CN106849928A - USB on-off circuits and terminal - Google Patents
USB on-off circuits and terminal Download PDFInfo
- Publication number
- CN106849928A CN106849928A CN201710036015.7A CN201710036015A CN106849928A CN 106849928 A CN106849928 A CN 106849928A CN 201710036015 A CN201710036015 A CN 201710036015A CN 106849928 A CN106849928 A CN 106849928A
- Authority
- CN
- China
- Prior art keywords
- usb
- terminal
- circuits
- lower margin
- resistive element
- 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
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Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/74—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of diodes
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4004—Coupling between buses
- G06F13/4022—Coupling between buses using switching circuits, e.g. switching matrix, connection or expansion network
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Mathematical Physics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Telephone Function (AREA)
Abstract
The present embodiments relate to electronic technology field, a kind of USB on-off circuits and terminal are disclosed.In the embodiment of the present invention, USB on-off circuits include：Resistive element, inductance element, the first capacity cell and electronic switch；The first end of resistive element is used to receive control signal, and the second end is connected to the first end of inductance element；The first end of the first capacity cell is connected to the second end of inductance element, and the second end is used to connect the shell lower margin of USB female connectors；The first end of electronic switch is connected to the second end of inductance element, the second end ground connection；The embodiment of the present invention additionally provides a kind of terminal；The embodiment of the present invention can switch on off state according to the control signal that receives, so that shell lower margin adapts to Sexual behavior mode ground connection or earth-free under the different working condition of terminal, reduce as far as possible while influenceed on antenna efficiency, the yield of raising terminal.
Description
Technical field
The present embodiments relate to electronic technology field, more particularly to a kind of USB on-off circuits and terminal.
Background technology
The terminals such as mobile phone, panel computer are widely used in the life of people, for the life of people provides convenient, terminal
Each electronic component of middle installation, common cooperation realizes each function of terminal；Wherein, the USB females connection installed in terminal
Device, for connecting USB male joint connector to realize the functions such as data transfer, charging.
In existing terminal, including antenna, USB female connectors (USB female connectors include connector body and metal
Shell)；Generally, USB female connectors are located at the lower section of antenna, cause metal shell that considerable influence, drop are produced to antenna efficiency
Low antenna efficiency.Therefore, in the prior art, conventional method is for the shell lower margin being grounded and ground connection by metal shell
End disconnects, i.e. be not turned between metal shell and earth terminal.
However, realize it is of the invention during, inventor find there are the following problems in the prior art：(1) terminal
In the authentication test of radiation dispersion during on charger, metal shell and earth terminal disconnection process, it is likely that so that signal
Harmonic radiation power enhancing, causing the authentication test of radiation dispersion cannot pass through, and reduce the yield of terminal.(2) metal
Shell and earth terminal disconnection process, when terminal is by USB line transmission data, the interference of transmission signal on USB line to antenna
Enhancing.(3) in factory to the antenna coupling measurement of terminal, due to metal shell and earth terminal disconnection process, coupling is reduced
Stability.
The content of the invention
The purpose of embodiment of the present invention implementation method is to provide a kind of USB on-off circuits and terminal, can be according to reception
The control signal switching on off state for arriving, so that shell lower margin adapts to Sexual behavior mode ground connection under the different working condition of terminal
Or it is earth-free, reduce as far as possible while influenceed on antenna efficiency, improve the yield of terminal.
In order to solve the above technical problems, The embodiment provides a kind of USB on-off circuits, including resistive element,
Inductance element, the first capacity cell and electronic switch；The first end of the resistive element is used to receive control signal, the second end
It is connected to the first end of the inductance element；The first end of first capacity cell is connected to the second of the inductance element
End, the second end is used to connect the shell lower margin of the USB female connectors；The first end of the electronic switch is connected to the electricity
Second end of sensing unit, the second end ground connection；Wherein, when the first end of the resistive element does not receive the control signal, institute
State electronic switch and be in cut-off state, the shell lower margin of the USB female connectors is earth-free；The first end of the resistive element
When receiving control signal, the electronic switch is in the conduction state, the shell lower margin ground connection of the USB female connectors.
The embodiment of the present invention additionally provides a kind of terminal, including：Above-mentioned USB on-off circuits, USB female connectors and
Processor；The USB female connectors include shell lower margin；The first end of the resistive element is connected to the processor, institute
The second end for stating the first capacity cell is connected to the shell lower margin；
The present invention is in terms of existing technologies, there is provided a kind of USB on-off circuits, including resistive element, the first electric capacity
Element and electronic switch；The first end of resistive element is used to receive control signal, and the second end of the first capacity cell is used to connect
Connect the shell lower margin of USB female connectors, the second end ground connection of electronic switch；That is, the present invention both meets reduction and antenna is imitated
The requirement of the influence of rate, and the control signal that USB on-off circuits of the invention can be received according to resistive element switch out
The state (that is, electronic switch ground connection or earth-free) of pass, so that shell lower margin can be adapted to according to the working condition of terminal
Sexual behavior mode is grounded or earth-free, instead of shell lower margin earth-free feelings under any working condition of terminal in the prior art
Condition so that terminal can pass through the authentication test of radiation dispersion, improves the yield of terminal, and when terminal passes through USB line
During transmission data, the interference to antenna can be reduced；In addition, in factory's antenna coupling measurement, can reduce as far as possible to coupling
Close the influence of stability.
