CN106451400B - A kind of protection circuit and method of supplying power to - Google Patents
A kind of protection circuit and method of supplying power to Download PDFInfo
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- CN106451400B CN106451400B CN201611066988.7A CN201611066988A CN106451400B CN 106451400 B CN106451400 B CN 106451400B CN 201611066988 A CN201611066988 A CN 201611066988A CN 106451400 B CN106451400 B CN 106451400B
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000001514 detection method Methods 0.000 claims abstract description 100
- 239000003990 capacitor Substances 0.000 abstract description 25
- 238000012360 testing method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 4
- 238000003780 insertion Methods 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
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Abstract
The embodiment of the invention provides a kind of protection circuit and method of supplying power to.On the one hand, protection circuit provided in an embodiment of the present invention, is arranged in the deck of terminal, and the circuit includes: detection circuit and switching circuit；The switching circuit includes switch chip and first capacitor；The first interface of the switch chip connects the output end of the detection circuit；The general supply of terminal where the second interface of the switch chip connects the deck and the side for connecting the first capacitor, the other side ground connection of the first capacitor；The third interface of the switch chip connects the specified power supply of the deck；4th interfacing ground of the switch chip.Therefore, technical solution provided in an embodiment of the present invention is able to solve in the prior art when Kato is not fully inserted into deck, and inside SIM card has the greater risk being burned out.
Description
[ technical field ] A method for producing a semiconductor device
The present invention relates to the field of communications technologies, and in particular, to a protection circuit and a power supply method.
[ background of the invention ]
With the development of communication technology, a two-out-of-three Card socket is generally set in a terminal, and the Card socket is used in conjunction with a Card holder, so that a user can place a suitable Secure data Memory Card (SD Card) and/or a Subscriber identity Module (SIM Card) in the Card holder according to the user's needs, and then insert the Card holder into the Card socket for use. Specifically, please refer to fig. 1, which is a schematic diagram of a card holder for placing an SD card and a SIM card in the prior art. As shown in fig. 1, the P4 on the card holder corresponds to the power pin on the card holder for supplying power to the SD card; p6 on the card holder corresponds to the ground pin on the card holder. As shown in fig. 1, during the process of inserting the card holder into the card socket shown in fig. 1, the SIM card inside the card holder may contact and form a loop with the power pin corresponding to P4 and the ground pin corresponding to P6 on the card socket.
In the process of implementing the invention, the inventor finds that at least the following problems exist in the prior art:
in the prior art, the power supply voltage for supplying power to the SD card is 3V, and the power supply voltage for supplying power to the SIM card is 1.8V. When the card holder shown in fig. 1 is inserted into the card socket, especially when the card holder is only inserted into half of the card socket and the card holder is not completely inserted into the card socket, the inner SIM card is easily conducted with the power pin and the ground pin on the card socket, resulting in a greater risk of burning the inner SIM card.
[ summary of the invention ]
In view of this, embodiments of the present invention provide a protection circuit and a power supply method, so as to solve the problem in the prior art that when a card holder is not completely inserted into a card socket, an inner SIM card is at a high risk of being burned.
In one aspect, an embodiment of the present invention provides a protection circuit, which is disposed in a card socket of a terminal, where the protection circuit includes: a detection circuit and a switching circuit; the switch circuit comprises a switch chip and a first capacitor;
the first interface of the switch chip is connected with the output end of the detection circuit;
a second interface of the switch chip is connected with a total power supply of a terminal where the card holder is located and is connected with one side of the first capacitor, and the other side of the first capacitor is grounded;
a third interface of the switch chip is connected with a specified power supply of the card holder;
and the fourth interface of the switch chip is grounded.
The above-described aspects and any possible implementations further provide an implementation, where the detection circuit includes: the detection pin, the test pin, the second capacitor and the resistor are connected with the shell of the card holder;
the detection pin is connected with one side of the resistor, and the other side of the resistor is connected with a main power supply of a terminal where the card holder circuit is located;
the detection pin is also connected with one side of the second capacitor, and the other side of the second capacitor is grounded;
the detection pin is also connected with a test pin.
The above-described aspect and any possible implementation manner further provide an implementation manner that the first interface of the switch chip is further connected to the test pin.
