CN207218237U - The isolation circuit and computer peripheral of data-interface - Google Patents
The isolation circuit and computer peripheral of data-interface Download PDFInfo
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- CN207218237U CN207218237U CN201721271433.6U CN201721271433U CN207218237U CN 207218237 U CN207218237 U CN 207218237U CN 201721271433 U CN201721271433 U CN 201721271433U CN 207218237 U CN207218237 U CN 207218237U
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- interface
- switching device
- data
- isolation circuit
- stitch
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Abstract
The utility model discloses a kind of isolation circuit of data-interface, including stitch connection end, switching device, the first electric capacity and power connector end；The stitch connection end is used for the data-interface power supply stitch for connecting computer peripheral；The first end of the switching device connects the stitch connection end, and the second end of the switching device connects the power connector end；The control terminal ground connection of the switching device；Voltage difference of the switching device between first end and control terminal turns on when being more than threshold value；The first end of first electric capacity connects the stitch connection end, the second end ground connection of first electric capacity；The power connector end is used for the supply network for connecting the computer peripheral.Correspondingly, the invention also discloses a kind of computer peripheral including the isolation circuit.The utility model realizes the effect for isolating surge current with computer peripheral supply network, prevents surge current from causing to damage to the device of computer peripheral.
Description
Technical field
The utility model embodiment is related to data interface techniques field, more particularly to a kind of isolation circuit of data-interface with
Computer peripheral.
Background technology
With the development of science and technology, increasing computer peripheral using the data-interface for supporting hot plug realize with
Computer interconnection.Hot plug is exactly to allow user to plug data-interface in the case where not closing system, not cutting off the electricity supply.It is but outer
The data-interface of peripheral equipment can produce surge electricity when being plugged on the corresponding interface of computer equipment at the power supply stitch of interface
Stream, the surge current, which enters inside ancillary equipment, to produce impact to control chip or the device of other series connection, cause device to damage
It is bad.
Utility model content
The utility model provides a kind of isolation circuit and computer peripheral of data-interface, prevents that surge is electric to realize
Flow and the device of computer peripheral is caused to damage.
In a first aspect, the utility model embodiment provides a kind of isolation circuit of data-interface, including stitch connection end, open
Close device, the first electric capacity and power connector end；
The stitch connection end is used for the data-interface power supply stitch for connecting computer peripheral；
The first end of the switching device connects the stitch connection end, and the second end of the switching device connects the electricity
Source connection；The control terminal ground connection of the switching device；Voltage difference of the switching device between first end and control terminal
Turned on during more than threshold value；
The first end of first electric capacity connects the stitch connection end, the second end ground connection of first electric capacity；
The power connector end is used for the supply network for connecting the computer peripheral.
Second aspect, the utility model embodiment also provide a kind of computer peripheral, including data-interface, power supply network
The isolation circuit of data-interface described in network and the utility model any embodiment；
The stitch connection end of the isolation circuit connects the power supply stitch of the data-interface；The power supply of the isolation circuit
Connection end connects the supply network.
The utility model embodiment is switched by increasing between the data-interface and supply network of computer peripheral
Device, increase electric capacity at the stitch connection end of connection data-interface power supply stitch so that when data-interface plugs, stitch connects
Connecing the voltage at end will not uprush because of surge current, but be influenceed by capacitor charge and discharge, be slowly increased to turn on derailing switch
The threshold value of part realizes the connection between the power supply stitch of data-interface and the supply network of computer peripheral, solves existing skill
Surge current can cause the technical problem that Tandem devices damage when data during operation interface plugs, and realize surge current and computer
The effect of ancillary equipment supply network isolation, prevents surge current from causing to damage to the device of computer peripheral.
Brief description of the drawings
Fig. 1 is the structural representation of the isolation circuit for the data-interface that the utility model embodiment one provides；
Fig. 2 is the effect diagram of the utility model embodiment one；
Fig. 3 is the structural representation for the computer peripheral that the utility model embodiment two provides.
Embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples.It is understood that herein
Described specific embodiment is used only for explaining the utility model, rather than to restriction of the present utility model.Further need exist for
It is bright, for the ease of description, the part related to the utility model rather than entire infrastructure are illustrate only in accompanying drawing.