In addition, USB on-off circuits also include the second capacity cell；The first end of second capacity cell is connected to described
The first end of resistive element, the second end ground connection.In the present embodiment, increase by the second capacity cell, can be to the control signal of reception
It is filtered treatment.
In addition, electronic switch is diode；The anode of the diode is connected to the second end of the inductance element,
Minus earth.In the present embodiment, there is provided a type of electronic switch.
In addition, diode is PIN diode.In the present embodiment, there is provided a type of diode.
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
The accompanying drawing to be used needed for having technology description is 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, on the premise of not paying creative work, can be with root
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the schematic diagram of the USB on-off circuits according to first embodiment；
Fig. 2 is the schematic diagram including the second capacity cell in first embodiment；
Fig. 3 is that the electronic switch in first embodiment is the schematic diagram of diode；
Fig. 4 is the schematic diagram of the terminal according to second embodiment.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to each reality of the invention
The mode of applying is explained in detail.However, it will be understood by those skilled in the art that in each implementation method of the invention,
In order that reader more fully understands the application and proposes many ins and outs.But, even if without these ins and outs and base
Many variations and modification in following implementation method, it is also possible to realize the application technical scheme required for protection.
First embodiment of the invention is related to a kind of USB on-off circuits, is applied to the USB female connectors in terminal,
As shown in figure 1, USB on-off circuits include：Resistive element R, inductance component L, the first capacity cell C1And electronic switch S.
In present embodiment, the first end of resistive element R is used to receive control signal, and the second end is connected to inductance component L
First end；First capacity cell C1First end be connected to the second end of inductance component L, the second end is used to connect USB females
The shell lower margin (being used for the pin being grounded i.e. on shell) of connector；The first end of electronic switch S is connected to the of inductance component L
Two ends, the second end ground connection.
In present embodiment, resistive element R is used for electron switch and provides suitable bias current, and the of resistive element R
(low level is received when one end does not receive control signal), electronic switch S is in cut-off state, USB female connectors
Shell lower margin is earth-free.In the present embodiment, (high level is received) when the first end of resistive element R receives control signal,
Inductance component L (for the mobile communication frequency range commonly used, may be provided at tens of nanohenrys or so, example for isolating high-frequency signal
Such as 47 nanohenrys), the first capacity cell C1(for the mobile communication frequency range commonly used, be may be provided at for isolated DC signal
Tens of pico farads or so, such as 56 pico farads), electronic switch S is in the conduction state, the shell lower margin ground connection of USB female connectors；
That is, resistive element R, inductance component L and electronic switch S form DC loop.
Wherein, the concrete numerical value of resistive element R determines that the present embodiment is not made to this by the specification of control voltage and diode
Any limitation.Such as control voltage is 1.8 volts, and the bias current of electronic switch is 5 milliamperes (for example electronic switch uses silicone tube)
Then resistive element R=(1.8-0.7)/0.005=220 ohm.
Preferably, as shown in Fig. 2 in the present embodiment, USB on-off circuits also include the second capacity cell C2.Second electric capacity
Element C2First end be connected to the first end of resistive element R, the second end ground connection.In the present embodiment, the second capacity cell C2Play
Filter action.
In present embodiment, as shown in figure 3, electronic switch S can be diode.The anode of diode is connected to inductance unit
Second end of part L, minus earth.When the first end of resistive element R does not receive control signal, diode is in cut-off state,
The shell lower margin of USB female connectors is earth-free；When the first end of resistive element R receives control signal, diode is in and leads
Logical state, the shell lower margin ground connection of USB female connectors.Right the present embodiment does not make any limit to the particular type of electronic switch S
System, such as electronic switch S can also be switched for integrated chip.
In the present embodiment, diode can be PIN diode；I.e. there is provided a type of diode.
Embodiments of the invention are in terms of existing technologies, there is provided a kind of USB on-off circuits, including resistive element,
First capacity cell and electronic switch；The first end of resistive element is used to receive control signal, the second of the first capacity cell
Hold the shell lower margin for connecting USB female connectors, the second end ground connection of electronic switch；That is, it is right present invention accomplishes reducing
While the requirement of the influence of antenna efficiency, additionally it is possible to which the control signal that is received according to resistive element switches the state of switch
(that is, electronic switch ground connection or earth-free), so that shell lower margin can adapt to Sexual behavior mode according to the working condition of terminal connecing
Ground is earth-free, instead of shell lower margin earth-free situation under any working condition of terminal in the prior art so that eventually
End can pass through the authentication test of radiation dispersion, improve the yield of terminal, and when terminal transmits data by USB line
When, the interference to antenna can be reduced；In addition, in factory's antenna coupling measurement, can reduce as far as possible to coupling stability
Influence.
