CN109219330A - Electronic equipment - Google Patents
Electronic equipment Download PDFInfo
- Publication number
- CN109219330A CN109219330A CN201710534966.7A CN201710534966A CN109219330A CN 109219330 A CN109219330 A CN 109219330A CN 201710534966 A CN201710534966 A CN 201710534966A CN 109219330 A CN109219330 A CN 109219330A
- Authority
- CN
- China
- Prior art keywords
- circuit
- antenna
- protected
- electrostatic
- discharge protective
- 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
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0067—Devices for protecting against damage from electrostatic discharge
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0064—Earth or grounding circuit
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Details Of Aerials (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The disclosure provides a kind of electronic equipment, comprising: antenna, shell and circuit board；Circuit board includes electrostatic discharge protective circuit and protected circuit；Antenna and circuit board are fixed inside the housing；Antenna is electrically connected with the input terminal of protected circuit, and antenna is electrically connected with the input terminal of electrostatic protection；Electrostatic discharge protective circuit is in parallel with protected circuit, and the output end of electrostatic discharge protective circuit is electrically connected with the grounding point of protected circuit；The length of lead is less than preset threshold between electrostatic discharge protective circuit and protected circuit.Because electrostatic discharge protective circuit can fall the Electro-static Driven Comb that antenna discharges; the electrostatic for avoiding antenna from generating generates damage to circuit connected to it; and; because of the length very little of lead between electrostatic discharge protective circuit and protected circuit; it avoids because lead is too long between the two; so that the characteristic of lead is equivalent to parasitic inductance, Electro-static Driven Comb is influenced, further ensures protected circuit from damage.
Description
Technical field
This disclosure relates to technical field of electronic communication more particularly to electronic equipment.
Background technique
Now, many electronic equipments can carry out wireless communication, such as wireless near field communication (English: Near
Field Communication, NFC), Wireless Fidelity (English: Wireless Fidelity, WI-FI), mobile network communication
Deng electronic equipment may include smart phone, tablet computer, NFC device etc..
Electronic equipment realizes communication function by antenna, and the antenna of electronic equipment is easy accumulation electrostatic, produces in antenna field
After raw electric discharge phenomena, electrostatic energy can enter the circuit connecting with antenna, such as radio frequency (English: Radio by antenna
Frequency, RF) circuit, this can cause very big damage to the circuit connecting with antenna.
Summary of the invention
The embodiment of the present disclosure provides a kind of electronic equipment.The technical solution is as follows:
According to the first aspect of the embodiments of the present disclosure, a kind of electronic equipment is provided, which includes: antenna, shell
And circuit board；
Circuit board includes electrostatic discharge protective circuit and protected circuit；Antenna and circuit board are fixed inside the housing；
Antenna is electrically connected with the input terminal of protected circuit, and antenna is electrically connected with the input terminal of electrostatic protection；
Electrostatic discharge protective circuit is in parallel with protected circuit, the output end of electrostatic discharge protective circuit and the grounding point of protected circuit
Electrical connection；The length of lead is less than preset threshold between electrostatic discharge protective circuit and protected circuit.
Because electrostatic discharge protective circuit can fall the Electro-static Driven Comb that antenna discharges, the electrostatic pair for avoiding antenna from generating connects with it
The circuit that connects generates damage, moreover, because between electrostatic discharge protective circuit and protected circuit lead length very little, avoid because
Lead is too long between the two, so that the characteristic of lead is equivalent to parasitic inductance, influences Electro-static Driven Comb, further ensures protected
Circuit is from damage.
In one embodiment, protected circuit includes radio circuit.
In general, the circuit connecting with antenna all includes radio circuit, the signal that antenna sends and receivees is handled, because
This, radio circuit is to need to carry out electrostatic protection to it apart from the closer circuit of antenna ratio in electronic equipment.
In one embodiment, electrostatic discharge protective circuit resistance value in conducting is lower than the first preset resistive value, static protection circuit
When being not turned on, resistance value is higher than the second preset resistive value.
High value is presented when no electrostatic passes through in electrostatic discharge protective circuit, will not influence protected circuit normal work, when
When antenna release electrostatic, the instantaneous voltage of electrostatic is higher, and low resistance is presented in electrostatic discharge protective circuit, and Electro-static Driven Comb is fallen, is avoided
Protected circuit is by static damage.
In one embodiment, electrostatic discharge protective circuit includes electrostatic protection pipe；
The input terminal of electrostatic protection pipe is electrically connected with antenna, the output end of electrostatic protection pipe and the grounding point of protected circuit
Electrical connection.
