CN206211969U - A kind of anti-jamming circuit of touch key-press - Google Patents
A kind of anti-jamming circuit of touch key-press Download PDFInfo
- Publication number
- CN206211969U CN206211969U CN201621346614.6U CN201621346614U CN206211969U CN 206211969 U CN206211969 U CN 206211969U CN 201621346614 U CN201621346614 U CN 201621346614U CN 206211969 U CN206211969 U CN 206211969U
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- CN
- China
- Prior art keywords
- press
- touch key
- controller
- signal
- touch
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- 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 - Fee Related
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Abstract
The utility model provides a kind of anti-jamming circuit of touch key-press, including touch key-press and controller, and the controller is built-in with analog-digital converter, and the touch key-press is connected by coaxial cable with the analog-digital converter input pin of the controller.With the analog-digital converter of controller be directly connected to touch key-press using coaxial cable by the utility model, and the touch signal that will collect of electric capacity change-over circuit need not be passed through and be converted into data signal and be sent to controller again being processed, increase RC anti-jamming circuits without in controller periphery, effectively prevent touch signal is influenceed during transmission by AC signal and electromagnetic interference signal, improves the accuracy of touch key-press touch signal detection.
Description
Technical field
The utility model is related to touch screen technology field, more particularly to a kind of anti-jamming circuit of touch key-press.
Background technology
Fingerprint electricity getting device triggers system typically by touch key-press and carries out fingerprint authentication and the operation of power taking pre-authorization,
The collection of common touch key-press signal is mainly converted to digital signal circuit by CDC electric capacity, that is, need to be touched by special
Touch the trigger signal that IC will detect and be converted to data signal, processor is processed received digital signal again, cost
It is higher.Also, when touch key-press is nearer apart from AC signal, easily influenceed by AC signal and electromagnetic interference signal and
Cause the false triggering of touch key-press.
Utility model content
The utility model provides a kind of anti-jamming circuit of touch key-press, improves the accuracy of touch key-press detection.
The utility model uses following technical scheme：
The utility model provides a kind of anti-jamming circuit of touch key-press, including touch key-press and controller, the control
Device is built-in with analog-digital converter, and the touch key-press is connected by coaxial cable with the analog-digital converter input pin of the controller
Connect.
Specifically, the controller is Atmel SAM D20E controllers, and the touch key-press passes through coaxial cable and institute
State the QTouch interfaces connection of Atmel SAM D20E controllers.
The technical scheme that the utility model is provided brings following beneficial effect：
Touch key-press is directly connected to the analog-digital converter of controller using coaxial cable, and without being changed by electric capacity
The touch signal that circuit will be collected is converted into data signal and is sent to controller again being processed, without in controller periphery
Increase RC anti-jamming circuits, effectively prevent touch signal and AC signal and electromagnetic interference signal are subject to during transmission
Influence, improves the accuracy of touch key-press touch signal detection.
Brief description of the drawings
In order to illustrate more clearly of the technical scheme in the utility model embodiment, below will be to the utility model embodiment
The accompanying drawing to be used needed for description is briefly described, it should be apparent that, drawings in the following description are only new this practicality
Some embodiments of type, for those of ordinary skill in the art, on the premise of not paying creative work, can be with root
Other accompanying drawings are obtained according to the content and these accompanying drawings of the utility model embodiment.
Fig. 1 is the block diagram of one embodiment of the anti-jamming circuit of the touch key-press that the utility model is provided.
Fig. 2 is second block diagram of embodiment of the anti-jamming circuit of the touch key-press that the utility model is provided.
Specific embodiment
It is that the technical problem for solving the utility model, the technical scheme for using and the technique effect for reaching are clearer,
The technical scheme of the utility model embodiment is described in further detail below in conjunction with accompanying drawing, it is clear that described reality
Example only a part of embodiment of the utility model is applied, rather than whole embodiments.Based on the embodiment in the utility model,
The every other embodiment that those skilled in the art are obtained under the premise of creative work is not made, belongs to this practicality new
The scope of type protection.
Fig. 1 is the block diagram of one embodiment of the anti-jamming circuit of the touch key-press that the utility model is provided.
With reference to shown in Fig. 1, the utility model provides a kind of anti-jamming circuit of touch key-press includes touch key-press 1 and controller 2, institute
State controller 2 and be built-in with analog-digital converter 20, the touch key-press 1 passes through the analog-to-digital conversion of coaxial cable 3 and the controller 2
The input pin of device 20 is connected.
The anti-jamming circuit of the touch key-press that the utility model is provided uses coaxial cable by touch key-press and controller
Analog-digital converter is directly connected to, and the touch signal that need not will be collected by electric capacity change-over circuit is converted into data signal and passed again
It is sent to controller to be processed, RC anti-jamming circuits is increased without in controller periphery, effectively prevent touch signal and passing
Influenceed by AC signal and electromagnetic interference signal in defeated process, improve the accurate of touch key-press touch signal detection
Property.
Fig. 2 is second block diagram of embodiment of the anti-jamming circuit of the touch key-press that the utility model is provided.
With reference to shown in Fig. 2, in the present embodiment, controller 2 selects Atmel SAM D20E controllers, and the touch key-press 1 is by coaxial
Cable 3 is connected with the QTouch interfaces 21 of the Atmel SAM D20E controllers 2.
Atmel SAM D20E controllers have low-power consumption, flexible peripheral hardware and Atmel QTouch peripheral hardware touch controllers
Many advantages, such as.
The anti-jamming circuit of the touch key-press that the utility model is provided uses coaxial cable by touch key-press and controller
QTouch interfaces are directly connected to, the built in hardware needed for can providing button, scroll bar, roller and Proximity operation, support interaction
With self capacitance touching control, and without outer member, effectively prevent touch signal and AC signal is subject to during transmission
With the influence of electromagnetic interference signal, the accuracy of touch key-press touch signal detection is improve.
Above content is only preferred embodiment of the present utility model, for one of ordinary skill in the art, according to this reality
With new thought, will change in specific embodiments and applications, this specification content should not be construed as
To limitation of the present utility model.
Claims (2)
1. a kind of anti-jamming circuit of touch key-press, it is characterised in that including touch key-press and controller, the controller is built-in
There is analog-digital converter, the touch key-press is connected by coaxial cable with the analog-digital converter input pin of the controller.
2. the anti-jamming circuit of touch key-press according to claim 1, it is characterised in that the controller is Atmel
SAM D20E controllers, the touch key-press passes through the QTouch interfaces of coaxial cable and the Atmel SAM D20E controllers
Connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621346614.6U CN206211969U (en) | 2016-12-08 | 2016-12-08 | A kind of anti-jamming circuit of touch key-press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621346614.6U CN206211969U (en) | 2016-12-08 | 2016-12-08 | A kind of anti-jamming circuit of touch key-press |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206211969U true CN206211969U (en) | 2017-05-31 |
Family
ID=58746419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621346614.6U Expired - Fee Related CN206211969U (en) | 2016-12-08 | 2016-12-08 | A kind of anti-jamming circuit of touch key-press |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206211969U (en) |
-
2016
- 2016-12-08 CN CN201621346614.6U patent/CN206211969U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170531 Termination date: 20211208 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |