直列接続
して基準電圧を印加し、第１の抵抗と可変抵抗に
分圧された電圧を、電圧可変コンデンサの逆電圧
として取り出すようにしたものであることを特徴
とする近接スイツチ。[Scope of Claim for Utility Model Registration] (1) An oscillation circuit equipped with a voltage variable capacitor and a detection inductance, an applied voltage adjustment circuit that adjusts the reverse voltage applied to the voltage variable capacitor, and detects based on the output of the oscillation circuit. In the proximity switch configured to output an output, the applied voltage adjustment circuit applies a reference voltage by connecting a first resistor, a variable resistor, and a second resistor having a positive temperature coefficient in series, and applies a reference voltage to the second resistor. A proximity switch characterized in that the voltage divided between a resistor and a variable resistor is taken out as a reverse voltage of a variable voltage capacitor. (2) An oscillation circuit equipped with a voltage variable capacitor and a detection inductance, an applied voltage adjustment circuit that adjusts the reverse voltage applied to the voltage variable capacitor, and a nearby circuit configured to output a detection output based on the output of the oscillation circuit. In the switch, the applied voltage adjustment circuit applies a reference voltage by connecting a first resistor, a variable resistor, and a second resistor having a negative temperature coefficient in series, and divides the voltage between the first resistor and the variable resistor. A proximity switch characterized in that the voltage is extracted as a reverse voltage of a variable voltage capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2091490U JPH03111032U (en) | 1990-02-28 | 1990-02-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2091490U JPH03111032U (en) | 1990-02-28 | 1990-02-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03111032U true JPH03111032U (en) | 1991-11-14 |
Family
ID=31523997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2091490U Pending JPH03111032U (en) | 1990-02-28 | 1990-02-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03111032U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010240316A (en) * | 2009-04-09 | 2010-10-28 | Masahiro Shirakawa | Supporter for joint |
-
1990
- 1990-02-28 JP JP2091490U patent/JPH03111032U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010240316A (en) * | 2009-04-09 | 2010-10-28 | Masahiro Shirakawa | Supporter for joint |
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