One of the above technical solutions has the following beneficial effects:
the protection circuit provided in the embodiment of the present invention is disposed in a card socket of a terminal, and the circuit includes: a detection circuit and a switching circuit; the switch circuit comprises a switch chip and a first capacitor; the first interface of the switch chip is connected with the output end of the detection circuit; a second interface of the switch chip is connected with a total power supply of a terminal where the card holder is located and is connected with one side of the first capacitor, and the other side of the first capacitor is grounded; a third interface of the switch chip is connected with a specified power supply of the card holder; and the fourth interface of the switch chip is grounded. In the embodiment of the invention, the switch chip is positioned on the connection branch of the main power supply of the terminal and the power supply for supplying power to the SD card, and then when the switch chip is switched on, the main power supply of the terminal can supply power to the power supply of the SD card through the connection branch, and at the moment, a power supply pin for supplying power to the SD card on the card seat is electrified; in the embodiment of the invention, the switch chip is determined to be conducted or not according to the output signal of the detection circuit, so that the protection circuit provided by the embodiment of the invention can ensure that the switch chip is not conducted when the detection circuit detects that the card holder is not completely inserted into the card holder, and thus, a power supply pin for supplying power to the SD card on the card holder is not electrified, and the risk of burning the SIM card in a half-insertion state of the card holder is reduced; only when the detection circuit detects that the card support is completely inserted into the card seat, the switch chip is conducted, and at the moment, the power pin for supplying power to the SD card on the card seat is electrified. Therefore, the technical scheme provided by the embodiment of the invention can solve the problem that the SIM card at the inner side has a greater risk of being burnt when the card holder is not completely inserted into the card seat in the prior art.
In another aspect, an embodiment of the present invention provides a power supply method, which is implemented in the protection circuit described above; the method comprises the following steps:
the detection circuit outputs a signal according to a detection result of whether the card holder is completely inserted into the card seat;
and the switch chip controls a power supply circuit between a total power supply of a terminal where the card holder is positioned and a specified power supply of the card holder according to the output signal of the detection circuit.
The above-mentioned aspect and any possible implementation manner further provide an implementation manner, in which the detection circuit outputs a signal according to a detection result of whether the card holder is completely inserted into the card socket, and the detection circuit includes:
when the detection circuit detects that the card holder is not completely inserted into the card seat, the output signal of the detection circuit is at a low level; or,
when the detection circuit detects that the card holder is completely inserted into the card seat, the output signal of the detection circuit is at a high level.
As for the above-mentioned aspect and any possible implementation manner, there is further provided an implementation manner in which the switch chip controls a power supply circuit between a total power supply of the terminal in which the card socket is located and a specific power supply of the card socket according to an output signal of the detection circuit, including:
when the output signal of the detection circuit is at a low level, the switch chip is not turned on, so that a power supply circuit between a main power supply of a terminal where the card holder is located and the specified power supply of the card holder is turned off, and the specified power supply of the card holder is not electrified.
As for the above-mentioned aspect and any possible implementation manner, there is further provided an implementation manner in which the switch chip controls a power supply circuit between a total power supply of the terminal in which the card socket is located and a specific power supply of the card socket according to an output signal of the detection circuit, including:
when the output signal of the detection circuit is at a high level, the switch chip is turned on, so that the power supply circuit between the main power supply of the terminal where the card holder is located and the specified power supply of the card holder is communicated, and the main power supply of the terminal where the card holder is located supplies power to the specified power supply of the card holder through the switch chip.
