CN108628788A - Burn-out-proof card control device and burn-out-proof card control method - Google Patents
Burn-out-proof card control device and burn-out-proof card control method Download PDFInfo
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- CN108628788A CN108628788A CN201710181449.6A CN201710181449A CN108628788A CN 108628788 A CN108628788 A CN 108628788A CN 201710181449 A CN201710181449 A CN 201710181449A CN 108628788 A CN108628788 A CN 108628788A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR 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
- G06F13/4063—Device-to-bus coupling
- G06F13/4068—Electrical coupling
- G06F13/4081—Live connection to bus, e.g. hot-plugging
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Abstract
The present invention relates to control technology field more particularly to a kind of burn-out-proof card control devices and burn-out-proof card control method.The burn-out-proof card control device, including deck and card power supply further include：Detector, the state change for detecting deck in hot plug process；Switching device, first end connection card power supply, second end ground connection, and the control terminal of switching device is connect with the detector, for making the card power ground when the deck becomes extraction state from insert state, to discharge the residual charge on card power supply.Burn-out-proof card control device and burn-out-proof card control method provided by the invention, when detecting that deck becomes extraction state from insert state, the residual charge on card power supply is grounded electric discharge by switching device, solve the problems, such as that card is easy to be burned out in hot plug process, improve the stability of user terminal, production cost is reduced, volume production risk is reduced.
Description
Technical field
The present invention relates to control technology field more particularly to a kind of burn-out-proof card control devices and burn-out-proof card control method.
Background technology
Sustainable development with science and technology and people's living standards continue to improve, user terminal (mobile phone, tablet computer
Deng) be widely used.Meanwhile the change of Adjoint technology, internal battery design the master for having become user terminal battery design
Stream trend.In this context, SIM (Subscriber Identification Module) cards, TF (Trans-flash) card heat
Plugging technique has also won the favor of more and more users.So-called hot plug refers to electronic equipment under the state of working on power, and is inserted
Enter or extract its component, user is allowed to take out and replace on electronic equipment in the case where not closing system, not cutting off the power
Component.For needing to be replaced frequently the user of SIM card, TF card, hot plug design can be such that user is replaced under system boot
SIM card, TF card etc. can bring great convenience to user.
With becoming increasingly abundant for user terminal product in the market, SIM card, TF card for being used on user terminal etc. are frequently necessary to
Carry out hot plug operations.But traditional hot plug design only considered the on and off of card power supply, and actually in plug-in card
In the process, the signal pins of the cards such as SIM card, TF card are possible to an anode for encountering card power supply, another encounters the negative of card power supply
Pole will result in short circuit if residue has residual charge on the power supply of card, be burnt to block.Currently, the solution of mainstream
It is to avoid the occurrence of burning card from structure, i.e., adds a repid discharge switch control chip on the anode of card power supply.But
It is that this kind of solution has following both sides defect：On the one hand it is due to the performance by repid discharge switch control chip
And the influence of supply of material limitation, production cost is higher, and volume production risk is larger；On the other hand, the effect of this method is poor, even if addition
Repid discharge switch control chip burns card phenomenon and still happens occasionally.Therefore, how effectively to prevent from burning in hot plug process
The generation of card phenomenon, while production cost and risk are reduced, it is a technical problem to be solved urgently.
Invention content
A kind of burn-out-proof card control device of present invention offer and burn-out-proof card control method, to solve to block in hot plug process
The problem of being easy to be burned out improves the stability of user terminal, reduces production cost, decrement wind-producing danger.
To solve the above-mentioned problems, the present invention provides a kind of burn-out-proof card control devices, include the deck for installation card
With for the card power supply to the card power supply, further include：Detector, the state for detecting deck described in hot plug process become
Change, the state change of the deck includes becoming insert state from extraction state and becoming extraction state from insert state；Switch
Device, first end connects the card power supply, second end ground connection, and the control terminal of the switching device connects with the detector
It connects, for making the card power ground when the deck becomes extraction state from insert state, to discharge on the card power supply
Residual charge.
Preferably, the detector exports low level when detecting that the deck becomes insert state from extraction state
Signal is to the switching device；For the detector when detecting that the deck becomes extraction state from insert state, output is high
Level signal is to the switching device.
Preferably, the switching device includes first switching element, second switch element and third switch element；Described
One switch element is NMOS transistor, source electrode connecting detection device, grid connection input offset voltage, drain electrode connection system electricity
Source；The second switch element is PMOS transistor, and source electrode and grid connect system power supply jointly, and drain connection card power supply；
The third switch element is NMOS transistor, and source electrode ground connection, drain connection card power supply, grid connecting detection device.
