CN107317134A - USB attachment means, USB fabric and terminal - Google Patents
USB attachment means, USB fabric and terminal Download PDFInfo
- Publication number
- CN107317134A CN107317134A CN201710525607.5A CN201710525607A CN107317134A CN 107317134 A CN107317134 A CN 107317134A CN 201710525607 A CN201710525607 A CN 201710525607A CN 107317134 A CN107317134 A CN 107317134A
- Authority
- CN
- China
- Prior art keywords
- impedance
- inductance
- matching device
- usb
- pcb
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/6608—Structural association with built-in electrical component with built-in single component
- H01R13/6633—Structural association with built-in electrical component with built-in single component with inductive component, e.g. transformer
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
- H01R12/70—Coupling devices
- H01R12/71—Coupling devices for rigid printing circuits or like structures
- H01R12/712—Coupling devices for rigid printing circuits or like structures co-operating with the surface of the printed circuit or with a coupling device exclusively provided on the surface of the printed circuit
- H01R12/716—Coupling device provided on the PCB
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc Digital Transmission (AREA)
Abstract
The present invention provides a kind of USB attachment means, USB fabric and terminal.A kind of USB attachment means, including：First impedance-matching device and the second impedance-matching device；First differential signal pin of one end connection universal serial bus USB interface of first impedance-matching device, the other end connects the first connection end of printing board PCB, and the first connection end of the PCB is connected with the first differential signal connection end of processor；Second differential signal pin of one end connection universal serial bus USB interface of second impedance-matching device, the other end connects the second connection end of the PCB, and the second connection end of the PCB is connected with the second differential signal connection end of processor.The present invention realizes the improvement that impedance mismatch is connected to usb data, and then improves anti-interference, reduces the possibility of distortion.
Description
Technical field
The present invention relates to electronic technology, more particularly to a kind of USB attachment means, USB fabric and terminal.
Background technology
USB (Universal Serial Bus, USB) interface circuit has that transmission speed is fast, user
Just, support hot plug, connect it is flexible and independently-powered the advantages of, be now widely used for mouse, keyboard, printer, scanner,
The interface module of the external equipments such as charger, digital camera and mobile hard disk light.Usb circuit is in the application, it is necessary in resistance
Enough transimission powers could be maintained under the configuration of anti-matching, and reduction connects and the working condition of equipment in itself is produced after load
Influence.
In the prior art, by the way that USB chips are set close proximity to USB socket to shorten difference line length, shorter difference
Cabling is divided to be easily achieved impedance matching by changing the manufacturing process of cabling.Integrated level however as electronic equipment is gradually carried
Height, USB socket module as shown in Figure 1 by flexible PCB, mainboard etc. connect medium is connected with processor, on connection line by
Impedance mismatching is easily caused in inserting a variety of connection media, so as to cause the problem of USB None- identifieds or data transfer distortion.
Reliability in the prior art when usb circuit is installed away from processor is relatively low.
The content of the invention
The present invention provides a kind of USB attachment means, USB fabric and terminal, for solving usb circuit away from processor
The problem of reliability during installation is relatively low.
First aspect present invention provides a kind of USB attachment means, including：First impedance-matching device and the second impedance matching
Device；
First differential signal pin of one end connection universal serial bus USB interface of first impedance-matching device,
The other end connects the first connection end of printing board PCB, the first connection end of the PCB and the first differential signal of processor
Connection end is connected；
Second differential signal pin of one end connection universal serial bus USB interface of second impedance-matching device,
The other end connects the second connection end of the PCB, the second connection end of the PCB and the second differential signal connection end of processor
It is connected.
Further, first impedance-matching device includes first kind inductance.
Further, the quantity of the first kind inductance is one, and the inductance value of the first kind inductance is 18nH.
Further, first impedance-matching device also includes the first multi-path choice device；The first kind inductance
Quantity is N number of, and each the inductance value of the first kind inductance is different from, and the N is the integer more than or equal to 2；
The first multi-path choice device is configured to：The selection signal received according to control end, is selected N number of described first
One in class inductance, access the first differential signal pin of the general-purpose serial bus USB interface and the first of the PCB connects
Connect between end.
