CN205721801U - The protection circuit of subscriber identification card and electronic equipment - Google Patents
The protection circuit of subscriber identification card and electronic equipment Download PDFInfo
- Publication number
- CN205721801U CN205721801U CN201620322666.3U CN201620322666U CN205721801U CN 205721801 U CN205721801 U CN 205721801U CN 201620322666 U CN201620322666 U CN 201620322666U CN 205721801 U CN205721801 U CN 205721801U
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- input
- output
- outfan
- subscriber identification
- identification card
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Abstract
This utility model relates to electronic technology field, discloses protection circuit and the electronic equipment of a kind of subscriber identification card.The protection circuit of this subscriber identification card is applied to the electronic equipment with open type deck, comprises: detector unit, switch control unit and supply module；Switch control unit comprises control end, first input end, the second input and outfan；Controlling end to be connected with the output of detector unit, first input end is connected with the output of power supervisor, and the second input is connected with supply module, and outfan is connected with the power input of electronic equipment deck control circuit；Wherein, when control end is low level, outfan output voltage, when control end is high level, outfan not output voltage.In this utility model so that during the Kato of plug SIM or TF card, can avoid burning out mainboard or burning out the phenomenon generation of SIM or TF card.
Description
Technical field
This utility model relates to electronic technology field, particularly to subscriber identification card protection circuit and
Electronic equipment.
Background technology
In recent years, along with development and the continuous progress of science and technology, mobile phone or the notes of communication technology
The mobile terminals such as this computer have become requisite use instrument in people's daily life；This is because its
It is convenient to carry, and uses simple and to people life to bring great convenience.And the merit of mobile terminal
The most from strength to strength, can the most gradually penetrate into the life of people.
At present in the design of smart mobile phone, (SIM is Subscriber Identity to the SIM of usual mobile phone
The abbreviation of Module, Chinese is interpreted as: subscriber identification card) and TF card (TF is trans flash
Abbreviation, Chinese is interpreted as: flash card) be separate.But, thinner in order to mobile phone is made, or
Person is made the mainboard of mobile phone less, scheme would generally be selected SIM together with the design of TF card
Deck, or select three to select two decks.So-called three select two decks, it is simply that have three draw-in grooves, 2 SIM
Card draw-in groove, 1 TF card draw-in groove, is that SIM combines with SIM time actually used, or SIM
With the combination of two kinds of TF card, meet the different use demands of different user.For having open type Kato
For mobile phone, as it is shown in figure 1, CD end is low level when inserting Kato, application processor passes through EINT_TF
Port, INT_SIM1 port and INT_SIM2 port can detect the low level signal of CD end,
And application processor is detecting that after CD end is low level, (PMU refers to power management to PMU
Device) send instruction, (wherein, identification card is powered and is used VMCH, VMCH by VMCH to control PMU
It is a supply port) provide voltage to the TF_POWER end of mobile phone card seat.
But, existing three select two decks to there is also techniques below problem: burn out mainboard or burn out SIM.
This is because: but too fast if moving back card, and T card terminal will touch card in the case of having not been powered down
Crossbeam in the middle of torr, causes short circuit, even can burn out mainboard.It addition, under certain circumstances, such as
During machine open/close or in restarting process, the power supply acquiescence having of short duration time T card is opened.As
Fruit plugs Kato at this moment, and T card terminal is likely to contact SIM, thus burns out SIM.
Utility model content
The purpose of this utility model is to provide the protection circuit of a kind of subscriber identification card and electronics to set
Standby so that during the Kato of plug SIM or TF card, can to avoid burning out mainboard or burning out
The phenomenon of SIM or TF card occurs.
For solving above-mentioned technical problem, embodiment of the present utility model provides a kind of user identity identification
The protection circuit of card, is applied to the electronic equipment with open type deck, comprises: detector unit, switch
Control unit and supply module；Switch control unit comprises control end, first input end, the second input
And outfan；Control end to be connected with the output of detector unit, first input end and the output of power supervisor
Being connected, the second input is connected with supply module, outfan and the power supply of electronic equipment deck control circuit
Input is connected；Wherein, when control end is low level, outfan output voltage, control end is high level
Time, outfan not output voltage.
Of the present utility model embodiment further provides a kind of electronic equipment, comprise power supervisor, deck
Control circuit and the protection circuit of subscriber identification card described above；The first of switch control unit
Input is connected with the output of power supervisor；The outfan of switch control unit and deck control circuit
Power input is connected.