One of the above technical solutions has the following beneficial effects:
the power supply method provided by the embodiment of the invention is implemented in the protection circuit; the method comprises the following steps: the detection circuit outputs a signal according to a detection result of whether the card holder is completely inserted into the card holder, and then the switch chip controls a power supply circuit between a total power supply of a terminal where the card holder is located and a specified power supply of the card holder according to the output signal of the detection circuit. In the embodiment of the invention, the switch chip is positioned on the connection branch of the main power supply of the terminal and the power supply for supplying power to the SD card, and then when the switch chip is switched on, the main power supply of the terminal can supply power to the power supply of the SD card through the connection branch, and at the moment, a power supply pin for supplying power to the SD card on the card seat is electrified; in the embodiment of the invention, the switch chip is determined to be conducted or not according to the output signal of the detection circuit, so that the protection circuit provided by the embodiment of the invention can ensure that the switch chip is not conducted when the detection circuit detects that the card holder is not completely inserted into the card holder, and thus, a power supply pin for supplying power to the SD card on the card holder is not electrified, and the risk of burning the SIM card in a half-insertion state of the card holder is reduced; only when the detection circuit detects that the card support is completely inserted into the card seat, the switch chip is conducted, and at the moment, the power pin for supplying power to the SD card on the card seat is electrified. Therefore, the technical scheme provided by the embodiment of the invention can solve the problem that the SIM card at the inner side has a greater risk of being burnt when the card holder is not completely inserted into the card seat in the prior art.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.
FIG. 1 is a diagram of a prior art card holder with an SD card and a SIM card placed therein;
fig. 2 is a first schematic diagram of a protection circuit according to an embodiment of the invention;
FIG. 3 is a second schematic diagram of a protection circuit according to an embodiment of the invention;
fig. 4 is a schematic flow chart of a power supply method according to an embodiment of the present invention.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be understood that although the terms first, second, third, etc. may be used to describe capacitances and the like in embodiments of the present invention, these capacitances and the like should not be limited to these terms. These terms are only used to distinguish capacitances and the like from each other. For example, the first capacitor may also be referred to as a second capacitor, and similarly, the second capacitor may also be referred to as a first capacitor without departing from the scope of embodiments of the present invention.
The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.
Example one
In order to solve the above problems in the prior art, an embodiment of the present invention provides a protection circuit, where the protection circuit is disposed in a card socket of a terminal.
Specifically, referring to fig. 2, which is a first schematic diagram of a protection circuit according to an embodiment of the present invention, as shown in fig. 2, the protection circuit may include: a detection circuit 21 and a switching circuit 22.
As shown in fig. 2, the switch circuit 22 may include, but is not limited to: a switch chip 221 and a first capacitor 222.
Specifically, as shown in fig. 2, the first interface 2211 of the switch chip 221 is connected to the output end of the detection circuit 21, the second interface 2212 of the switch chip 221 is connected to the total power supply of the terminal of the card socket and is connected to one side of the first capacitor 222, the other side of the first capacitor 222 is grounded, the third interface 2213 of the switch chip 221 is connected to the specified power supply of the card socket, and the fourth interface 2214 of the switch chip 221 is grounded.
It should be noted that, in the embodiment of the present invention, the specified power source of the card socket includes a power source in the card socket for supplying power to the SD card. It is understood that the card socket may further include other power supplies, for example, a power supply for supplying power to the inner SIM card, and this is not particularly limited in the embodiment of the present invention.
As shown in fig. 2, in the embodiment of the present invention, the second interface 2212 of the switch chip 221 is connected to a main power supply of the terminal, and the third interface 2213 is connected to a power supply for supplying power to the SD card, so that when the switch chip 221 is turned on, the main power supply of the terminal can be connected to the power supply for supplying power to the SD card.
Specifically, in the embodiment of the present invention, the first interface 2211 of the switch chip 221 is connected to the output end of the detection circuit 21, so that the on/off of the switch chip can be determined according to the output signal of the detection circuit 21.
In a specific implementation process, as shown in fig. 2, when the output signal of the detection circuit 21 is at a low level, the switch chip 221 is not turned on, so that the power supply circuit between the total power supply of the terminal where the card socket is located and the designated power supply of the card socket is turned off, and the designated power supply of the card socket is not powered on.
In another specific implementation process, as shown in fig. 2, when the output signal of the detection circuit 21 is at a high level, the switch chip 221 is turned on, so that the power supply circuit between the total power supply of the terminal where the card socket is located and the specified power supply of the card socket is connected, and the total power supply of the terminal where the card socket is located supplies power to the specified power supply of the card socket through the switch chip.