Preferably, the detector exports high level when detecting that the deck becomes insert state from extraction state
Signal is to the switching device；For the detector when detecting that the deck becomes extraction state from insert state, output is low
Level signal is to the switching device.
Preferably, the switching device includes the 4th switch element, the 5th switch element and the 6th switch element；Described
Four switch elements are NMOS transistor, grid connecting detection device, source electrode ground connection, drain electrode connection system power supply；Described 5th opens
Pass element is P MOS transistors, and grid and source electrode connect system power supply jointly, and drain connection card power supply；6th switch
Element is NMOS transistor, and grid connects system power supply, and source electrode ground connection, drain connection card power supply.
The present invention also provides a kind of burn-out-proof card control methods, include the following steps：A detector is provided, for detecting heat
The state change of deck in swapping process, the state change of the deck include from extraction state becoming insert state and from insertion
State becomes extraction state；One switching device, first end connection card power supply, second end ground connection, and the switching device are provided
Control terminal connect with the detector, for making the card power supply connect when the deck becomes extraction state from insert state
Ground, to discharge the residual charge on the card power supply；Detector detects whether the deck from insert state becomes extraction state,
If so, card power supply is grounded by the switching device.
Preferably, the detector exports low level when detecting that the deck becomes insert state from extraction state
Signal is to the switching device；For the detector when detecting that the deck becomes extraction state from insert state, output is high
Level signal is to the switching device.
Preferably, further include following steps：The switching device includes first switching element, second switch element and third
Switch element；The first switching element be NMOS transistor, source electrode connecting detection device, grid connect input offset voltage,
Drain electrode connection system power supply；The second switch element is PMOS transistor, and source electrode and grid connect system power supply jointly, is leaked
Pole connection card power supply；The third switch element is NMOS transistor, and source electrode ground connection, drain connection card power supply, grid connection
Detector；When the deck is in extraction state, the first switching element and the second switch element disconnect, described
Third switching elements conductive, the card power supply are grounded by the third switch element.
Preferably, the detector exports high level when detecting that the deck becomes insert state from extraction state
Signal is to the switching device；For the detector when detecting that the deck becomes extraction state from insert state, output is low
Level signal is to the switching device.
Preferably, further include following steps：The switching device includes the 4th switch element, the 5th switch element and the 6th
Switch element；4th switch element is NMOS transistor, and grid connecting detection device, source electrode ground connection, drain connection system
Power supply；5th switch element is PMOS transistor, and grid and source electrode connect system power supply, drain electrode connection card electricity jointly
Source；6th switch element is NMOS transistor, and grid connects system power supply, and source electrode ground connection, drain connection card power supply；When
When the deck becomes extraction state from insert state, the 4th switch element and the 5th switch element disconnect, institute
The 6th switching elements conductive is stated, the card power supply is grounded by the 6th switch element.
Burn-out-proof card control device and burn-out-proof card control method provided by the invention are detecting that deck becomes from insert state
When extraction state, the residual charge on card power supply is grounded by electric discharge by switching device, is efficiently solved in hot plug process
The problem of card is easy to be burned out, improves the stability of user terminal, reduces production cost, reduce volume production risk.
Description of the drawings
Attached drawing 1 is the burn-out-proof card control apparatus structure schematic diagram of the first specific implementation mode of the invention；
Attached drawing 2 is the burn-out-proof card control device circuit figure of the first specific implementation mode of the invention；
Attached drawing 3 is the burn-out-proof card control method flow chart of the first specific implementation mode of the invention；
Attached drawing 4 is the burn-out-proof card control device circuit figure of the second specific implementation mode of the invention.
Specific implementation mode
Below in conjunction with the accompanying drawings to the specific embodiment party of burn-out-proof card control device provided by the invention and burn-out-proof card control method
Formula elaborates.