Further, second impedance-matching device includes Equations of The Second Kind inductance.
Further, the quantity of the Equations of The Second Kind inductance is one, and the inductance value of the Equations of The Second Kind inductance is 18nH.
Further, second impedance-matching device also includes the second multi-path choice device；The Equations of The Second Kind inductance
Quantity is N number of, and each the inductance value of the Equations of The Second Kind inductance is different from, and the N is the integer more than or equal to 2；
The second multi-path choice device is configured to：The selection signal received according to control end, is selected N number of described second
One in class inductance, access the second differential signal pin of the general-purpose serial bus USB interface and the second of the PCB connects
Connect between end.
Further, first impedance-matching device is made up of a first kind inductance；The second impedance matching dress
Put and be made up of an Equations of The Second Kind inductance；
The first kind inductance and the Equations of The Second Kind inductance and be around on same toroidal core and form common mode choke.
Second aspect of the present invention provides a kind of USB fabric, including USB interface and described USB attachment means.
Third aspect present invention provides a kind of terminal, including described USB fabric.
USB attachment means, USB fabric and terminal that the present invention is provided, pass through the first impedance-matching device and the second impedance
Coalignment；First differential signal pin of one end connection universal serial bus USB interface of first impedance-matching device,
The other end connects the first connection end of printing board PCB, the first connection end of the PCB and the first differential signal of processor
Connection end is connected；First impedance-matching device can by an impedance original paper or multiple impedance original papers by series connection and/or
Mode in parallel is constituted, and according to the difference that element is accessed on connecting line, adaptability is set first impedance-matching device, real
Show the improvement that impedance mismatch is connected to usb data, and then improved anti-interference, reduce the possibility of distortion.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are this hairs
Some bright embodiments, for those of ordinary skill in the art, without having to pay creative labor, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
The USB attachment means schematic diagrames that Fig. 1 provides for prior art；
A kind of USB attachment means structural representation that Fig. 2 provides for the present invention；
Fig. 3 is another USB attachment means structural representation that the present invention is provided；
Fig. 4 is another USB attachment means structural representation that the present invention is provided；
Fig. 5 is another USB attachment means structural representation that the present invention is provided；
Fig. 6 show a kind of USB fabric that the present invention is provided；
Fig. 7 show a kind of terminal that the present invention is provided.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
It should be appreciated that term " comprising " and " having " used herein and their any deformation, it is intended that cover
Lid is non-exclusive to be included, for example, the process, method, system, product or the equipment that contain series of steps or unit are not necessarily limited to
Those steps or unit clearly listed, but may include not list clearly or for these processes, method, product
Or the intrinsic other steps of equipment or unit.
It should be appreciated that term "and/or" used herein is only a kind of incidence relation for describing affiliated partner, represent
There may be three kinds of relations, for example, A and/or B, can be represented：Individualism A, while there is A and B, individualism B these three
Situation.
Technical scheme is described in detail with specifically embodiment below.These specific implementations below
Example can be combined with each other, and may be repeated no more for same or analogous concept or process in some embodiments.
A kind of USB attachment means structural representation that Fig. 2 provides for the present invention.
Embodiment as shown in Figure 2 includes：First impedance-matching device and the second impedance-matching device.
First differential signal pin of one end connection universal serial bus USB interface of first impedance-matching device,
The other end connects the first connection end of printing board PCB, the first connection end of the PCB and the first differential signal of processor
Connection end is connected.
First impedance-matching device can pass through series connection and/or parallel connection by an impedance original paper or multiple impedance original papers
Mode constitute, first impedance-matching device according on connecting line access element difference and adaptability set.
Second differential signal pin of one end connection universal serial bus USB interface of second impedance-matching device,
The other end connects the second connection end of the PCB, the second connection end of the PCB and the second differential signal connection end of processor
It is connected.
Second impedance-matching device can pass through series connection and/or parallel connection by an impedance original paper or multiple impedance original papers
Mode constitute, second impedance-matching device according on connecting line access element difference and adaptability set.
First impedance-matching device and the second impedance-matching device are respectively used to match the first difference letter of USB interface
Number connection and the second differential signal connecting line on impedance, the resistance of first impedance-matching device and the second impedance-matching device
It is anti-can be with identical, can also be different.