It should be noted that, in the embodiment of the present invention, the output signal of the detection circuit 21 is related to whether the card holder is completely inserted into the card socket. Specifically, please refer to fig. 3, which is a second schematic diagram of the protection circuit according to the embodiment of the present invention, as shown in fig. 3, the protection circuit includes a detection circuit 31 and a switch circuit 32.
Specifically, as shown in fig. 3, the detection circuit 31 includes: a detection pin 311, a test pin 312, a second capacitor 313 and a resistor 314 connected with the shell of the card socket;
the detection pin 311 is connected with one side of the resistor 314, and the other side of the resistor 314 is connected with a main power supply of a terminal where the card seat is located;
the detection pin 311 is further connected to one side of the second capacitor 313, and the other side of the second capacitor 313 is grounded;
the detect pin 311 is also connected to a test pin 312.
Specifically, as shown in fig. 3, the first interface of the switch chip 321 is also connected to the test pin 312.
Specifically, in the protection circuit shown in fig. 3, the detection pin 311 is located at the innermost portion of the card socket, and when the card holder is not completely inserted into the card socket, the detection pin 311 contacts with the housing of the card socket and is short-circuited, so that the level of the test pin 312 connected to the detection pin 311 is low. At this time, the switch chip 321 in the switch circuit 32 is turned off after receiving the low level signal, and thus the voltage of the designated power supply for supplying power to the SD card is 0V, and at this time, the designated power supply is not energized.
Alternatively, as shown in fig. 3, in the protection circuit, the detection pin 311 is located at the innermost portion of the card socket, when the card holder is completely inserted into the card socket, the card holder will push the detection pin 311 open, at this time, the detection pin 311 is separated from the housing of the card socket, since the detection pin 311 is connected to the main power supply of the terminal through the resistor 314, at this time, the level of the test pin 312 connected to the detection pin 311 is at a high level. At this time, since the switch chip 321 in the switch circuit 32 is turned on upon receiving the high level signal, the voltage of the predetermined power supply for supplying power to the SD card is not 0, and at this time, the predetermined power supply is turned on.
It should be noted that the circuit structure of the detection circuit 31 shown in fig. 3 is only a specific implementation manner for detecting whether the card holder is completely inserted into the card socket in the embodiment of the present invention; in an actual implementation process, the detection circuit may have another circuit structure, for example, a sensor transmits a detection signal, which is not particularly limited in the embodiment of the present invention.
It can be understood that, in the embodiment of the present invention, the detection circuit is configured to determine whether the card holder is completely inserted into the card socket, and the switch circuit is configured to switch on the total power supply of the terminal and the specified power supply for supplying power to the SD card when the detection circuit detects that the card holder is completely inserted into the card socket; and the switch circuit is also used for not conducting a total power supply of the terminal and a specified power supply for supplying power to the SD card when the detection circuit detects that the card holder is not completely inserted into the card holder. So, only when the card holds in the palm when inserting the cassette completely, just can switch on for going up on the power of SD card power supply, hold in the palm the in-process of inserting the cassette or extracting the cassette at the card, do not switch on for on the power of SD card power supply, so, just avoided because the condition of burning out the SIM card that leads to for the voltage of the power of SD card power supply and the voltage difference of SIM card, the risk that inboard SIM card burns out has been reduced, when having solved in the prior art and holding in the palm not inserting the cassette completely at the card, inboard SIM card has the problem of the great risk of being burnt out.
It should be noted that the terminal according to the embodiment of the present invention may include, but is not limited to, a Personal Computer (PC), a Personal Digital Assistant (PDA), a wireless handheld device, a Tablet Computer (Tablet Computer), a mobile phone, and the like, and the terminal includes a card socket as shown in fig. 1.