First specific implementation mode
Present embodiment provides a kind of burn-out-proof card control device, and attached drawing 1 is the first specific implementation mode of the invention
Burn-out-proof card control apparatus structure schematic diagram.As shown in Figure 1, the burn-out-proof card control device that present embodiment provides, including
For the deck 11 of installation card and for the card power supply 12 to the card power supply.Wherein, the deck 11 and the card power supply 12
Mode well-known to those skilled in the art may be used to be configured, present embodiment is not construed as limiting this.In order to anti-
Only SIM card, TF card etc. are stuck in hot plug process, and after especially extracting deck, the cacaines such as SIM card, TF card are short during card taking
Road is burned out, and the burn-out-proof card control device described in present embodiment further includes detector 13 and switching device 14.The inspection
Device 13 is surveyed, the state change of the state change for detecting deck described in hot plug process, the deck includes from extraction shape
State becomes insert state and becomes extraction state from insert state, wherein it refers to by deck to become insert state from extraction state
It is inserted into the momentary status variation of card slot, it refers to that the momentary status change of deck is extracted from card slot to become extraction state from insert state
Change；The switching device 14, the first end of the switching device 14 connect the card power supply 12, second end ground connection, and described open
The control terminal for closing device 14 is connect with the detector 13, for making when the deck 11 becomes extraction state from insert state
The card power supply 12 is grounded, to discharge the residual charge on the card power supply 12.I.e. the detector 13 detects the deck
State change, and detection information is sent to the switching device 14, the switching device 14 is determined according to the signal received
The card power supply 12 whether is set to be grounded.So, it when the deck 11 becomes extraction state from insert state, is opened by described
Close device 14 can timely by the card power supply 12 residual charge be grounded release, effectively prevent in hot plug process because
The card is with the card power supply short circuit and the problem of burn, and the burn-out-proof card control device make it is simple, it is of low cost.
In order to improve the stability of burn-out-proof card control device, and adapt to different cartridge structures, it is preferred that the inspection
Device 13 is surveyed when detecting that the deck 11 becomes insert state from extraction state, output low level signal to the switching device
14；The detector 13 is when detecting that the deck 11 becomes extraction state from insert state, output high level signal to institute
State switching device 14.
Attached drawing 2 is the burn-out-proof card control device circuit figure of the first specific implementation mode of the invention.As shown in Fig. 2, for reality
The residual charge that the existing burn-out-proof card device is quick, is released effectively on the card power supply 12, it is furthermore preferred that the switching device 14
Including first switching element T1, second switch element T2 and third switch element T3；The first switching element T1 is NMOS brilliant
Body pipe, source electrode connecting detection device 13, grid connect input offset voltage (Input off set voltage, VIO) 16, leakage
Pole connects system power supply 15；The second switch element T2 is PMOS transistor, and source electrode and grid connect system power supply jointly
15, drain electrode connection card power supply 12；The third switch element T3 is NMOS transistor, and source electrode ground connection, drain connection card power supply
12, grid connecting detection device 13.For example, when the deck 11 becomes extraction state from insert state, outside the deck 11
Portion interrupts (EINT) and is not triggered, and the detector 13 detects that the voltage at the deck 11 is high level (such as 1.8V),
Since in hot plug process, system does not power off, the input offset voltage 16 exports high level (such as 1.8V), thus first
Switch element T1 is disconnected；System power supply 15 exports high level (such as 3V), thus second switch element T2 is disconnected；The third is opened
Element T3 conductings are closed, the residual charge on the card power supply 12 passes through the T3 ground connection releases of third switch element.And work as the deck
11 from extraction state when becoming insert state, and the external interrupt triggering of the deck 11, the detector 13 detects the card
Voltage at seat 11 is low level (such as 0V), and the third switch element T3 is disconnected, the first switching element T1 and second
Switch element T2 is connected, and card power supply 12 described in 15 bio-occlusion of system power supply distributes charge.Wherein, in order to prevent because of system power supply electricity
It presses through high and burns out the second switch element T2, it is preferred that the drain electrode of the second switch element T2 and source electrode pass through one or two
Pole pipe connects.
Burn-out-proof card control device provided by the invention passes through when detecting that deck becomes extraction state from insert state
Residual charge on card power supply is grounded electric discharge by switching device, and efficiently solve in hot plug process that card is easy to be burned out asks
Topic, improves the stability of user terminal, reduces production cost, reduce volume production risk.
Present embodiment additionally provides a kind of burn-out-proof card control method, and attached drawing 3 is the first specific embodiment party of the invention
The burn-out-proof card control method flow chart of formula.As shown in figure 3, the burn-out-proof card control method that present embodiment provides includes as follows
Step：
Step S31 provides a detector, the state change for detecting deck in hot plug process, the shape of the deck
State variation includes becoming insert state from extraction state and becoming extraction state from insert state, wherein is become from extraction state
Insert state refers to that deck is inserted into the momentary status variation of card slot, and it refers to being extracted from card slot to become extraction state from insert state
The momentary status of deck changes.
