CN201114192Y - Circuit apparatus for eliminating retail terminal microphone press key jiggle - Google Patents
Circuit apparatus for eliminating retail terminal microphone press key jiggle Download PDFInfo
- Publication number
- CN201114192Y CN201114192Y CNU2007200287257U CN200720028725U CN201114192Y CN 201114192 Y CN201114192 Y CN 201114192Y CN U2007200287257 U CNU2007200287257 U CN U2007200287257U CN 200720028725 U CN200720028725 U CN 200720028725U CN 201114192 Y CN201114192 Y CN 201114192Y
- Authority
- CN
- China
- Prior art keywords
- monostable flipflop
- retail terminal
- eliminating
- terminal microphone
- jiggle
- 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 - Fee Related
Links
- 241000208125 Nicotiana Species 0.000 description 6
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 6
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 206010044565 Tremor Diseases 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
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Abstract
The utility model provides a circuit device, in particular a circuit device for removing the microphone key-press dithering in a retail terminal; a structure of the utility model comprises a monoflop LS which is respectively connected with interrupted pins Y1 and Y2 through output pins 1Q and 2Q; the other end of the monoflop LS is respectively connected with a resistor R and a switch S. Compared with the prior art, the circuit device for removing the microphone key-press dithering in the retail terminal has the characteristics of reasonable design, a simple structure, stable operation, low fabricating cost, etc.
Description
Technical field
The utility model relates to a kind of circuit, and a kind of circuit arrangement of eliminating retail terminal microphone key jitter specifically is provided.
Background technology
Under the prior art, integrated telephony feature in the wireless tobacco retail terminal, generally speaking, phone is in idle condition, and liquid crystal interface is in tobacco retail state, connects or when making a phone call, microphone is mentioned, and the interface just enters the telephone relation interface.Finish after the conversation, microphone puts down, and the interface just enters tobacco retail state.But when microphone was mentioned or put down, the microphone button can produce shake, and the shake time, 10～20ms was kept in big appointment, and the shake of button can make liquid crystal interface switch back and forth at telephone relation interface and tobacco retail interface, influenced the stable of system.
Summary of the invention
A kind of circuit arrangement of eliminating retail terminal microphone key jitter of the present utility model has reasonable in design, simple in structure, working stability, characteristics that cost of manufacture is low.
In the tobacco retail terminal, the telephone microphone button press and the state of upspringing all needs to disappear to tremble, and the more important thing is, press and the state of upspringing needs the sudden change of level at button, both when pressing, button needed level to be mutated into low level by high level, and button need be mutated into high level by low level when upspringing, and makes level state be approximated to square wave, could guarantee the telephony feature operate as normal of tobacco retail terminal like this.Because arrive such effect more complicated, we solve this problem with the method for an accommodation, by produce a square-wave pulse when pressing, the mode that also produces a square-wave pulse when upspringing obtains.
Button is pressed up to level equalization after low level, produces a square-wave pulse.
After button is upspring, maintain high level, also produce a square-wave pulse up to level.
The technical scheme that its technical problem that solves the utility model adopts is:
A kind of circuit arrangement of eliminating retail terminal microphone key jitter comprises monostable flipflop LS, and described monostable flipflop LS is connected interrupt pin Y1 and Y2 by output pin 1Q respectively with 2Q, and the monostable flipflop LS other end connects resistance R and switch S respectively.
Monostable flipflop LS comprises monostable flipflop LS1 and monostable flipflop LS2, and described monostable flipflop LS1 is in parallel by pin 1A and 2A with monostable flipflop LS2.
When button was pressed, the output of LS1 can be exported a high level at once, when key jitter, as long as the time of double pump, output will keep high level less than a set time, only after shake is at interval greater than a set time, output just can become low level, and the time interval of key jitter can be less than this time interval, so last effect is, when button is pressed, the output of LS1 can become high level at once, and only after shake disappeared, output just can become low level.Like this, when button was pressed, the output of LS1 can produce a stable high pulse signal.In like manner, when button was upspring, LS2 produced a stable high pulse signal equally.So just solved the problem of shake.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is a kind of circuit theory diagrams of eliminating the circuit arrangement of retail terminal microphone key jitter.
Embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments, but not as to qualification of the present utility model.
Provide a most preferred embodiment below:
A kind of circuit arrangement of eliminating retail terminal microphone key jitter comprises monostable flipflop LS, and described monostable flipflop LS is connected interrupt pin Y1 and Y2 by output pin 1Q respectively with 2Q, and the monostable flipflop LS other end connects resistance R and switch S respectively.
Monostable flipflop LS comprises monostable flipflop LS1 and monostable flipflop LS2, and described monostable flipflop LS1 is in parallel by pin 1A and 2A with monostable flipflop LS2.
Above-described embodiment, the utility model embodiment a kind of more preferably just, the common variation that those skilled in the art carries out in the technical solutions of the utility model scope and replacing all should be included in the protection range of the present utility model.
Claims (2)
1, a kind of circuit arrangement of eliminating retail terminal microphone key jitter, comprise monostable flipflop LS, it is characterized in that described monostable flipflop LS is connected interrupt pin Y1 and Y2 by output pin 1Q respectively with 2Q, the monostable flipflop LS other end connects resistance R and switch S respectively.
2, a kind of circuit arrangement of eliminating retail terminal microphone key jitter according to claim 1, it is characterized in that, described monostable flipflop LS comprises monostable flipflop LS1 and monostable flipflop LS2, and described monostable flipflop LS1 is in parallel by pin 1A and 2A with monostable flipflop LS2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200287257U CN201114192Y (en) | 2007-10-12 | 2007-10-12 | Circuit apparatus for eliminating retail terminal microphone press key jiggle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200287257U CN201114192Y (en) | 2007-10-12 | 2007-10-12 | Circuit apparatus for eliminating retail terminal microphone press key jiggle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201114192Y true CN201114192Y (en) | 2008-09-10 |
Family
ID=39965941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200287257U Expired - Fee Related CN201114192Y (en) | 2007-10-12 | 2007-10-12 | Circuit apparatus for eliminating retail terminal microphone press key jiggle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201114192Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102540940A (en) * | 2011-12-23 | 2012-07-04 | 四川泛华电器有限责任公司 | Switch dither eliminating system and switch dither eliminating method |
-
2007
- 2007-10-12 CN CNU2007200287257U patent/CN201114192Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102540940A (en) * | 2011-12-23 | 2012-07-04 | 四川泛华电器有限责任公司 | Switch dither eliminating system and switch dither eliminating method |
| CN102540940B (en) * | 2011-12-23 | 2013-12-04 | 四川泛华电器有限责任公司 | Switch dither eliminating system and switch dither eliminating method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080910 Termination date: 20101012 |