CN203775155U - USB anti-interference system - Google Patents
USB anti-interference system Download PDFInfo
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- CN203775155U CN203775155U CN201320890242.3U CN201320890242U CN203775155U CN 203775155 U CN203775155 U CN 203775155U CN 201320890242 U CN201320890242 U CN 201320890242U CN 203775155 U CN203775155 U CN 203775155U
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Abstract
The utility model provides a USB anti-interference system comprising a USB electric signal input interface module. The USB anti-interference system is characterized in that the USB anti-interference system is also provided with an electric signal filtering module which is used for filtering an electric signal inputted by the USB electric signal input interface module; a high-voltage and electrostatic protection module which is used for protecting the electric signal outputted by the electric signal filtering module from being influenced by external electrostatic and high-voltage interference; an electromagnetic interference filtering module which is used for filtering high-frequency electromagnetic wave on the electric signal; and a high-frequency signal interference inhibition module which is used for inhibiting an output signal of the electromagnetic interference filtering module and reducing high-frequency noise and peak interference of the electric signal. The USB anti-interference system is simple in structure and high in reliability so that stability of the system can be effectively enhanced and external interference can be prevented.
Description
Technical field
The utility model relates to a kind of USB anti-interference system, and particularly a kind of reliability is high, and practicality can effectively improve the USB anti-interference system of the stability of a system.
Background technology
Along with scientific and technological development; system is more and more intensive; integrated level is more and more higher; it is responsive that interference to external world also becomes, the Anti-interference Design to USB circuit especially, and the utility model can be to high-frequency noise; the interference such as frequency electromagnetic waves suppress; and can be to high voltage, electrostatic interference is put up a resistance, and can be good at protecting main system unaffected.
Summary of the invention
Technical problem to be solved in the utility model is, proposed a kind of feature richness, simplicity of design, and it is convenient to control, wireless controller cheaply, particularly a kind of reliability is high, practical USB anti-interference system.。
The technical scheme that the utility model adopts is: a kind of USB anti-interference system, comprise USB signal of telecommunication input interface module, it is characterized in that: be also provided with: signal of telecommunication filtration module, for the signal of telecommunication of USB signal of telecommunication input interface module input is carried out to filtering; High voltage, electrostatic protection module, unaffected when being subject to extraneous static, high voltage interference for the protection of the signal of telecommunication of signal of telecommunication filtration module output; Filter electromagnetic interference module, for the frequency electromagnetic waves on filtered electrical signal; Suppress high-frequency signal interference module, for suppressing to filter the output signal of electromagnetic interference module, the high-frequency noise and the spike that reduce the signal of telecommunication disturb;
Described inhibition high-frequency signal interference module, P1 is USB interface, the a end of magnetic bead L1 is connected with 2 pins of USB interface, b end is connected with 1 pin of common mode inductance L 2, the a end of magnetic bead L5 is connected with 3 pins of USB interface, b end is connected with 2 pins of common mode inductance L 2, realize High frequency filter, for suppressing the High-frequency Interference of the USB signal of telecommunication, the a end of magnetic bead L3 is connected with 4 pins of USB interface, b end is connected with a end of resistance R 8, the a end of magnetic bead L4 is connected with 1 pin of USB interface, b end is connected to the ground, for the high-frequency noise producing on power line and most advanced and sophisticated interference are well suppressed, the a end of resistance R 5 is connected with 4 pins of common mode inductance L 2, b termination enters signal input line, the a end of resistance R 11 is connected with 3 pins of common mode inductance L 2, b termination enters signal input line, for suppression loop electric current, noise is inhibited,
Described filtration electromagnetic interference module, 1 pin of common mode inductance L2 is connected with the b of magnetic bead L1 end, and 2 pins are connected with the b end of magnetic bead L5, and 3 pins are connected with a end of resistance R 11, the a end of 4 pins and resistance R 5 is connected, the interference for the electromagnetic wave that suppresses high-frequency signal generation to the USB signal of telecommunication;
Described high voltage, electrostatic protection module, the a end of transient diode Di1 is connected with 2 pins of USB interface, b end is connected with shell, the a end of transient diode Di3 is connected with 3 pins of USB interface, b end is connected with shell, the a end of resistance R 6 is connected with shell, b end is connected to the ground, the a end of capacitor C 4 is connected with shell, b end is connected to the ground, for stopping the interference of the extraneous high voltage causing due to reasons such as static to the USB signal of telecommunication, the a end of transient diode Di2 is connected with 4 pins of USB interface, b end is connected with shell, for the protection of the signal of telecommunication, be not subject to high-tension interference,
Described signal of telecommunication filtration module, a end of capacitor C 7 is connected with a end of resistance R 8, and b end is connected to the ground, the a end of resistance R 10 is connected with a end of resistance R 8, and b end is connected to the ground, and a end of capacitor C 6 is connected with a end of resistance R 8, b end is connected to the ground, and the signal of telecommunication is reached to filter action.