This utility model embodiment in terms of existing technologies, due to, for having open type deck
Electronic equipment for, inserting after Kato, control end is low level；After extracting Kato, control end
For high level.Therefore, making when controlling end and being low level by switch control unit, outfan exports
Voltage；When controlling end and being high level, outfan not output voltage.Thus after extracting Kato, control
End is high level, now, even if providing the power supervisor of voltage still to have output for input, but defeated
Go out to hold not output voltage, thus outfan will not carry for the power input of electronic equipment deck control circuit
Voltage supplied, from without burning out SIM (or TF card), more will not burn out the mainboard of electronic equipment.
Further, switch control unit comprises electrical switch, power supply control chip, resistance and the first electricity
Hold；Electrical switch comprises three and connects end, and wherein, the first connection end of electrical switch is connected with controlling end,
Second connects end is connected with Enable Pin EN of power supply control chip, and the 3rd connects end ground connection；Resistance connects
Connect between end and first input end second；The input of power supply control chip and the second input are connected,
Wherein one end of first electric capacity is connected with the input of power supply control chip, other end ground connection；Power supply controls
The outfan of chip is connected with the outfan of switch control unit.Thus, when controlling end and being low level,
Electrical switch ends, and the level of Enable Pin EN of power supply control chip is drawn high, and power supply control chip starts
Work, the outfan output voltage of switch control unit.
It addition, switch control unit can also also comprise the second electric capacity；Wherein one end of second electric capacity with open
The outfan closing control unit is connected, other end ground connection.
Further, supply module is Power Management Unit or battery.
Further, in order to reduce the cost of design cost and device, electrical switch can be designed as
Audion.
Further, detector unit is included as the clamp circuit of the output offer voltage of this detector unit, pincers
The position output of circuit is connected with the output of detector unit.For electronic equipment hence for open type deck,
After extracting Kato, the high level of the outfan of detector unit is provided by clamp circuit always, i.e. controls end
High level provided by clamp circuit always.
Further, clamp circuit comprises resistance；Wherein one end of resistance is connected with the output of detector unit,
The other end is connected with the output of power supervisor, and wherein, the output that power supervisor is detector unit provides
Voltage.It is thus possible to the output offer voltage being detector unit by power supervisor and resistance.
Further, in order to the design making the protection circuit of subscriber identification card is the most succinct, can
With by incorporating resistor in power supervisor.
Accompanying drawing explanation
Fig. 1 is according to the module map of the protection circuit of subscriber identification card in prior art；
Fig. 2 is according to the module map of the protection circuit of subscriber identification card in the first embodiment；
Fig. 3 is according to the protection circuit structure chart of subscriber identification card in the first embodiment.
Detailed description of the invention
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing pair
Each embodiment of the present utility model is explained in detail.But, those of ordinary skill in the art can
To understand, in each embodiment of this utility model, in order to make reader be more fully understood that, the application proposes
Many ins and outs.But, even if there is no these ins and outs and kind based on following embodiment
Plant and change and modifications, it is also possible to realize the application each claim technical scheme required for protection.
First embodiment of the present utility model relates to the protection circuit of a kind of subscriber identification card, application
In the electronic equipment with open type deck.As in figure 2 it is shown, the protection circuit of this subscriber identification card
Comprise: detector unit, switch control unit and supply module；Switch control unit comprise control end 1,
First input end the 2, second input 3 and outfan 4；Control end 1 to be connected with the output of detector unit,
First input end 2 is connected with the output of power supervisor, and (power supervisor is by the VMCH end in Fig. 2
It is connected with the first input end 2 of switch control unit), the second input 3 is connected with supply module and (supplies
Electricity module is connected with the second input 3 of switch control unit by the VBAT in Fig. 2), outfan
4 are connected with the power input of electronic equipment deck control circuit the (electricity of electronic equipment deck control circuit
Source input refers to the TF_POWER in Fig. 2)；Wherein, when control end 1 is low level, output
Hold 4 output voltages, when control end 1 is high level, outfan 4 not output voltage.
Wherein, supply module can be constantly in power supply state.It addition, supply module can be power supply pipe
Reason unit or battery.But, it is worth mentioning at this point that, supply module be not limited to Power Management Unit or
Person's battery, every any type that can be embodied as the supply module that power supply control chip is powered, all should be at this
Within the protection domain of utility model.Such as, supply module can also be power supervisor.