The USB attachment means that the present embodiment is provided include the first impedance-matching device and the second impedance-matching device, described
First differential signal pin of one end connection universal serial bus USB interface of the first impedance-matching device, other end connection print
Printed circuit board PCB the first connection end, the first connection end of the PCB is connected with the first differential signal connection end of processor；
First impedance-matching device can by an impedance original paper or multiple impedance original papers series connection and/or it is in parallel by way of group
Into according to the difference that element is accessed on connecting line, adaptability is set first impedance-matching device, is realized to usb data
The improvement of impedance mismatch is connected, and then improves anti-interference, the possibility of distortion is reduced.
Fig. 3 is another USB attachment means structural representation that the present invention is provided.
J200 is a USB interface in Fig. 3, wherein：Pin 5, pin 6, pin 7, pin 8, pin 9 are all grounded；Pin 1：
Pin is the pin being connected with power supply 10；Pin 2：For the first differential signal pin；Pin 3：Draw for the second differential signal
Pin；Pin 4：Pin is transmitted for EIC equipment identification code.T140 is Surge Protector, and T140 can use the wave of ESD5661D07 models
Surge protector.T200 is electrostatic protector.C205 is electric capacity of voltage regulation, can use 4.7 μ F.T140, T200 and C205 are USB
The circuit protecting element of interface connection.The first impedance-matching device is 18nH first kind inductance R141, the second impedance in Fig. 3
The equipped Equations of The Second Kind inductance R142 for being set to 18nH.The first connection end 11 that PCB is again provided with being connected with pin 2, connect with pin 3
The second connection end 12 connect and the pin 13 being connected with pin 4.
On the basis of embodiment illustrated in fig. 2, a kind of implementation of first impedance-matching device is as shown in Figure 3.
In Fig. 3, first impedance-matching device includes first kind inductance.At least one described first kind inductance connection is described general
Between first differential signal pin of serial bus USB interface and the first connection end of the PCB.First kind electricity of the present invention
Sense refers to the inductance being arranged in the first impedance-matching device.
The present embodiment realizes impedance matching by inductance, and suppression common mode signal improves the anti-interference of USB transmission.
In embodiment as shown in Figure 3, the quantity of the first kind inductance is one, and the inductance of the first kind inductance
Measure as 18nH.The impedance of first kind inductance is relevant with the frequency passed through, it is necessary to according to inductance specifications come correspondence.In actual debugging
In, 18nH inductance has preferably eye pattern effect.First impedance-matching device and the second impedance matching dress in embodiment illustrated in fig. 3
The structure put is identical, is all made up of 18nH inductance, still, the structure of the first impedance-matching device and the second impedance-matching device
Can also be different, it is not limited herein.
In the above-described embodiments, first impedance-matching device can also have another implementation：First resistance
Anti- coalignment can include the resistance of small resistance.Specifically, can be a resistant series in the general-purpose serial bus USB
Between first differential signal pin of interface and the first connection end of the PCB.Can also be multiple resistance it is parallel with one another after connect
It is connected between the first differential signal pin of the general-purpose serial bus USB interface and the first connection end of the PCB.
The present embodiment constitutes first impedance-matching device by a 18nH first kind inductance, further increases resistance
Anti- matching and anti-interference.
Fig. 4 is another USB attachment means structural representation that the present invention is provided.
On the basis of Fig. 2, in the embodiment shown in Fig. 4, first impedance-matching device also includes the first multichannel and selected
Select device；The quantity of the first kind inductance is N number of, and each the inductance value of the first kind inductance is different from, and the N is
Integer more than or equal to 2.
The first multi-path choice device is configured to：The selection signal received according to control end, is selected N number of described first
One in class inductance, access the first differential signal pin of the general-purpose serial bus USB interface and the first of the PCB connects
Connect between end.
A kind of implementation of the first multi-path choice device is：In circuit design stage to the first multi-path choice device
Control end input select signal, so as to set the first kind inductance of access.User is docked according to different impedance matching demands
The first kind inductance entered is preset, other N-1 first kind inductance suspensions in first impedance-matching device without.Should
Implementation can configure the USB attachment means under different circuit environment by same first multi-path choice device.Described
One multi-path choice device has versatility.