A kind of USB anti-interference system of the present utility model, is to carry out circuit design with simple circuit and electronic devices and components, realizes signal of telecommunication filtering, high voltage, electrostatic protection, the filtration electromagnetic interference of USB interface and suppresses the function that high-frequency signal disturbs.This USB anti-interference system cost is low, and function is strong, and successful is used simply, and can increase work efficiency, for USB anti-interference system provides a kind of new equipment scheme.
Accompanying drawing explanation
Fig. 1 is USB anti-interference system structured flowchart;
Fig. 2 is circuit system schematic diagram;
Wherein:
1. suppress high-frequency signal interference module
2. filter electromagnetic interference module
3. high voltage, electrostatic protection module
4. signal of telecommunication filtration module
5.USB signal of telecommunication input interface module
Embodiment
Below in conjunction with embodiment and accompanying drawing, a kind of USB anti-interference system of the present utility model is described in detail.
As shown in Figure 1, a kind of USB anti-interference system of the utility model, comprises USB signal of telecommunication input interface module 5, it is characterized in that: be also provided with: signal of telecommunication filtration module 4, for the signal of telecommunication of USB signal of telecommunication input interface module 5 inputs is carried out to filtering; High voltage, electrostatic protection module 3, unaffected when being subject to extraneous static, high voltage interference for the protection of the signal of telecommunication of signal of telecommunication filtration module 4 outputs; Filter electromagnetic interference module 2, for the frequency electromagnetic waves on filtered electrical signal; Suppress high-frequency signal interference module 1, for suppressing to filter the output signal of electromagnetic interference module 2, the high-frequency noise and the spike that reduce the signal of telecommunication disturb;
As shown in Figure 2, described inhibition high-frequency signal interference module 1 includes USB interface P1, the a end of magnetic bead L1 is connected with 2 pins of USB interface, b end is connected with 1 pin of common mode inductance L 2, the a end of magnetic bead L5 is connected with 3 pins of USB interface, b end is connected with 2 pins of common mode inductance L 2, realize High frequency filter, for suppressing the High-frequency Interference of the USB signal of telecommunication, the a end of magnetic bead L3 is connected with 4 pins of USB interface, b end is connected with a end of resistance R 8, the a end of magnetic bead L4 is connected with 1 pin of USB interface, b end is connected to the ground, for the high-frequency noise producing on power line and most advanced and sophisticated interference are well suppressed, the a end of resistance R 5 is connected with 4 pins of common mode inductance L 2, b termination enters signal input line, the a end of resistance R 11 is connected with 3 pins of common mode inductance L 2, b termination enters signal input line, for suppression loop electric current, noise is inhibited,
As shown in Figure 2, described filtration electromagnetic interference module 2,1 pin of common mode inductance L2 is connected with the b of magnetic bead L1 end, 2 pins are connected with the b end of magnetic bead L5,3 pins are connected with a end of resistance R 11, the a end of 4 pins and resistance R 5 is connected, the interference for the electromagnetic wave that suppresses high-frequency signal generation to the signal of telecommunication;
As shown in Figure 2, described high voltage, electrostatic protection module 3, the a end of transient diode Di1 is connected with 2 pins of USB interface, b end is connected with shell, the a end of transient diode Di3 is connected with 3 pins of USB interface, b end is connected with shell, the a end of resistance R 6 is connected with shell, b end is connected to the ground, the a end of capacitor C 4 is connected with shell, b end is connected to the ground, for stopping the interference of the extraneous high voltage causing due to reasons such as static to the USB signal of telecommunication, the a end of transient diode Di2 is connected with 4 pins of USB interface, b end is connected with shell, for the protection of the signal of telecommunication, be not subject to high-tension interference.