Specifically, due to, for there is the electronic equipment of open type deck, after inserting Kato,
Controlling end 1 is low level；After extracting Kato, controlling end 1 is high level.Therefore, controlled by switch
Unit processed makes when controlling end 1 for low level, outfan 4 output voltage；It is high electricity controlling end 1
At ordinary times, outfan 4 not output voltage.Thus after extracting Kato, controlling end 1 is high level, output
End 4 not output voltage.Now, even if providing the power supervisor of voltage still to have output for first input end,
But due to outfan 4 not output voltage, therefore outfan 4 will not be electronic equipment deck control circuit
Power input provide voltage, from without burning out SIM (or TF card), more will not burn out electricity
The mainboard of subset.
Shown in Fig. 3, switch control unit comprises electrical switch, power supply control chip, resistance R1001
With the first electric capacity C1003；Electrical switch comprises three and connects end, wherein, the first connection of electrical switch
Holding and be connected with control end 1, second connects end is connected with Enable Pin EN of power supply control chip, and the 3rd even
Connect end ground connection；Resistance R1001 is connected between the second connection end and first input end 2；Power supply controls core
Input IN and second input 3 of sheet are connected, wherein one end of the first electric capacity C1003 and power supply control
The input IN of coremaking sheet is connected, other end ground connection；The outfan of power supply control chip and on-off control
The outfan 4 of unit is connected.Specifically, after inserting Kato, controlling end 1 is low level, electronics
Switch cut-off, power supervisor passes through the first input end 2 of switch control unit to power supply control chip
Enable Pin EN provides voltage, makes the level of EN draw high, thus power supply control chip can output voltage
Outfan 4 to switch control unit.Otherwise, after extracting Kato, controlling end 1 is high level, electricity
Sub-switch conduction, due to electrical switch the 3rd connection end ground connection, therefore this electronics by this electrical switch
Second connection end of switch is low level.Thus with this, second to be connected Enable Pin EN that end is connected be low electricity
Flat, thus power supply control chip will not output voltage to the outfan 4 of switch control unit.Thus, now
Even if the power supervisor providing voltage for first input end still has output, but owing to outfan 4 is the most defeated
Going out voltage, therefore outfan 4 will not provide voltage for the power input of electronic equipment deck control circuit,
From without burning out SIM or TF card, the mainboard of electronic equipment more will not be burnt out.
It addition, switch control unit can also also comprise the second electric capacity C1002；Second electric capacity C1002's
Wherein one end is connected with the outfan 4 of switch control unit, other end ground connection.Further, set to reduce
Meter cost and the cost of device, can be designed as audion Q1001 by electrical switch.It is worth mentioning
It is that power supply control chip can essentially be that (LDO is low dropout regulator to a LDO
Being called for short, Chinese is interpreted as: low pressure difference linear voltage regulator).Second electric capacity and LDO in present embodiment
Constituting a LDO circuit, when power supply control chip is in running order, the second electric capacity can maintain
LDO output is in normal output state.
Detector unit in present embodiment can be included as the pincers of the output offer voltage of this detector unit
Position circuit, the output of clamp circuit is connected with the output of detector unit.Electricity hence for open type deck
For subset, after extracting Kato, the high level of the outfan 4 of detector unit is by clamp circuit always
Thering is provided, the high level i.e. controlling end 1 is provided by clamp circuit always.
Specifically, clamp circuit comprises resistance (R1002 as in Fig. 3)；Wherein one end of resistance
Being connected with the output of detector unit, the other end is connected with the output of power supervisor, wherein, and power management
The output that device is detector unit provides voltage.It is thus possible to it is single for detection by power supervisor and resistance
The output of unit provides voltage.Or, in order to make the design of the protection circuit of subscriber identification card more
For succinctly, can be by incorporating resistor in power supervisor.It is thus possible to by power supervisor be directly
The output of detector unit provides voltage.
This utility model the second embodiment relates to a kind of electronic equipment, comprises power supervisor, deck control
The protection circuit of the subscriber identification card described by circuit processed and the first embodiment；Switch control unit
First input end be connected with the output of power supervisor；The outfan of switch control unit controls with deck
The power input of circuit is connected.
In present embodiment, after extracting Kato, even if provide the power supply of voltage for above-mentioned first input end
Manager still has output, and the outfan of switch control unit also will not be electronic equipment deck control circuit
Power input provides voltage, from without burning out SIM (or TF card), more will not burn out electronics
The mainboard of equipment.