Another implementation of the first multi-path choice device is：The control end and PCB of first multi-path choice device
Impedance selection signal connection, after circuit production is finished, the associated control element on pcb board is according to specific impedance matching
Control end from demand to the first multi-path choice device send selection signal so that achieve a butt joint into first kind inductance real-time choosing
Select.The implementation reduces the work of circuit designer, and tests oneself to configure the first of access according to mounted pcb board
Class inductance, improves the accuracy of inductance selection.
In the present embodiment, first impedance-matching device also includes the first multi-path choice device；The first kind inductance
Quantity be N number of, the selection signal that the first multi-path choice device is received according to control end, selection is by N number of first kind
One in inductance, access the first connection of the first differential signal pin and the PCB of the general-purpose serial bus USB interface
Between end, the compatibility of the first impedance-matching device is improved.
On the basis of above-described embodiment, second impedance-matching device includes Equations of The Second Kind inductance.Of the present invention
Two class inductance refer to the inductance being arranged in the second impedance-matching device.At least one described Equations of The Second Kind inductance connection is in general string
Between second differential signal pin of row bus USB interface and the second connection end of the PCB.The present embodiment is realized by inductance
Impedance matching, suppression common mode signal improves the anti-interference of USB transmission.
In the embodiment shown in fig. 3, the quantity of the Equations of The Second Kind inductance is one, and the inductance of the Equations of The Second Kind inductance
Measure as 18nH.In actually debugging, 18nH inductance has preferably eye pattern effect.
In the above-described embodiments, second impedance-matching device can also have another implementation：Second resistance
Anti- coalignment can include the resistance of small resistance.Specifically, can be a resistant series in the general-purpose serial bus USB
Between second differential signal pin of interface and the second connection end of the PCB.Can also be multiple resistance it is parallel with one another after connect
It is connected between the second differential signal pin of the general-purpose serial bus USB interface and the second connection end of the PCB.
The present embodiment constitutes second impedance-matching device by a 18nH Equations of The Second Kind inductance, further increases resistance
Anti- matching and anti-interference.
In the embodiment shown in fig. 4, second impedance-matching device also includes the second multi-path choice device；Described
The quantity of two class inductance is N number of, and each the inductance value of the Equations of The Second Kind inductance is different from, and the N is whole more than or equal to 2
Number；
The second multi-path choice device is configured to：The selection signal received according to control end, is selected N number of described second
One in class inductance, access the second differential signal pin of the general-purpose serial bus USB interface and the second of the PCB connects
Connect between end.
The second multi-path choice device is configured to：The selection signal received according to control end, is selected N number of described first
One in class inductance, access the second differential signal pin of the general-purpose serial bus USB interface and the second of the PCB connects
Connect between end.
A kind of implementation of the second multi-path choice device is：In circuit design stage to the second multi-path choice device
Control end input select signal, so as to set the first kind inductance of access.User is docked according to different impedance matching demands
The first kind inductance entered is preset, other N-1 first kind inductance suspensions in first impedance-matching device without.Should
Implementation can configure the USB attachment means under different circuit environment by same second multi-path choice device.Described
Two multi-path choice devices have versatility.
Another implementation of the second multi-path choice device is：The control end and PCB of second multi-path choice device
Impedance selection signal connection, after circuit production is finished, the associated control element on pcb board is according to specific impedance matching
Control end from demand to the second multi-path choice device send selection signal so that achieve a butt joint into first kind inductance real-time choosing
Select.The implementation reduces the work of circuit designer, and tests oneself to configure the first of access according to mounted pcb board
Class inductance, improves the accuracy of inductance selection.
In the present embodiment, second impedance-matching device also includes the second multi-path choice device；The Equations of The Second Kind inductance
Quantity to be N number of；The selection signal that the second multi-path choice device is received according to control end, is selected N number of first kind
One in inductance, access the second connection of the second differential signal pin and the PCB of the general-purpose serial bus USB interface
Between end, the compatibility of the second impedance-matching device is improved.
Fig. 5 is another USB attachment means structural representation that the present invention is provided.