Step S32 provides a switching device, and the first end of the switching device connects the card power supply, second end ground connection,
And the control terminal of the switching device is connect with the detector, for when the deck becomes extraction state from insert state
Make the card power ground, to discharge the residual charge on the card power supply.The i.e. described detector detects the state of the deck
Variation, and detection information is sent to the switching device, the switching device decides whether to make institute according to the signal received
State card power ground.
Step S33, detector detect whether the deck from insert state becomes extraction state, if so, card power supply is logical
Cross the switching device ground connection.So, when the deck becomes extraction state from insert state, pass through the switching device
Can the residual charge on the card power supply be timely grounded discharge, effectively prevented in hot plug process because of the card and institute
The problem of stating card power supply short circuit and burning, and the burn-out-proof card control device makes simply, it is of low cost.
In order to improve the stability of burn-out-proof card control device, and adapt to different cartridge structures, it is preferred that the inspection
Device is surveyed when detecting that the deck becomes insert state from extraction state, output low level signal to the switching device；Institute
Detector is stated when detecting that the deck becomes extraction state from insert state, output high level signal to the derailing switch
Part.
For the residual charge realized that the burn-out-proof card device is quick, be released effectively on the card power supply, it is furthermore preferred that institute
It further includes following steps to state burn-out-proof chucking method：The switching device includes that first switching element, second switch element and third are opened
Close element；The first switching element is NMOS transistor, source electrode connecting detection device, grid connection input offset voltage, leakage
Pole connects system power supply；The second switch element is PMOS transistor, and source electrode and grid are all connected with system power supply, and drain electrode connects
Connect card power supply；The third switch element is NMOS transistor, and source electrode ground connection, drain connection card power supply, grid connecting detection
Device；When the deck becomes extraction state from insert state, the first switching element and the second switch element are disconnected
It opens, the third switching elements conductive, the card power supply is grounded by the third switch element.For example, when the deck from
When insert state becomes extraction state, the external interrupt (EINT) of the deck is not triggered, and the detector detects described
Voltage at deck is high level (such as 1.8V), and since in hot plug process, system does not power off, thus the input biases
Voltage output high level (such as 1.8V), thus first switching element disconnects；System power supply exports high level (such as 3V), thus
Second switch element disconnects；The third switching elements conductive, the residual charge on the card power supply pass through third switch element
Ground connection release.And when the deck becomes insert state from extraction state, the external interrupt of the deck triggers, the detection
Device detects that the voltage at the deck is low level (such as 0V), and the third switch element disconnects, the first switch member
Part and second switch element conductive, card power distribution charge described in system power supply bio-occlusion.
The burn-out-proof card control device and anti-barbecue control method that present embodiment provides, are detecting deck from insertion
When state becomes extraction state, the residual charge on card power supply is grounded by electric discharge by switching device, efficiently solves and is inserted in heat
The problem of card is easy to be burned out during pulling out, improves the stability of user terminal, reduces production cost, the amount of reducing
Wind-producing danger.
Second specific implementation mode
It is repeated no more with the first specific implementation mode something in common in present embodiment, below main narration and first
The difference of specific implementation mode.
Attached drawing 4 is the burn-out-proof card control device circuit figure of the second specific implementation mode of the invention.As shown in figure 4, in order to suitable
Different cartridge structures is answered, for the detector 23 when detecting that the deck becomes insert state from extraction state, output is high
Level signal is to the switching device；The detector 23 when detecting that the deck becomes extraction state from insert state,
Low level signal is exported to the switching device.
For the residual charge realized that the burn-out-proof card device is quick, be released effectively on the card power supply, it is preferred that described
Switching device includes the 4th switch element T4, the 5th switch element T5 and the 6th switch element T6；The 4th switch element T4
For NMOS transistor, grid connecting detection device 23, source electrode ground connection, drain electrode connection system power supply 25；5th switch element
T5 is PMOS transistor, and grid and source electrode connect system power supply 25, drain electrode connection card power supply 22 jointly；The 6th switch member
Part T6 is NMOS transistor, and grid connects system power supply 25, source electrode ground connection, drain electrode connection card power supply 22.For example, working as the card
When seat becomes extraction state from insert state, the external interrupt (EINT) of the deck is triggered, and the detector 23 detects
Voltage at the deck is low level (such as 0V), and the 4th switch element T4 is disconnected；System power supply 25 exports high level
(such as 3V), the 5th switch element T5 are disconnected；The 6th switch element T6 is connected, and the residual charge on the card power supply passes through
6th switch element T6 ground connection releases.And when the deck becomes insert state from extraction state, in the outside of the deck
Disconnected not to be triggered, the detector 23 detects that the voltage at the deck is high level (such as 1.8V), the 4th switch
Element, the 5th switch element T5 and the 6th switch element T6 are connected, and card power supply 22 described in 25 bio-occlusion of system power supply distributes
Charge.Wherein, the second switch element T2 is burnt out because system power source voltage is excessively high, it is preferred that described second in order to prevent
The drain electrode of switch element T2 is connected with source electrode by a diode.