The effect of electrostatic protection pipe release electrostatic is preferable, and structure is also simple, will not be because of increase electrostatic protection pipe by electronics
Device structure becomes too complicated.
In one embodiment, electrostatic protection pipe includes that bidirectional transient voltage inhibits TVS diode.
Two-way TVS diode can guide the alternating current in electrostatic to discharge, and the electrostatic that antenna generates generally comprises friendship
Galvanic electricity stream, therefore, the Electro-static Driven Comb effect that two-way TVS diode generates antenna are preferable.
In one embodiment, which further includes center；
Center is fixedly connected with shell, and circuit board is fixed on center.
Circuit board is fixed on the center being fixedly connected with shell, circuit board is more firm.
In one embodiment, the grounding point of protected circuit is arranged on center.
The grounding point of protected circuit is arranged on center, and in antenna release electrostatic, electrostatic discharge protective circuit can be incited somebody to action
Electrostatic imports the grounding point of center, and because circuit board is fixed on center, the grounding point of electrostatic discharge protective circuit and center
Be closer, can quick release electrostatic, avoid protected circuit by static damage.
In one embodiment, electronic equipment is terminal device.
Terminal device, such as smart phone, tablet computer etc., it is more common in life, it is higher to user's frequency of use
Terminal device carry out electrostatic protection, avoid it by static damage, improve user experience.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
The disclosure can be limited.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows the implementation for meeting the disclosure
Example, and together with specification for explaining the principles of this disclosure.
Fig. 1 is the block diagram of a kind of electronic equipment shown according to an exemplary embodiment；
Fig. 2 is a kind of effect diagram of electrostatic discharge protective circuit shown according to an exemplary embodiment；
Fig. 3 is a kind of effect diagram of electrostatic discharge protective circuit shown according to an exemplary embodiment；
Fig. 4 is the block diagram of a kind of electronic equipment shown according to an exemplary embodiment；
Fig. 5 is the block diagram of a kind of electronic equipment shown according to an exemplary embodiment；
Fig. 6 is the block diagram of a kind of electronic equipment shown according to an exemplary embodiment.
Specific embodiment
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all implementations consistent with this disclosure.On the contrary, they be only with it is such as appended
The example of the consistent device and method of some aspects be described in detail in claims, the disclosure.
The electronic equipment that the embodiment of the present disclosure provides, comprising: antenna, shell and circuit board；Circuit board includes electrostatic protection
Circuit and protected circuit；Antenna and circuit board are fixed inside the housing；Antenna is electrically connected with the input terminal of protected circuit, day
Line is electrically connected with the input terminal of electrostatic protection；Electrostatic discharge protective circuit is in parallel with protected circuit, the output end of electrostatic discharge protective circuit
It is electrically connected with the grounding point of protected circuit；The length of lead is less than default threshold between electrostatic discharge protective circuit and protected circuit
Value.Because electrostatic discharge protective circuit can fall the Electro-static Driven Comb that antenna discharges, the electrostatic for avoiding antenna from generating is to connected to it
Circuit generates damage, moreover, avoiding because of the length very little of lead between electrostatic discharge protective circuit and protected circuit because of the two
Between lead it is too long so that the characteristic of lead is equivalent to parasitic inductance, influence Electro-static Driven Comb, further ensure protected circuit
From damage.
Fig. 1 is the block diagram of a kind of electronic equipment shown according to an exemplary embodiment, as shown in Figure 1, the electronic equipment
10 include: antenna 101, shell 102 and circuit board 103；
Circuit board 103 includes electrostatic discharge protective circuit 1031 and protected circuit 1032；Antenna 101 and circuit board 103 are fixed
Inside shell 102；
Antenna 101 is electrically connected with the input terminal of protected circuit 1032, and antenna 101 and the input terminal of electrostatic protection are electrically connected
It connects；
Electrostatic discharge protective circuit 1031 is in parallel with protected circuit 1032, the output end of electrostatic discharge protective circuit 1031 with it is protected
The grounding point of circuit 1032 is electrically connected；The length of lead is less than default between electrostatic discharge protective circuit 1031 and protected circuit 1032
Threshold value.
Because electrostatic discharge protective circuit 1031 can fall the Electro-static Driven Comb that antenna 101 discharges, antenna 101 is avoided to generate quiet
Electricity generates damage to circuit connected to it, moreover, because of lead between electrostatic discharge protective circuit 1031 and protected circuit 1032
Length very little, avoid because between the two lead it is too long so that the characteristic of lead is equivalent to parasitic inductance, influences electrostatic and release
It puts, further ensures protected circuit 1032 from damage.