The technical scheme of the embodiment of the invention has the following beneficial effects:
the protection circuit provided in the embodiment of the present invention is disposed in a card socket of a terminal, and the circuit includes: a detection circuit and a switching circuit; the switch circuit comprises a switch chip and a first capacitor; the first interface of the switch chip is connected with the output end of the detection circuit; the second interface of the switch chip is connected with a main power supply of a terminal where the card holder is positioned and is connected with one side of a first capacitor, and the other side of the first capacitor is grounded; a third interface of the switch chip is connected with a specified power supply of the card holder; and the fourth interface of the switch chip is grounded. In the embodiment of the invention, the switch chip is positioned on the connection branch of the main power supply of the terminal and the power supply for supplying power to the SD card, and then when the switch chip is switched on, the main power supply of the terminal can supply power to the power supply of the SD card through the connection branch, and at the moment, a power supply pin for supplying power to the SD card on the card seat is electrified; in the embodiment of the invention, the switch chip is determined to be conducted or not according to the output signal of the detection circuit, so that the protection circuit provided by the embodiment of the invention can ensure that the switch chip is not conducted when the detection circuit detects that the card holder is not completely inserted into the card holder, and thus, a power supply pin for supplying power to the SD card on the card holder is not electrified, and the risk of burning the SIM card in a half-insertion state of the card holder is reduced; only when the detection circuit detects that the card support is completely inserted into the card seat, the switch chip is conducted, and at the moment, the power pin for supplying power to the SD card on the card seat is electrified. Therefore, the technical scheme provided by the embodiment of the invention can solve the problem that the SIM card at the inner side has a greater risk of being burnt when the card holder is not completely inserted into the card seat in the prior art.
Example two
Based on the protection circuit provided in the first embodiment, the embodiment of the present invention provides a power supply method implemented in the protection circuit.
Specifically, please refer to fig. 4, which is a schematic flow chart of a power supply method according to an embodiment of the present invention, as shown in fig. 4, the method includes the following steps:
s401, the detection circuit outputs a signal according to the detection result of whether the card holder is completely inserted into the card seat.
S402, the switch chip controls a power supply circuit between a main power supply of the terminal where the card holder is located and the appointed power supply of the card holder according to the output signal of the detection circuit.
Specifically, in the embodiment of the present invention, the outputting, by the detection circuit, a signal according to the detection result of whether the card holder is completely inserted into the card socket includes:
when the detection circuit detects that the card holder is not completely inserted into the card seat, the output signal of the detection circuit is at a low level; or,
when the detection circuit detects that the card support is completely inserted into the card seat, the output signal of the detection circuit is high level.
Specifically, in the embodiment of the present invention, the controlling, by the switch chip, the power supply circuit between the total power supply of the terminal where the card socket is located and the specified power supply of the card socket according to the output signal of the detection circuit includes:
when the output signal of the detection circuit is at low level, the switch chip is not conducted, so that the power supply circuit between the total power supply of the terminal where the card holder is located and the appointed power supply of the card holder is disconnected, and the appointed power supply of the card holder is not electrified.
Or, the switch chip controls the power supply circuit between the total power supply of the terminal where the card socket is located and the appointed power supply of the card socket according to the output signal of the detection circuit, and further comprises:
when the output signal of the detection circuit is at a high level, the switch chip is switched on, so that the power supply circuit between the main power supply of the terminal where the card holder is located and the appointed power supply of the card holder is communicated, and the main power supply of the terminal where the card holder is located supplies power to the appointed power supply of the card holder through the switch chip.
It should be noted that the terminal according to the embodiment of the present invention may include, but is not limited to, a Personal Computer (PC), a Personal Digital Assistant (PDA), a wireless handheld device, a Tablet Computer (Tablet Computer), a mobile phone, and the like, and the terminal includes a card socket as shown in fig. 1.
For parts of the present embodiment that are not described in detail, reference may be made to the description of fig. 2.