On the basis of Fig. 2, in the embodiment shown in Fig. 5, first impedance-matching device is by a first kind inductance
Composition；Second impedance-matching device is made up of an Equations of The Second Kind inductance；
The first kind inductance and the Equations of The Second Kind inductance and be around on same toroidal core and form common mode choke.
First impedance-matching device and the second impedance-matching device constitute common mode filtering structure, are thus realizing resistance
The switching signal interference produced during USB interface plug is eliminated while anti-matching, to ensure that other electron component exempts interference.This
Embodiment is made up of first impedance-matching device a first kind inductance；Second impedance-matching device is by one
Equations of The Second Kind inductance is constituted；The first kind inductance and the Equations of The Second Kind inductance and be around on same toroidal core and form common mode and grip
Stream circle, improves antijamming capability.
Fig. 6 show a kind of USB fabric that the present invention is provided.On the basis of the illustrated embodiment of Fig. 2~5, Fig. 6 includes
Any shown USB attachment means of USB interface and Fig. 2~5.
Fig. 7 show a kind of terminal that the present invention is provided.Terminal shown in Fig. 7 includes USB fabric as shown in Figure 6.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, or which part or all technical characteristic are entered
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (10)
1. a kind of USB attachment means, it is characterised in that including：First impedance-matching device and the second impedance-matching device；
First differential signal pin of one end connection universal serial bus USB interface of first impedance-matching device, it is another
First connection end of end connection printing board PCB, the first connection end of the PCB and the first differential signal of processor are connected
End is connected；
Second differential signal pin of one end connection universal serial bus USB interface of second impedance-matching device, it is another
The end connection PCB the second connection end, the second connection end of the PCB and the second differential signal connection end phase of processor
Even.
2. device according to claim 1, it is characterised in that first impedance-matching device includes first kind inductance.
3. device according to claim 2, it is characterised in that the quantity of the first kind inductance is one, and described the
The inductance value of one class inductance is 18nH.
4. device according to claim 2, it is characterised in that first impedance-matching device also includes the first multichannel and selected
Select device；The quantity of the first kind inductance is N number of, and each the inductance value of the first kind inductance is different from, and the N is
Integer more than or equal to 2；
The first multi-path choice device is configured to：The selection signal received according to control end, selection is electric by N number of first kind
One in sense, access the first differential signal pin of the general-purpose serial bus USB interface and the first connection end of the PCB
Between.
5. device according to claim 1, it is characterised in that second impedance-matching device includes Equations of The Second Kind inductance.
6. device according to claim 5, it is characterised in that the quantity of the Equations of The Second Kind inductance is one, and described the
The inductance value of two class inductance is 18nH.
7. device according to claim 5, it is characterised in that second impedance-matching device also includes the second multichannel and selected
Select device；The quantity of the Equations of The Second Kind inductance is N number of, and each the inductance value of the Equations of The Second Kind inductance is different from, and the N is
Integer more than or equal to 2；
The second multi-path choice device is configured to：The selection signal received according to control end, selection is electric by N number of Equations of The Second Kind
One in sense, access the second differential signal pin of the general-purpose serial bus USB interface and the second connection end of the PCB
Between.
8. device according to claim 1, it is characterised in that first impedance-matching device is by a first kind inductance
Composition；Second impedance-matching device is made up of an Equations of The Second Kind inductance；
The first kind inductance and the Equations of The Second Kind inductance and be around on same toroidal core and form common mode choke.
9. a kind of USB fabric, it is characterised in that the USB attachment means including USB interface and as described in claim 1-8 is any.