As shown in Fig. 2, Fig. 2 is a kind of effect signal of electrostatic discharge protective circuit 1031 shown according to an exemplary embodiment
Figure；In Fig. 2, electrostatic discharge protective circuit 1031 with transient voltage inhibit (English: Transient Voltage Suppressor,
TVS) for diode, protected circuit 1032 is integrated circuit (English: integrated circuit, IC).Electrostatic protection
Circuit 1031 apart from protected circuit 1032 apart from farther out, i.e. in Fig. 2 the distance between b point and c point farther out, at this point, b point and c
The characteristic of lead between point is equivalent to a parasitic inductance L, and parasitic inductance is lower for the impedance of DC current, for exchange
The impedance of electric current is higher.
In 101 release electrostatic of antenna, the instantaneous voltage of a point is higher, if voltage is V at a pointa, the voltage of b point is Vb, quiet
The conducting voltage of electric protection circuit 1031 is Von, because b point connection be protected circuit 1032 grounding point, to discharge quiet
Electricity, therefore, Vb=0, work as Va=Von+Vb=VonWhen, electrostatic discharge protective circuit 1031 is connected, the Electro-static Driven Comb that antenna 101 is discharged.
Existing DC current in the electric current of Electro-static Driven Comb also has alternating current, the electrostatic discharge protective circuit that DC current passes through conducting
1031 discharge rapidly, and for AC energy, due to the presence of parasitic inductance L, according to the characteristic of inductance, lead to direct current resistance exchange,
DC current can be good at releasing, however be Z=JWL for exchanging its impedance, then by the friendship in electrostatic in parasitic inductance
The voltage that galvanic electricity stream part generates is the voltage V of b pointb=ZI=JWLI > 0.At this point, because Va=Von+Vb, VaIt increases, when
The instantaneous voltage of electrostatic is greater than VonLess than VaWhen, electrostatic discharge protective circuit 1031 is not turned on, and protected circuit 1032 can not be protected
Shield, this can generate damage to protected circuit 1032.
Therefore, as shown in figure 3, Fig. 2 is a kind of effect of electrostatic discharge protective circuit 1031 shown according to an exemplary embodiment
Fruit schematic diagram；The output end of electrostatic discharge protective circuit 1031 is electrically connected with the grounding point of protected circuit 1032, electrostatic discharge protective circuit
The length of lead is less than preset threshold between 1031 and protected circuit 1032, and the characteristic for the parasitic inductance that lead is presented is very
It is weak, very little is influenced on the conducting voltage of electrostatic discharge protective circuit 1031, it is more preferable to the protecting effect of protected circuit 1032.
In one embodiment, protected circuit 1032 includes radio circuit.
In general, the circuit connecting with antenna 101 all includes radio circuit, the signal that antenna 101 sends and receivees is carried out
Processing, therefore, radio circuit is to need to carry out electrostatic protection to it apart from the circuit that antenna 101 is closer in electronic equipment 10.
In one embodiment, the resistance value in conducting of electrostatic discharge protective circuit 1031 is lower than the first preset resistive value, static protection
Circuit resistance value when being not turned on is higher than the second preset resistive value.
High value is presented when no electrostatic passes through in electrostatic discharge protective circuit 1031, and it is normal to will not influence protected circuit 1032
Work, when 101 release electrostatic of antenna, the instantaneous voltage of electrostatic is higher, and low resistance is presented in electrostatic discharge protective circuit 1031, by electrostatic
It discharges, avoids protected circuit 1032 by static damage.
In one embodiment, as shown in figure 4, Fig. 4 is a kind of electronic equipment 10 shown according to an exemplary embodiment
Block diagram, electrostatic discharge protective circuit 1031 include electrostatic protection pipe 10311；
The input terminal of electrostatic protection pipe 10311 is electrically connected with antenna 101, the output end of electrostatic protection pipe 10311 with protected
The grounding point of protection circuit 1032 is electrically connected.
The effect of 10311 release electrostatic of electrostatic protection pipe is preferable, and structure is also simple, will not be because of increase electrostatic protection pipe
10311 allow 10 structure of electronic equipment to become too complicated.
In one embodiment, electrostatic protection pipe 10311 includes that bidirectional transient voltage inhibits TVS diode.