The technical scheme of the embodiment of the invention has the following beneficial effects:
the power supply method provided by the embodiment of the invention is implemented in the protection circuit; the method comprises the following steps: the detection circuit outputs a signal according to the detection result of whether the card support is completely inserted into the card seat, and then the switch chip controls a power supply circuit between a total power supply of a terminal where the card seat is located and a specified power supply of the card seat according to the output signal of the detection circuit. In the embodiment of the invention, the switch chip is positioned on the connection branch of the main power supply of the terminal and the power supply for supplying power to the SD card, and then when the switch chip is switched on, the main power supply of the terminal can supply power to the power supply of the SD card through the connection branch, and at the moment, a power supply pin for supplying power to the SD card on the card seat is electrified; in the embodiment of the invention, the switch chip is determined to be conducted or not according to the output signal of the detection circuit, so that the protection circuit provided by the embodiment of the invention can ensure that the switch chip is not conducted when the detection circuit detects that the card holder is not completely inserted into the card holder, and thus, a power supply pin for supplying power to the SD card on the card holder is not electrified, and the risk of burning the SIM card in a half-insertion state of the card holder is reduced; only when the detection circuit detects that the card support is completely inserted into the card seat, the switch chip is conducted, and at the moment, the power pin for supplying power to the SD card on the card seat is electrified. Therefore, the technical scheme provided by the embodiment of the invention can solve the problem that the SIM card at the inner side has a greater risk of being burnt when the card holder is not completely inserted into the card seat in the prior art.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions in actual implementation, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) or a Processor (Processor) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: u disk, removable hard disk, read only memory, random access memory, magnetic or optical disk, etc. for storing program codes.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (3)
1. A method of supplying power, comprising:
the detection circuit outputs a signal according to the detection result of whether the card support is completely inserted into the card seat;
the switch chip controls a power supply circuit between a total power supply of a terminal where the card holder is located and a specified power supply of the card holder according to an output signal of the detection circuit;
the detection circuit outputs a signal according to a detection result of whether the card holder is completely inserted into the card holder, and the detection circuit comprises:
when the detection circuit detects that the card holder is not completely inserted into the card seat, the output signal of the detection circuit is at a low level; or,
when the detection circuit detects that the card holder is completely inserted into the card seat, the output signal of the detection circuit is at a high level.
2. The method of claim 1, wherein the controlling, by the switch chip, the power supply circuit between the total power supply of the terminal of the card socket and the specified power supply of the card socket according to the output signal of the detection circuit comprises:
when the output signal of the detection circuit is at a low level, the switch chip is not turned on, so that a power supply circuit between a main power supply of a terminal where the card holder is located and the specified power supply of the card holder is turned off, and the specified power supply of the card holder is not electrified.
3. The method of claim 1, wherein the controlling, by the switch chip, the power supply circuit between the total power supply of the terminal of the card socket and the specified power supply of the card socket according to the output signal of the detection circuit comprises:
when the output signal of the detection circuit is at a high level, the switch chip is turned on, so that the power supply circuit between the main power supply of the terminal where the card holder is located and the specified power supply of the card holder is communicated, and the main power supply of the terminal where the card holder is located supplies power to the specified power supply of the card holder through the switch chip.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611066988.7A CN106451400B (en) | 2016-11-28 | 2016-11-28 | A kind of protection circuit and method of supplying power to |
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| CN201611066988.7A CN106451400B (en) | 2016-11-28 | 2016-11-28 | A kind of protection circuit and method of supplying power to |
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| CN107069272B (en) * | 2017-03-13 | 2021-07-20 | 宇龙计算机通信科技(深圳)有限公司 | SIM card holder, terminal, SIM card detection method and detection device |
| CN107317897A (en) * | 2017-07-05 | 2017-11-03 | 宇龙计算机通信科技(深圳)有限公司 | Terminal deck and terminal |
| CN108401043A (en) * | 2018-02-28 | 2018-08-14 | 上海与德科技有限公司 | Burn-out-proof card circuit, method and mobile terminal based on single-pole double-throw switch (SPDT) |
| CN110221673B (en) * | 2019-06-14 | 2023-04-25 | 广东虹勤通讯技术有限公司 | Circuit and method for preventing spark during insertion of notebook computer adapter |
| CN111405103A (en) * | 2020-03-06 | 2020-07-10 | Tcl移动通信科技（宁波）有限公司 | Device, method, storage medium and mobile terminal for detecting SIM card |
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| CN105893897A (en) * | 2016-03-31 | 2016-08-24 | 努比亚技术有限公司 | Method for avoiding burning of SIM cards |
| CN206195344U (en) * | 2016-11-28 | 2017-05-24 | 深圳天珑无线科技有限公司 | Protective circuit |
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| CN105893897A (en) * | 2016-03-31 | 2016-08-24 | 努比亚技术有限公司 | Method for avoiding burning of SIM cards |
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| CN106451400A (en) | 2017-02-22 |
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