JPS645767B2 - - Google Patents
Info
- Publication number
- JPS645767B2 JPS645767B2 JP8462081A JP8462081A JPS645767B2 JP S645767 B2 JPS645767 B2 JP S645767B2 JP 8462081 A JP8462081 A JP 8462081A JP 8462081 A JP8462081 A JP 8462081A JP S645767 B2 JPS645767 B2 JP S645767B2
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- oscillation
- amplitude
- detected
- transistor
- 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.)
- Expired
Links
- 230000010355 oscillation Effects 0.000 claims description 54
- 238000001514 detection method Methods 0.000 claims description 16
- 239000003990 capacitor Substances 0.000 claims description 8
- 238000000926 separation method Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 description 7
- 239000002184 metal Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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
- H03K17/95—Proximity switches using a magnetic detector
- H03K17/952—Proximity switches using a magnetic detector using inductive coils
- H03K17/9537—Proximity switches using a magnetic detector using inductive coils in a resonant circuit
- H03K17/9542—Proximity switches using a magnetic detector using inductive coils in a resonant circuit forming part of an oscillator
- H03K17/9547—Proximity switches using a magnetic detector using inductive coils in a resonant circuit forming part of an oscillator with variable amplitude
Landscapes
- Electronic Switches (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8462081A JPS57199331A (en) | 1981-06-02 | 1981-06-02 | Proximity switch circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8462081A JPS57199331A (en) | 1981-06-02 | 1981-06-02 | Proximity switch circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57199331A JPS57199331A (en) | 1982-12-07 |
| JPS645767B2 true JPS645767B2 (enrdf_load_stackoverflow) | 1989-01-31 |
Family
ID=13835725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8462081A Granted JPS57199331A (en) | 1981-06-02 | 1981-06-02 | Proximity switch circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57199331A (enrdf_load_stackoverflow) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9178361B2 (en) * | 2012-09-27 | 2015-11-03 | ConvenientPower, Ltd. | Methods and systems for detecting foreign objects in a wireless charging system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5588227A (en) * | 1978-12-26 | 1980-07-03 | Omron Tateisi Electronics Co | Proximity switch |
-
1981
- 1981-06-02 JP JP8462081A patent/JPS57199331A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57199331A (en) | 1982-12-07 |