Embodiment one
Referring to Fig. 1, Fig. 1 is the structural representation of the isolation circuit for the data-interface that the utility model embodiment one provides,
The isolation circuit includes stitch connection end VBUS1, switching device Q1, the first electric capacity C1 and power connector end VBUS2.Wherein, pin
Pin connection end VBUS1 is used for the data-interface power supply stitch for connecting computer peripheral；Power connector end VBUS2 is used to connect
The supply network of the computer peripheral.
In the prior art, the data-interface power supply stitch of computer peripheral is directly connected to supply network, and
In the present embodiment, switching device Q1 is connected between data-interface power supply stitch and supply network, i.e. the first of switching device Q1
End connection stitch connection end VBUS1, switching device Q1 the second end connection power connector end VBUS2；Switching device Q1 control
End ground connection；Voltage differences of the switching device Q1 between first end and control terminal turns on when being more than threshold value.Because switching device exists
Voltage difference between first end and control terminal turns on when being more than threshold value, therefore, when data-interface inserts computer, due to meter
Calculation machine exports high level, and switching device can turn on.And the first electric capacity C1 first end connection stitch connection end VBUS1, the first electricity
Hold C1 the second end ground connection, therefore, the first electric capacity C1 charge-discharge characteristic can cause data-interface insertion computer to produce surge
During electric current, stitch connection end VBUS1 voltage, which rises, to slow down, and slows down switching device Q1 conducting speed, and reaching reduces surge electricity
The effect of stream.It is the effect diagram of the present embodiment one as shown in Figure 2, wherein U1 is the number of prior art computer ancillary equipment
When being directly connected to according to interface power stitch and supply network, the voltage of the power connector end of supply network is connected, U2 is using this
Stitch connection end VBUS1 voltage after the isolation circuit that embodiment provides, the voltage Uon that dotted line represents are Q1 cut-in voltage,
When U2 is more than Uon, switching device Q1 is just turned on, and now voltage rising edge becomes slow, and having reached reduces surge current
Effect.
As shown in figure 1, switching device Q1 is p-type FET in the present embodiment, switching device Q1 first end is p-type
The source electrode of FET, the second end are the drain electrode of p-type FET, and control terminal is the grid of p-type FET.
It should be noted that the utility model can also use the switching device of other identical functions to substitute p-type field-effect
Pipe.Such as PNP type triode, correspondingly, switching device Q1 first end is the emitter stage of PNP type triode, switching device Q1
The second end be PNP type triode colelctor electrode, switching device Q1 control terminal is the base stage of PNP triode.Or can be with
Substituted with the IC chip including three corresponding ports.
Referring to Fig. 1, the isolation circuit also includes resistance R1, and resistance R1 is connected between electric capacity and ground, and is connected to switch
Between device Q1 control terminal and ground, circuit parameter is conveniently adjusted.
On the basis of above-mentioned technical proposal, isolation circuit also includes the second electric capacity (not indicated in figure), the second electric capacity
First end connects power connector end VBUS2, the second end ground connection of the second electric capacity.Second electric capacity is used to filter out computer peripheral
The noise of supply network, stable power-supplying.
Further, the data-interface is USB interface, and USB interface is widely used hot plug number in the market
According to interface.
In summary, the technical scheme of the present embodiment, the data-interface and supply network in computer peripheral are passed through
Between increase switching device, connection data-interface power supply stitch stitch connection end at increase electric capacity so that work as data-interface
During plug, the voltage of stitch connection end will not uprush because of surge current, but be influenceed by capacitor charge and discharge, be slowly increased
The company between the power supply stitch of data-interface and the supply network of computer peripheral is realized to the threshold value for turning on switching device
Connect, the technical problem that surge current can cause Tandem devices to damage when solving data-interface plug in the prior art, realize wave
The effect that electric current is isolated with computer peripheral supply network is gushed, prevents surge current from being made to the device of computer peripheral
Into damage.
Embodiment two
Referring to Fig. 2, Fig. 2 be the utility model embodiment two provide computer peripheral structural representation, the meter
Calculating peripheral devices includes the data-interface that data-interface 21, supply network 23 and the utility model any embodiment provide
Isolation circuit 22.
Wherein, the power supply stitch VBUS of the stitch connection end connection data-interface 21 of isolation circuit 22；The electricity of isolation circuit
Source connection connects supply network 23.The operation principle of the isolation circuit of reference implementation example one understands that isolation circuit 22 can be realized
When data-interface 21 inserts computer, the connection between data-interface power supply stitch VBUS and supply network 23, and in plug wink
Between, the voltage for slowing down power supply stitch rises, and prevents the device of surge current damage equipment.