Similar, the burn-out-proof chucking method and the first specific implementation mode something in common that present embodiment provides are no longer superfluous
It states, mainly describes the difference of the burn-out-proof chucking method and the first specific implementation mode of present embodiment below.
In order to improve the stability of burn-out-proof card control device, it is preferred that the detector is detecting the deck
When becoming insert state from extraction state, output high level signal to the switching device；The detector is described in detecting
When deck becomes extraction state from insert state, output low level signal to the switching device.
For the residual charge realized that the burn-out-proof card device is quick, be released effectively on the card power supply, it is furthermore preferred that also
Include the following steps：The switching device includes the 4th switch element, the 5th switch element and the 6th switch element；Described 4th
Switch element is NMOS transistor, grid connecting detection device, source electrode ground connection, drain electrode connection system power supply；5th switch
Element is PMOS transistor, and grid and source electrode connect system power supply jointly, and drain connection card power supply；6th switch element
For NMOS transistor, grid connects system power supply, and source electrode ground connection, drain connection card power supply；When the deck is from insert state
When becoming extraction state, the 4th switch element and the 5th switch element disconnect, the 6th switching elements conductive,
The card power supply is grounded by the 6th switch element.
The burn-out-proof card control device and anti-barbecue control method that present embodiment provides, are detecting deck from insertion
When state becomes extraction state, the residual charge on card power supply is grounded by electric discharge by switching device, efficiently solves and is inserted in heat
The problem of card is easy to be burned out during pulling out, improves the stability of user terminal, reduces production cost, the amount of reducing
Wind-producing danger.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
Member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should be regarded as
Protection scope of the present invention.
Claims (10)
1. a kind of burn-out-proof card control device includes for the deck of installation card and for the card power supply to the card power supply, spy
Sign is, further includes：
Detector, the state change for detecting deck described in hot plug process, the state change of the deck include from pulling out
Doing well becomes insert state and becomes extraction state from insert state；
Switching device, first end connect the card power supply, second end ground connection, and the control terminal of the switching device and the inspection
Device connection is surveyed, for making the card power ground when the deck becomes extraction state from insert state, to discharge the card
Residual charge on power supply.
2. burn-out-proof card control device according to claim 1, which is characterized in that the detector is detecting the deck
When becoming insert state from extraction state, output low level signal to the switching device；The detector is described in detecting
When deck becomes extraction state from insert state, output high level signal to the switching device.
3. burn-out-proof card control device according to claim 2, which is characterized in that the switching device includes first switch member
Part, second switch element and third switch element；The first switching element be NMOS transistor, source electrode connecting detection device,
Grid connects input offset voltage, drain electrode connection system power supply；The second switch element is PMOS transistor, source electrode and grid
System power supply is extremely connected jointly, and drain connection card power supply；The third switch element is NMOS transistor, source electrode ground connection, leakage
Pole connection card power supply, grid connecting detection device.
4. burn-out-proof card control device according to claim 1, which is characterized in that the detector is detecting the deck
When becoming insert state from extraction state, output high level signal to the switching device；The detector is described in detecting
When deck becomes extraction state from insert state, output low level signal to the switching device.
5. burn-out-proof card control device according to claim 4, which is characterized in that the switching device includes the 4th switch member
Part, the 5th switch element and the 6th switch element；4th switch element be NMOS transistor, grid connecting detection device,
Source electrode is grounded, drain electrode connection system power supply；5th switch element is PMOS transistor, and grid and source electrode connect and be jointly
System power supply, drain connection card power supply；6th switch element is NMOS transistor, and grid connects system power supply, and source electrode connects
Ground, drain connection card power supply.