As shown in Figure 2, described signal of telecommunication filtration module 4, the a end of capacitor C 7 is connected with a end of resistance R 8, and b end is connected to the ground, and a end of resistance R 10 is connected with a end of resistance R 8, b end is connected to the ground, the a end of capacitor C 6 is connected with a end of resistance R 8, and b end is connected to the ground, and power supply is reached to filter action, the signal of telecommunication is added stable, reliable.
A kind of USB anti-interference system of the present utility model; realized signal of telecommunication filtering, high voltage, electrostatic protection, the filtration electromagnetic interference of USB interface and suppressed the function that high-frequency signal disturbs; this system adopts modularized design; cost is low; function is strong; successful, use simple, for the lifting of the anti-tampering function of USB provides a kind of new equipment scheme.
Claims (1)
1. a USB anti-interference system, comprises USB signal of telecommunication input interface module (5), it is characterized in that: be also provided with: signal of telecommunication filtration module (4), for the signal of telecommunication of USB signal of telecommunication input interface module (5) input is carried out to filtering, high voltage, electrostatic protection module (3), unaffected when being subject to extraneous static, high voltage interference for the protection of the signal of telecommunication of signal of telecommunication filtration module (4) output, filter electromagnetic interference module (2), for the frequency electromagnetic waves on filtered electrical signal, suppress high-frequency signal interference module (1), for suppressing to filter the output signal of electromagnetic interference module (2), the high-frequency noise and the spike that reduce the signal of telecommunication disturb, described inhibition high-frequency signal interference module (1), P1 is USB interface, the a end of magnetic bead L1 is connected with 2 pins of USB interface, b end is connected with 1 pin of common mode inductance L 2, the a end of magnetic bead L5 is connected with 3 pins of USB interface, b end is connected with 2 pins of common mode inductance L 2, realize High frequency filter, for suppressing the High-frequency Interference of the signal of telecommunication, the a end of magnetic bead L3 is connected with 4 pins of USB interface, b end is connected with a end of resistance R 8, the a end of magnetic bead L4 is connected with 1 pin of USB interface, b end is connected to the ground, for the high-frequency noise producing on power line and most advanced and sophisticated interference are well suppressed, the a end of resistance R 5 is connected with 4 pins of common mode inductance L 2, b termination enters signal input line, the a end of resistance R 11 is connected with 3 pins of common mode inductance L 2, b termination enters signal input line, for suppression loop electric current, noise is inhibited, described high voltage, electrostatic protection module (3), the a end of transient diode Di1 is connected with 2 pins of USB interface, b end is connected with shell, the a end of transient diode Di3 is connected with 3 pins of USB interface, b end is connected with shell, the a end of resistance R 6 is connected with shell, b end is connected to the ground, the a end of capacitor C 4 is connected with shell, b end is connected to the ground, for stopping the interference of the extraneous high voltage causing due to reasons such as static to the signal of telecommunication, the a end of transient diode Di2 is connected with 4 pins of USB interface, b end is connected with shell, for the protection of the signal of telecommunication, be not subject to high-tension interference, described signal of telecommunication filtration module (4), a end of capacitor C 7 is connected with a end of resistance R 8, and b end is connected to the ground, the a end of resistance R 10 is connected with a end of resistance R 8, and b end is connected to the ground, and a end of capacitor C 6 is connected with a end of resistance R 8, b end is connected to the ground, and the signal of telecommunication is reached to filter action.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320890242.3U CN203775155U (en) | 2013-12-31 | 2013-12-31 | USB anti-interference system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320890242.3U CN203775155U (en) | 2013-12-31 | 2013-12-31 | USB anti-interference system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203775155U true CN203775155U (en) | 2014-08-13 |
Family
ID=51292300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320890242.3U Expired - Fee Related CN203775155U (en) | 2013-12-31 | 2013-12-31 | USB anti-interference system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203775155U (en) |
-
2013
- 2013-12-31 CN CN201320890242.3U patent/CN203775155U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140813 Termination date: 20141231 |
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| EXPY | Termination of patent right or utility model |