10. a kind of terminal, it is characterised in that including USB fabric as claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710525607.5A CN107317134A (en) | 2017-06-30 | 2017-06-30 | USB attachment means, USB fabric and terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710525607.5A CN107317134A (en) | 2017-06-30 | 2017-06-30 | USB attachment means, USB fabric and terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107317134A true CN107317134A (en) | 2017-11-03 |
Family
ID=60180994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710525607.5A Pending CN107317134A (en) | 2017-06-30 | 2017-06-30 | USB attachment means, USB fabric and terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107317134A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109061595A (en) * | 2018-08-08 | 2018-12-21 | 深圳大学 | MMW RADAR SIGNAL USING processing unit and its method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1747250A (en) * | 2004-09-07 | 2006-03-15 | Tdk株式会社 | Signal transmission circuit, electronic device, cable, and connector |
| CN201298234Y (en) * | 2008-09-05 | 2009-08-26 | 厦门盛华电子科技有限公司 | Reader device for near field radio-frequency communication |
| CN201323446Y (en) * | 2008-12-01 | 2009-10-07 | 闻泰集团有限公司 | Static-free handheld mobile device with soft USB function |
| CN105099486A (en) * | 2014-05-23 | 2015-11-25 | 恩智浦有限公司 | Communication circuit with impedance matching |
| CN205811878U (en) * | 2016-06-16 | 2016-12-14 | 深圳市信冠机电有限公司 | A kind of self adaptation ultrasonic motor driver and high pressure injector |
| CN206237433U (en) * | 2016-11-30 | 2017-06-09 | 中国科学院沈阳自动化研究所 | Circuit system for enhancing anti-common mode noise interference ability of CAN bus signal |
-
2017
- 2017-06-30 CN CN201710525607.5A patent/CN107317134A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1747250A (en) * | 2004-09-07 | 2006-03-15 | Tdk株式会社 | Signal transmission circuit, electronic device, cable, and connector |
| CN201298234Y (en) * | 2008-09-05 | 2009-08-26 | 厦门盛华电子科技有限公司 | Reader device for near field radio-frequency communication |
| CN201323446Y (en) * | 2008-12-01 | 2009-10-07 | 闻泰集团有限公司 | Static-free handheld mobile device with soft USB function |
| CN105099486A (en) * | 2014-05-23 | 2015-11-25 | 恩智浦有限公司 | Communication circuit with impedance matching |
| CN205811878U (en) * | 2016-06-16 | 2016-12-14 | 深圳市信冠机电有限公司 | A kind of self adaptation ultrasonic motor driver and high pressure injector |
| CN206237433U (en) * | 2016-11-30 | 2017-06-09 | 中国科学院沈阳自动化研究所 | Circuit system for enhancing anti-common mode noise interference ability of CAN bus signal |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109061595A (en) * | 2018-08-08 | 2018-12-21 | 深圳大学 | MMW RADAR SIGNAL USING processing unit and its method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104135148B (en) | A kind of usb circuit | |
| CN100581002C (en) | Connector and high-voltage surge protection method thereof | |
| CN204030947U (en) | A kind of usb circuit | |
| US8185682B2 (en) | USB 2.0 bi-directional bus channel with boost circuitry | |
| CN106897241A (en) | A kind of usb circuit and mobile terminal being applied in mobile terminal | |
| CN107317134A (en) | USB attachment means, USB fabric and terminal | |
| CN202550228U (en) | Universal serial bus (USB) head and USB equipment with same | |
| US20140009243A1 (en) | Network signal coupling and emi protection circuit | |
| CN101359994A (en) | Method lowering network port radiation, port impedance matching circuit and apparatus | |
| JP2017059517A (en) | Electronic apparatus, and printer | |
| CN112346403A (en) | Extend module connecting circuit | |
| US9270499B2 (en) | Network signal enhancement circuit assembly | |
| CN206892859U (en) | Can interface circuit | |
| US9252736B2 (en) | Network signal coupling and EMI protection circuit | |
| CN204733134U (en) | Network signal noise filtering circuit | |
| CN210488540U (en) | USB interface expansion device and numerical control system | |
| US9646757B2 (en) | Surge protective network signal processing circuit assembly | |
| CN204258285U (en) | Lightning protection device for network signal processing circuit | |
| CN210075211U (en) | Signal transmission circuit and device | |
| CN209641837U (en) | A kind of antenna module, electronic equipment and system | |
| CN111786695A (en) | A 5G wireless industrial chip for strong electric field environments | |
| CN112398540B (en) | Optical module and signal processing system comprising same | |
| CN104659590A (en) | USB connector | |
| CN105138483B (en) | USB interface expansion device and communication method thereof | |
| CN206575437U (en) | A kind of remote port docking checking tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20171103 |