It is seen that, present embodiment is the apparatus embodiments corresponding with the first embodiment, this enforcement
Mode can be worked in coordination enforcement with the first embodiment.The relevant technical details mentioned in first embodiment
The most effective, in order to reduce repetition, repeat no more here.Correspondingly, this enforcement
The relevant technical details mentioned in mode is also applicable in the first embodiment.
It will be understood by those skilled in the art that the respective embodiments described above be realize of the present utility model
Specific embodiment, and in actual applications, can to it, various changes can be made in the form and details, and
Without departing from spirit and scope of the present utility model.
Claims (9)
1. a protection circuit for subscriber identification card, the electronics being applied to have open type deck sets
Standby, it is characterised in that to comprise: detector unit, switch control unit and supply module；
Described switch control unit comprises control end, first input end, the second input and outfan；
Described control end is connected with the output of described detector unit, described first input end and power supervisor
Output be connected, described second input is connected with described supply module, described outfan and electronic equipment
The power input of deck control circuit is connected；
Wherein, when described control end is low level, described outfan output voltage, described control end is high
During level, described outfan not output voltage.
The protection circuit of subscriber identification card the most according to claim 1, it is characterised in that
Described switch control unit comprises electrical switch, power supply control chip, resistance and the first electric capacity；
Described electrical switch comprises three and connects end, wherein, the first connection end of electrical switch and described control
End processed is connected, and second connects end is connected with Enable Pin EN of described power supply control chip, and the 3rd connects end
Ground connection；
Described resistance is connected to described second and connects between end and described first input end；
The input of described power supply control chip is connected with described second input, its of described first electric capacity
Middle one end is connected with the input of described power supply control chip, other end ground connection；
The outfan of described power supply control chip is connected with the outfan of described switch control unit.
The protection circuit of subscriber identification card the most according to claim 2, it is characterised in that
Described switch control unit also comprises the second electric capacity；
Wherein one end of described second electric capacity is connected with the outfan of described switch control unit, another termination
Ground.
The protection circuit of subscriber identification card the most according to claim 2, it is characterised in that
Described supply module is Power Management Unit or battery.
The protection circuit of subscriber identification card the most according to claim 2, it is characterised in that
Described electrical switch is audion.
The protection circuit of subscriber identification card the most according to claim 1, it is characterised in that
Described detector unit is included as the clamp circuit of the output offer voltage of this detector unit, described clamp circuit
Output be connected with the output of described detector unit.
The protection circuit of subscriber identification card the most according to claim 6, it is characterised in that
Described clamp circuit comprises resistance；
Wherein one end of described resistance is connected with the output of described detector unit, the other end and described power supply pipe
The output of reason device is connected, and wherein, the output that described power supervisor is described detector unit provides voltage.
The protection circuit of subscriber identification card the most according to claim 7, it is characterised in that
Described incorporating resistor is in described power supervisor.
9. an electronic equipment, it is characterised in that comprise power supervisor, deck control circuit and power
Profit requires the protection circuit of the subscriber identification card in 1 to 8 described in any one；
The first input end of described switch control unit is connected with the output of described power supervisor；
The outfan of described switch control unit is connected with the power input of described deck control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620322666.3U CN205721801U (en) | 2016-04-18 | 2016-04-18 | The protection circuit of subscriber identification card and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620322666.3U CN205721801U (en) | 2016-04-18 | 2016-04-18 | The protection circuit of subscriber identification card and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205721801U true CN205721801U (en) | 2016-11-23 |
Family
ID=57296986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620322666.3U Expired - Fee Related CN205721801U (en) | 2016-04-18 | 2016-04-18 | The protection circuit of subscriber identification card and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205721801U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106650881A (en) * | 2016-12-29 | 2017-05-10 | 珠海市魅族科技有限公司 | Intelligent card holding device and intelligent terminal |
| CN114916161A (en) * | 2021-02-09 | 2022-08-16 | Oppo广东移动通信有限公司 | Electronic device and control method |
-
2016
- 2016-04-18 CN CN201620322666.3U patent/CN205721801U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106650881A (en) * | 2016-12-29 | 2017-05-10 | 珠海市魅族科技有限公司 | Intelligent card holding device and intelligent terminal |
| CN114916161A (en) * | 2021-02-09 | 2022-08-16 | Oppo广东移动通信有限公司 | Electronic device and control method |
| CN114916161B (en) * | 2021-02-09 | 2024-02-27 | Oppo广东移动通信有限公司 | Electronic device and control method |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161123 Termination date: 20200418 |