Two-way TVS diode can guide the alternating current in electrostatic to discharge, and the electrostatic that antenna 101 generates generally comprises
Alternating current, therefore, the Electro-static Driven Comb effect that two-way TVS diode generates antenna 101 are preferable.With two-way bis- pole TVS in Fig. 4
For pipe, does not represent the disclosure and be confined to this.
In one embodiment, as shown in figure 5, Fig. 5 is a kind of electronic equipment 10 shown according to an exemplary embodiment
Block diagram, which further includes center 104；
Center 104 is fixedly connected with shell 102, and circuit board 103 is fixed on center 104.
Circuit board 103 is fixed on the center 104 being fixedly connected with shell 102, circuit board 103 is more firm.
In one embodiment, as shown in fig. 6, Fig. 6 is a kind of electronic equipment 10 shown according to an exemplary embodiment
Block diagram, the grounding point of protected circuit 1032 is arranged on center 104.
The grounding point of protected circuit 1032 is arranged on center 104, in 101 release electrostatic of antenna, electrostatic protection electricity
Electrostatic can be imported the grounding point of center 104 by road 1031, and because circuit board 103 is fixed on center 104, it is quiet
Electric protection circuit 1031 and the grounding point of center 104 are closer, can quick release electrostatic, avoid protected circuit 1032 by
To static damage.
In one embodiment, electronic equipment 10 is terminal device.
Terminal device, such as smart phone, tablet computer etc., it is more common in life, it is higher to user's frequency of use
Terminal device carry out electrostatic protection, avoid it by static damage, improve user experience.
The electronic equipment that the embodiment of the present disclosure provides, comprising: antenna, shell and circuit board；Circuit board includes electrostatic protection
Circuit and protected circuit；Antenna and circuit board are fixed inside the housing；Antenna is electrically connected with the input terminal of protected circuit, day
Line is electrically connected with the input terminal of electrostatic protection；Electrostatic discharge protective circuit is in parallel with protected circuit, the output end of electrostatic discharge protective circuit
It is electrically connected with the grounding point of protected circuit；The length of lead is less than default threshold between electrostatic discharge protective circuit and protected circuit
Value.Because electrostatic discharge protective circuit can fall the Electro-static Driven Comb that antenna discharges, the electrostatic for avoiding antenna from generating is to connected to it
Circuit generates damage, moreover, avoiding because of the length very little of lead between electrostatic discharge protective circuit and protected circuit because of the two
Between lead it is too long so that the characteristic of lead is equivalent to parasitic inductance, influence Electro-static Driven Comb, further ensure protected circuit
From damage.
Those skilled in the art will readily occur to its of the disclosure after considering specification and practicing disclosure disclosed herein
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the disclosure, these modifications, purposes or
Person's adaptive change follows the general principles of this disclosure and including the undocumented common knowledge in the art of the disclosure
Or conventional techniques.The description and examples are only to be considered as illustrative, and the true scope and spirit of the disclosure are by following
Claim is pointed out.
It should be understood that the present disclosure is not limited to the precise structures that have been described above and shown in the drawings, and
And various modifications and changes may be made without departing from the scope thereof.The scope of the present disclosure is only limited by the accompanying claims.
Claims (8)
1. a kind of electronic equipment, which is characterized in that the electronic equipment includes: antenna, shell and circuit board；
The circuit board includes electrostatic discharge protective circuit and protected circuit；The antenna and the circuit board are fixed on the shell
It is internal；
The antenna is electrically connected with the input terminal of the protected circuit, and the input terminal of the antenna and the electrostatic protection is electrically connected
It connects；
The electrostatic discharge protective circuit is in parallel with the protected circuit, the output end of the electrostatic discharge protective circuit with it is described protected
The grounding point of circuit is electrically connected；The length of lead is less than default threshold between the electrostatic discharge protective circuit and the protected circuit
Value.
2. electronic equipment according to claim 1, which is characterized in that
The protected circuit includes radio circuit.
3. electronic equipment according to claim 1, which is characterized in that
Electrostatic discharge protective circuit resistance value in conducting is lower than the first preset resistive value, static protection circuit resistance when being not turned on
Value is higher than the second preset resistive value.
4. electronic equipment according to claim 1, which is characterized in that the electrostatic discharge protective circuit includes electrostatic protection pipe；
The input terminal of the electrostatic protection pipe is electrically connected with the antenna, the output end of the electrostatic protection pipe with it is described protected
The grounding point of circuit is electrically connected.
5. electronic equipment according to claim 4, which is characterized in that
The electrostatic protection pipe includes that transient voltage inhibits two-way TVS diode.