As shown in Fig. 2 the data-interface is the interfaces of USB 2.0.Obviously, the present embodiment applies also for connecing using other data
The computer peripheral of mouth, including but not limited to support the interfaces of USB 3.0, HDMI of hot plug etc..
The computer peripheral that the present embodiment provides, can be that wireless throw shields device or video presenter.Nowadays teaching and meeting
View is more to show that flat board auxiliary is carried out using business, and develops and show supporting wireless the throwing screen device or video presenter of flat board with business.
If the device failure of supporting wireless throwing screen device or video presenter, the cost of replacing is higher, and the present embodiment need to only increase by one
Electric capacity and switching device, cost is low but economic benefit is very high.
Certainly, the computer peripheral that the present embodiment provides or the mouse with USB interface, keyboard etc..
The computer peripheral that the present embodiment provides, include the isolation of the data-interface of the utility model embodiment offer
Circuit, possesses corresponding beneficial effect.
It should be noted that in the case of not conflicting, those skilled in the art will can retouch in this specification
The different embodiments or example and the feature of different embodiments or example stated are combined and combined.
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or
Implicitly include at least one this feature.
Pay attention to, above are only preferred embodiment of the present utility model and institute's application technology principle.Those skilled in the art's meeting
Understand, the utility model is not limited to specific embodiment described here, can carried out for a person skilled in the art various bright
Aobvious change, readjust and substitute without departing from the scope of protection of the utility model.Therefore, although passing through above example
The utility model is described in further detail, but the utility model is not limited only to above example, is not departing from
In the case that the utility model is conceived, other more equivalent embodiments can also be included, and the scope of the utility model is by appended
Right determine.
Claims (8)
1. a kind of isolation circuit of data-interface, it is characterised in that including stitch connection end, switching device, the first electric capacity and electricity
Source connection；
The stitch connection end is used for the data-interface power supply stitch for connecting computer peripheral；
The first end of the switching device connects the stitch connection end, and the second end of the switching device connects the power supply and connected
Connect end；The control terminal ground connection of the switching device；Voltage difference of the switching device between first end and control terminal is more than
Turned on during threshold value；
The first end of first electric capacity connects the stitch connection end, the second end ground connection of first electric capacity；
The power connector end is used for the supply network for connecting the computer peripheral.
2. the isolation circuit of data-interface as claimed in claim 1, it is characterised in that the switching device is p-type field-effect
Pipe, the first end of the switching device are the source electrode of p-type FET, and the second end of the switching device is p-type FET
Drain electrode, the control terminal of the switching device is the grid of p-type FET.
3. the isolation circuit of data-interface as claimed in claim 1, it is characterised in that the switching device is the pole of positive-negative-positive three
Pipe, the first end of the switching device are the emitter stage of PNP type triode, and the second end of the switching device is the pole of positive-negative-positive three
The colelctor electrode of pipe, the control terminal of the switching device are the base stage of PNP triode.
4. the isolation circuit of data-interface as claimed in claim 1, it is characterised in that the switching device is ic core
Piece.
5. the isolation circuit of the data-interface as described in any one of Claims 1-4, it is characterised in that the isolation circuit is also
Including the second electric capacity, the first end of second electric capacity connects the power connector end, the second end ground connection of second electric capacity.
6. the isolation circuit of the data-interface as described in any one of Claims 1-4, it is characterised in that the data-interface is
USB interface.
7. a kind of computer peripheral, it is characterised in that including data-interface, supply network and such as claim 1 to 6 times
The isolation circuit of data-interface described in one；
The stitch connection end of the isolation circuit connects the power supply stitch of the data-interface；The power supply connection of the isolation circuit
End connects the supply network.
8. computer peripheral as claimed in claim 7, it is characterised in that the computer peripheral shields for wireless throw
Device or video presenter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721271433.6U CN207218237U (en) | 2017-09-29 | 2017-09-29 | The isolation circuit and computer peripheral of data-interface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721271433.6U CN207218237U (en) | 2017-09-29 | 2017-09-29 | The isolation circuit and computer peripheral of data-interface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207218237U true CN207218237U (en) | 2018-04-10 |
Family
ID=61820046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721271433.6U Active CN207218237U (en) | 2017-09-29 | 2017-09-29 | The isolation circuit and computer peripheral of data-interface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207218237U (en) |
-
2017
- 2017-09-29 CN CN201721271433.6U patent/CN207218237U/en active Active
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