6. a kind of burn-out-proof card control method, which is characterized in that include the following steps：
One detector is provided, the state change for detecting deck in hot plug process, the state change of the deck include from
Extraction state becomes insert state and becomes extraction state from insert state；
One switching device is provided, the first end connection card power supply of the switching device, second end ground connection, and the switching device
Control terminal is connect with the detector, for making the card power supply connect when the deck becomes extraction state from insert state
Ground, to discharge the residual charge on the card power supply；
Detector detects whether the deck from insert state becomes extraction state, if so, card power supply passes through the derailing switch
Part is grounded.
7. burn-out-proof card control method according to claim 6, which is characterized in that the burn-out-proof card control method further include as
Lower step：The detector is when detecting that the deck becomes insert state from extraction state, output low level signal to institute
State switching device；The detector exports high level signal when detecting that the deck becomes extraction state from insert state
To the switching device.
8. burn-out-proof card control method according to claim 7, which is characterized in that further include following steps：
The switching device includes first switching element, second switch element and third switch element；The first switching element
For NMOS transistor, source electrode connecting detection device, grid connects input offset voltage, drain electrode connection system power supply；Described second
Switch element is PMOS transistor, and source electrode and grid connect system power supply jointly, and drain connection card power supply；The third switch
Element is NMOS transistor, and source electrode ground connection, drain connection card power supply, grid connecting detection device；
When the deck becomes extraction state from insert state, the first switching element and the second switch element are disconnected
It opens, the third switching elements conductive, the card power supply is grounded by the third switch element.
9. burn-out-proof card control method according to claim 6, which is characterized in that the burn-out-proof card control method further include as
Lower step：The detector is when detecting that the deck becomes insert state from extraction state, output high level signal to institute
State switching device；The detector exports low level signal when detecting that the deck becomes extraction state from insert state
To the switching device.
10. burn-out-proof card control method according to claim 9, which is characterized in that further include following steps：
The switching device includes the 4th switch element, the 5th switch element and the 6th switch element；4th switch element
For NMOS transistor, grid connecting detection device, source electrode ground connection, drain electrode connection system power supply；5th switch element is
PMOS transistor, grid and source electrode connect system power supply jointly, and drain connection card power supply；6th switch element is NMOS
Transistor, grid connect system power supply, and source electrode ground connection, drain connection card power supply；
When the deck becomes extraction state from insert state, the 4th switch element and the 5th switch element are disconnected
It opens, the 6th switching elements conductive, the card power supply is grounded by the 6th switch element.
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| CN201710181449.6A CN108628788A (en) | 2017-03-24 | 2017-03-24 | Burn-out-proof card control device and burn-out-proof card control method |
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| CN201710181449.6A CN108628788A (en) | 2017-03-24 | 2017-03-24 | Burn-out-proof card control device and burn-out-proof card control method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110323727A (en) * | 2019-07-15 | 2019-10-11 | 华勤通讯技术有限公司 | A kind of electrical overstress protection circuit and terminal |
| CN112463694A (en) * | 2020-12-11 | 2021-03-09 | 苏州浪潮智能科技有限公司 | Board hot plug control method and system |
| CN114389247A (en) * | 2022-01-17 | 2022-04-22 | 苏州联讯仪器有限公司 | Hot plug protection device, method, equipment and medium |
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| CN106054681A (en) * | 2016-07-29 | 2016-10-26 | 维沃移动通信有限公司 | Card inserting and plugging safe control circuit and method and mobile terminal |
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| US20090059633A1 (en) * | 2005-04-15 | 2009-03-05 | Kabushiki Kaisha Yaskawa Denki | Matrix converter apparatus |
| JP2010011118A (en) * | 2008-06-27 | 2010-01-14 | Ricoh Co Ltd | Capacitor circuit equipped with capacitor consisting of mos capacitance, variable capacitance circuit using the capacitor circuit, resonance circuit using the variable capacitance circuit, and testing method for the capacitor circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110323727A (en) * | 2019-07-15 | 2019-10-11 | 华勤通讯技术有限公司 | A kind of electrical overstress protection circuit and terminal |
| CN110323727B (en) * | 2019-07-15 | 2022-01-28 | 华勤技术股份有限公司 | Electric overstress protection circuit and terminal |
| CN112463694A (en) * | 2020-12-11 | 2021-03-09 | 苏州浪潮智能科技有限公司 | Board hot plug control method and system |
| CN114389247A (en) * | 2022-01-17 | 2022-04-22 | 苏州联讯仪器有限公司 | Hot plug protection device, method, equipment and medium |
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