6. electronic equipment according to claim 1, which is characterized in that the electronic equipment further includes center；
The center is fixedly connected with the shell, and the circuit board is fixed on the center.
7. electronic equipment according to claim 6, which is characterized in that
The grounding point of the protected circuit is arranged on the center.
8. electronic equipment according to claim 1-7, which is characterized in that
The electronic equipment is terminal device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710534966.7A CN109219330A (en) | 2017-07-03 | 2017-07-03 | Electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710534966.7A CN109219330A (en) | 2017-07-03 | 2017-07-03 | Electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109219330A true CN109219330A (en) | 2019-01-15 |
Family
ID=64992605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710534966.7A Pending CN109219330A (en) | 2017-07-03 | 2017-07-03 | Electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109219330A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109862138A (en) * | 2017-11-30 | 2019-06-07 | 北京小米移动软件有限公司 | Electronic equipment |
| CN111132437A (en) * | 2019-12-11 | 2020-05-08 | 维沃移动通信有限公司 | Mobile terminal |
| RU2729962C1 (en) * | 2019-02-22 | 2020-08-13 | Бейдзин Сяоми Мобайл Софтвэр Ко., Лтд. | Antenna unit and electronic device |
| CN111614803A (en) * | 2019-02-25 | 2020-09-01 | 北京小米移动软件有限公司 | Housing assembly and sliding terminal device |
| EP3716400A1 (en) * | 2019-03-29 | 2020-09-30 | Beijing Xiaomi Mobile Software Co., Ltd. | Electronic device |
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| CN102163840A (en) * | 2010-02-24 | 2011-08-24 | 台湾积体电路制造股份有限公司 | Electrostatic discharge protection circuit, structure and radio-frequency receiver |
| CN102779818A (en) * | 2012-07-04 | 2012-11-14 | 西安电子科技大学 | Electrostatic protection circuit for radio-frequency identification tag |
| CN202841677U (en) * | 2012-06-15 | 2013-03-27 | 深圳市鑫银通科技有限公司 | Anti-static circuit board |
| CN203607834U (en) * | 2013-11-26 | 2014-05-21 | 成都理想科技开发有限公司 | Interface protection circuit of wireless receiving circuit |
| CN206116622U (en) * | 2016-10-13 | 2017-04-19 | 建荣集成电路科技(珠海)有限公司 | Radio frequency antenna circuitry and pin electrostatic protection circuit thereof |
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- 2017-07-03 CN CN201710534966.7A patent/CN109219330A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102163840A (en) * | 2010-02-24 | 2011-08-24 | 台湾积体电路制造股份有限公司 | Electrostatic discharge protection circuit, structure and radio-frequency receiver |
| CN202841677U (en) * | 2012-06-15 | 2013-03-27 | 深圳市鑫银通科技有限公司 | Anti-static circuit board |
| CN102779818A (en) * | 2012-07-04 | 2012-11-14 | 西安电子科技大学 | Electrostatic protection circuit for radio-frequency identification tag |
| CN203607834U (en) * | 2013-11-26 | 2014-05-21 | 成都理想科技开发有限公司 | Interface protection circuit of wireless receiving circuit |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109862138A (en) * | 2017-11-30 | 2019-06-07 | 北京小米移动软件有限公司 | Electronic equipment |
| RU2729962C1 (en) * | 2019-02-22 | 2020-08-13 | Бейдзин Сяоми Мобайл Софтвэр Ко., Лтд. | Antenna unit and electronic device |
| CN111614803A (en) * | 2019-02-25 | 2020-09-01 | 北京小米移动软件有限公司 | Housing assembly and sliding terminal device |
| CN111614803B (en) * | 2019-02-25 | 2024-02-06 | 北京小米移动软件有限公司 | Shell assembly and sliding type terminal equipment |
| EP3716400A1 (en) * | 2019-03-29 | 2020-09-30 | Beijing Xiaomi Mobile Software Co., Ltd. | Electronic device |
| CN111756028A (en) * | 2019-03-29 | 2020-10-09 | 北京小米移动软件有限公司 | Electronic device |
| CN111756028B (en) * | 2019-03-29 | 2022-07-01 | 北京小米移动软件有限公司 | Electronic device |
| US11437811B2 (en) | 2019-03-29 | 2022-09-06 | Beijing Xiaomi Mobile Software Co., Ltd. | Electronic device |
| CN111132437A (en) * | 2019-12-11 | 2020-05-08 | 维沃移动通信有限公司 | Mobile terminal |
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Application publication date: 20190115 |