Second embodiment of the present invention is related to a kind of terminal, and such as terminal is mobile phone, as shown in figure 4, terminal includes：The
The USB on-off circuits of one implementation method, USB female connectors 1 and processor 2.
In present embodiment, USB female connectors 1 include shell lower margin 11 to 14.The first end of resistive element R is connected to
Processor 2, the first capacity cell C1The second end be connected to shell lower margin 11 to 14.
In present embodiment, when terminal does not detect charging wire or USB line is accessed, the output low level of processor 2,
The shell lower margin 11 to 14 of USB female connectors 1 is earth-free.When terminal detect charging wire or USB line access or charging wire with
USB line accesses (such as USB line with charge function) or during in special test mode simultaneously, and processor 2 exports electricity high
Flat, the shell lower margin 11 to 14 of USB female connectors 1 is grounded.
In terms of existing technologies, terminal includes the USB on-off circuits that the present invention is provided to embodiments of the invention so that
The shell lower margin of the USB female connectors in terminal can adapt to Sexual behavior mode ground connection or earth-free according to the working condition of terminal,
The shell lower margin of the existing terminal earth-free situation under any working condition of terminal is instead of, is met and reduce as far as possible to day
The requirement of the influence of line efficiency, also enables the terminal to pass through the authentication test of radiation dispersion, improves the yield of terminal.
It will be appreciated by those skilled in the art that all or part of step in realizing above-described embodiment method can be by
Program is completed to instruct the hardware of correlation, and the program storage is in a storage medium, including some instructions are used to so that one
Individual equipment (can be single-chip microcomputer, chip etc.) or processor (processor) perform the application each embodiment methods described
All or part of step.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. are various can store journey
The medium of sequence code.
It will be understood by those skilled in the art that the respective embodiments described above are to realize specific embodiment of the invention,
And in actual applications, can to it, various changes can be made in the form and details, without departing from the spirit and scope of the present invention.
Claims (7)
1. a kind of USB on-off circuits, are applied to the USB female connectors in terminal；Characterized in that, the USB on-off circuits
Including：Resistive element, inductance element, the first capacity cell and electronic switch；
The first end of the resistive element is used to receive control signal, and the second end is connected to the first end of the inductance element；Institute
The first end for stating the first capacity cell is connected to the second end of the inductance element, and the second end is used to connect the USB females company
Connect the shell lower margin of device；The first end of the electronic switch is connected to the second end of the inductance element, the second end ground connection；
Wherein, when the first end of the resistive element does not receive the control signal, the electronic switch is in cut-off state,
The shell lower margin of the USB female connectors is earth-free；When the first end of the resistive element receives control signal, the electricity
Sub switch is in the conduction state, the shell lower margin ground connection of the USB female connectors.
2. USB on-off circuits according to claim 1, it is characterised in that the USB on-off circuits also include the second electric capacity
Element；
The first end of second capacity cell is connected to the first end of the resistive element, the second end ground connection.
3. USB on-off circuits according to claim 1, it is characterised in that the electronic switch is diode；
The anode of the diode is connected to the second end of the inductance element, minus earth.
4. USB on-off circuits according to claim 3, it is characterised in that the diode is PIN diode.
5. USB on-off circuits according to claim 1, it is characterised in that the electronic switch is integrated chip switch.
6. a kind of terminal, it is characterised in that including：USB on-off circuits, USB in claim 1 to 5 described in any one is female
Head connector and processor；
The USB female connectors include shell lower margin；
The first end of the resistive element is connected to the processor, and the second end of first capacity cell is connected to outside described
Shell lower margin.
7. terminal according to claim 6, it is characterised in that the terminal is mobile phone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710036015.7A CN106849928A (en) | 2017-01-18 | 2017-01-18 | USB on-off circuits and terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710036015.7A CN106849928A (en) | 2017-01-18 | 2017-01-18 | USB on-off circuits and terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106849928A true CN106849928A (en) | 2017-06-13 |
Family
ID=59124596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710036015.7A Pending CN106849928A (en) | 2017-01-18 | 2017-01-18 | USB on-off circuits and terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106849928A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108847561A (en) * | 2018-06-27 | 2018-11-20 | 维沃移动通信有限公司 | A kind of electronic equipment |
| CN108957168A (en) * | 2018-05-22 | 2018-12-07 | 南昌华勤电子科技有限公司 | Usb circuit and electronic equipment comprising it |
| WO2020063177A1 (en) * | 2018-09-25 | 2020-04-02 | 中兴通讯股份有限公司 | Method, apparatus and device for improving mobile terminal antenna efficiency, and storage medium |
| CN111026695A (en) * | 2019-12-10 | 2020-04-17 | 上海闻泰电子科技有限公司 | USB connection device, method, computer equipment and storage medium |
| CN112313928A (en) * | 2018-06-29 | 2021-02-02 | 华为技术有限公司 | A USB socket operation circuit and terminal |
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Application publication date: 20170613 |
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