FR2252704A1 - Contact switching circuit - has an oscillator with a sensor which, when touched by the operator, changes the oscillation amplitude - Google Patents
Contact switching circuit - has an oscillator with a sensor which, when touched by the operator, changes the oscillation amplitudeInfo
- Publication number
- FR2252704A1 FR2252704A1 FR7439950A FR7439950A FR2252704A1 FR 2252704 A1 FR2252704 A1 FR 2252704A1 FR 7439950 A FR7439950 A FR 7439950A FR 7439950 A FR7439950 A FR 7439950A FR 2252704 A1 FR2252704 A1 FR 2252704A1
- Authority
- FR
- France
- Prior art keywords
- oscillator
- sensor
- touched
- oscillation amplitude
- operator
- 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
- H03K17/96—Touch switches
- H03K17/962—Capacitive touch switches
Landscapes
- Electronic Switches (AREA)
- Relay Circuits (AREA)
Abstract
An amplitude-voltage converter is connected to the oscillator and delivers an output signal which reproduces the oscillator amplitude. An integrated circuit has a reference input and an input for the converter, delivering an output signal when the sensor is touched. A relay, operated by the output pulses, has a two-way contact changing its position every time a pulse is applied to the relay. The oscillator has a transistor with a tuned circuit in its control electrode circuit, and with a feed-back between its collector and tuned circuit. The sensor is connected to the transistor control electrode, so that touching the sensor is equivalent to an increase of the capacitance which connects the control electrode to earth, so that the oscillation amplitude is reduced.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5511973 | 1973-11-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2252704A1 true FR2252704A1 (en) | 1975-06-20 |
| FR2252704B1 FR2252704B1 (en) | 1977-03-25 |
Family
ID=10473018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7439950A Granted FR2252704A1 (en) | 1973-11-28 | 1974-11-25 | Contact switching circuit - has an oscillator with a sensor which, when touched by the operator, changes the oscillation amplitude |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS5084874A (en) |
| AU (1) | AU7536374A (en) |
| DE (1) | DE2455956A1 (en) |
| ES (1) | ES432240A1 (en) |
| FR (1) | FR2252704A1 (en) |
| IN (1) | IN139305B (en) |
| IT (1) | IT1023401B (en) |
-
1974
- 1974-11-14 AU AU75363/74A patent/AU7536374A/en not_active Expired
- 1974-11-15 IN IN2522/CAL/74A patent/IN139305B/en unknown
- 1974-11-25 FR FR7439950A patent/FR2252704A1/en active Granted
- 1974-11-25 ES ES432240A patent/ES432240A1/en not_active Expired
- 1974-11-26 IT IT5422474A patent/IT1023401B/en active
- 1974-11-26 JP JP13524474A patent/JPS5084874A/ja active Pending
- 1974-11-27 DE DE19742455956 patent/DE2455956A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| IT1023401B (en) | 1978-05-10 |
| IN139305B (en) | 1976-05-29 |
| AU7536374A (en) | 1976-05-20 |
| FR2252704B1 (en) | 1977-03-25 |
| JPS5084874A (en) | 1975-07-09 |
| ES432240A1 (en) | 1976-11-01 |
| DE2455956A1 (en) | 1975-06-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |