CN205335900U - Electronic equipment and externally fill electrical detection circuitry thereof - Google Patents
Electronic equipment and externally fill electrical detection circuitry thereof Download PDFInfo
- Publication number
- CN205335900U CN205335900U CN201521141247.1U CN201521141247U CN205335900U CN 205335900 U CN205335900 U CN 205335900U CN 201521141247 U CN201521141247 U CN 201521141247U CN 205335900 U CN205335900 U CN 205335900U
- Authority
- CN
- China
- Prior art keywords
- resistance
- audion
- outfan
- charging
- power management
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 54
- 238000012360 testing method Methods 0.000 claims abstract description 18
- 230000005669 field effect Effects 0.000 claims description 18
- 239000004065 semiconductor Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses an electronic equipment and externally fill electrical detection circuitry thereof wherein, should externally fill electrical detection circuitry and connect between rechargeable battery and external interface, include the access detection module that goes on detecting to external device's access situation, to the external device after inserting carry on charge management power management module and according to insert detection module's testing result control power management module carries out charge management's controller to external device, insert detection module's the sense terminal and the charging terminal connection of external interface, it is connected with the first input end of controller to insert detection module's output, the output of controller with power management module's control end is connected, power management module's the output and the charging terminal connection of external interface. Electrical detection circuitry is externally filled through the aforesaid and the automatic identification to external device can be realized to the external device after inserting charges to being automatic.
Description
Technical field
This utility model relates to electronic circuit technology field, particularly to a kind of electronic equipment and external charging detecting circuit thereof。
Background technology
At present, it is generally adopted charger baby electronic equipment is charged, and electronic equipment is when needing to realize the outer playing function of sound or the WiFi function of relatively high power, then need additionally to connect the equipment such as Bluetooth audio device, bluetooth WiFi, so that the line numerous and complicated between electronic equipment。At present, progress along with science and technology, avoid the generation of the problems referred to above, the electronic equipment such as Bluetooth audio device, bluetooth WiFi is added external charge function, but when the electronic equipment such as Bluetooth audio device, bluetooth WiFi is in holding state, external equipment could be charged after then needing user's wake-up device, very inconvenient。
Utility model content
Main purpose of the present utility model is to propose a kind of externally charging detecting circuit, it is intended to automatically identify the external equipment of electronic equipment, and external equipment is charged。
For achieving the above object, the external charging detecting circuit that the utility model proposes, it is connected between rechargeable battery and external interface, this external charging detecting circuit includes the access detection module that the access situation of external equipment is detected, external equipment after accessing is charged the power management module of management, and the testing result according to described access detection module controls the controller that external equipment is charged managing by described power management module, the described test side of access detection module is connected with the charging end of external interface, the described outfan of access detection module is connected with the first input end of controller, the outfan of described controller is connected with the control end of described power management module, the outfan of described power management module is connected with the charging end of external interface。
Preferably, described access detection module includes the first audion, the second audion, the first diode, the first resistance, the second resistance, the 3rd resistance and the 4th resistance, the base stage of described first audion is connected with the charging end of external interface through the first resistance, the colelctor electrode of described first audion connects through the base stage of the second resistance and the second audion, and the described emitter stage of the first audion is connected with the outfan of rechargeable battery；The colelctor electrode of described second audion is connected with one end of the first input end of described controller, the 3rd resistance, the grounded emitter of described second audion；The other end of described 3rd resistance is connected with the outfan of rechargeable battery；The anode of described first diode is connected with the outfan of rechargeable battery through the 4th resistance, and the described negative electrode of the first diode is connected with the charging end of external interface。
Preferably, described first audion is PNP type triode, and described second audion is NPN type triode。
Preferably, described power management module includes the first field effect transistor, the 3rd audion, the 5th resistance, the 6th resistance and the 7th resistance, the grid of described first field effect transistor is connected with described one end of 5th resistance, one end of the 6th resistance respectively, the other end of described 5th resistance is connected with the colelctor electrode of described 3rd audion, the other end of described 6th resistance is connected with the described drain electrode of the first field effect transistor, the power end of power management module respectively, and the described source electrode of the first field effect transistor is connected with the charging end of external interface；The base stage of described 3rd audion is connected with the outfan of described controller through the 7th resistance, the grounded emitter of described 3rd audion。
Preferably, described first field effect transistor is P-channel metal-oxide-semiconductor, and described 3rd audion is NPN type triode。
Preferably, this external charging detecting circuit also includes the current detection module for the charging current of external equipment is detected, the test side of described current detection module is connected between the outfan of power management module and the charging end of external interface, the outfan of described current detection module is connected with the second input of controller, when described charging current is less than the electric current of controller internal preset, described controller controls described power management module and cuts out the charging to external equipment。
Preferably, described current detection module includes operational amplifier, 8th resistance, 9th resistance, tenth resistance, 11st resistance and the 12nd resistance, described 8th resistance is connected between the charging end of external interface and the outfan of power management module, one end the 9th resistance of described 8th resistance is connected with the normal phase input end of operational amplifier, the other end is connected with the inverting input of operational amplifier through the tenth resistance, the inverting input of described operational amplifier is connected with the outfan of operational amplifier through the 11st resistance, the outfan of described operational amplifier is connected with the second input of controller through the 12nd resistance。
Preferably, described external interface is Universal USB interface。
This utility model also proposes a kind of electronic equipment, described electronic equipment includes rechargeable battery, external interface and externally charging detecting circuit, described external charging detecting circuit is connected between the outfan of rechargeable battery and external interface, described outer charging detecting circuit includes the access detection module that the access situation of external equipment is detected, external equipment after accessing is charged the power management module of management, and the testing result according to described access detection module controls the controller that external equipment is charged managing by described power management module, the described test side of access detection module is connected with the charging end of external interface, the described outfan of access detection module is connected with the first input end of controller, the outfan of described controller is connected with the control end of described power management module, the outfan of described power management module is connected with the charging end of external interface。
Technical solutions of the utility model are by adopting external charging detecting circuit, by accessing whether detection module detection external interface accesses external equipment, when accessing detection module and access external equipment being detected, then this testing result is fed back to controller by the first input end of controller, controller then sends and controls signal to power management module, now, external equipment external interface accessed by power management module is charged by rechargeable battery；When access detection module detects and do not access external equipment, then controller will be remained stationary, and triggering voltage management module is not operated。Thus realizing the automatic identification of the access situation to external equipment, and the external equipment after accessing is charged management automatically。
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to the structure according to these accompanying drawings obtains other accompanying drawing。
Fig. 1 is the module diagram of this utility model external charging detecting circuit one embodiment；
Fig. 2 is the circuit structure connection diagram in Fig. 1；
Fig. 3 is the module diagram of external another embodiment of charging detecting circuit of this utility model；
Fig. 4 is the circuit structure connection diagram in Fig. 3。
Drawing reference numeral illustrates:
The realization of this utility model purpose, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing。
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present utility model, rather than whole embodiments。Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of this utility model protection。
Need explanation, in this utility model embodiment, directional instruction (such as up, down, left, right, before and after ...) is only for explaining relative position relation between each parts, motion conditions etc. under a certain particular pose (as shown in drawings), if this particular pose changes, then directionality instruction also correspondingly changes therewith。
It addition, relate to the description of " first ", " second " etc. in this utility model only for descriptive purposes, and it is not intended that instruction or imply its relative importance or the implicit quantity indicating indicated technical characteristic。Thus, define " first ", the feature of " second " can express or implicitly include at least one this feature。Additionally; technical scheme between each embodiment can be combined with each other; but must be based on those of ordinary skill in the art are capable of; when technical scheme combination occur conflicting maybe cannot realize time will be understood that the combination of this technical scheme is absent from, also not this utility model require protection domain within。
The utility model proposes a kind of externally charging detecting circuit。
It it is the module diagram of this utility model external charging detecting circuit one embodiment referring to figs. 1 through 4, Fig. 1；Fig. 2 is the circuit structure connection diagram in Fig. 1；Fig. 3 is the module diagram of external another embodiment of charging detecting circuit of this utility model；Fig. 4 is the circuit structure connection diagram in Fig. 3。
In this utility model embodiment, as described in Figure 1, this external charging detecting circuit 10 is connected between the rechargeable battery 20 of electronic equipment and external interface 30, it includes the access detection module 11 that the access situation of external equipment is detected, external equipment after accessing is charged the power management module 12 of management, and the testing result according to described access detection module 11 controls the controller 13 that external equipment is charged managing by described power management module 12, the test side of described access detection module 11 is connected with the charging end VCC of external interface 30, the outfan of described access detection module 11 is connected with the first input end I/O1 of controller 13, the outfan I/O2 of described controller 13 is connected with the control end of described power management module 12, the outfan of described power management module 12 is connected with the charging end VCC of external interface 30。
By adopting access detection module 11, technical solutions of the utility model detect whether external interface 30 accesses external equipment, when accessing detection module 11 and access external equipment being detected, then this testing result is fed back to controller 13 by the first input end I/O1 of controller 13, controller 13 then sends and controls signal to power management module 12, now, external equipment external interface 30 accessed by power management module 12 is charged by rechargeable battery 20；When access detection module 11 detects and do not access external equipment, then controller 13 will be remained stationary, and triggering voltage management module 12 is not operated。
Specifically, above-mentioned testing result, control signal preferably employ level signal and realize, and external interface 30 preferably employs Universal USB interface。
Preferably, as described in Figure 2, described access detection module 11 includes the first audion Q1, the second audion Q2, the first diode D1, the first resistance R1, the second resistance R2, the 3rd resistance R3 and the 4th resistance R4, the base stage of described first audion Q1 is connected with the charging end VCC of external interface 30 through the first resistance R1, the colelctor electrode of described first audion Q1 connects through the base stage of the second resistance R2 and the second audion Q2, and the described emitter stage of the first audion Q1 is connected with the outfan V_BAT of rechargeable battery 20；The colelctor electrode of described second audion Q2 is connected with one end of the first input end I/O1 of described controller 13, the 3rd resistance R3, the grounded emitter of described second audion Q2；The described other end of the 3rd resistance R3 is connected with the outfan V_BAT of rechargeable battery 20；The anode of described first diode D1 is connected with the outfan V_BAT of rechargeable battery 20 through the 4th resistance R4, and the described negative electrode of the first diode D1 is connected with the charging end VCC of external interface 30。
When not accessing external equipment, namely when system is in holding state, the outfan I/O2 output low level signal of controller 13 is to power management module 12, control power management module 12 not work, now, the charging end VCC of external interface 30 is vacant state, the current potential of the test side then accessing detection module 11 is identical with the current potential of rechargeable battery 20 outfan, the base stage of the first audion Q1 is high level, in the present embodiment, the first highly preferred employing PNP type triode of audion Q1, second audion Q2 preferably employs NPN type triode, thus the first audion Q1, second audion Q2 is in cut-off state, then now the outfan V_BAT of rechargeable battery 20 exports high level to controller 13 through accessing detection module 11, controller 13 receives this high level signal, then maintain output low level signal to power management module 12, will not triggering voltage management module 12 externally be charged。
When accessing external equipment, now the charging end VCC of external interface 30 is through external equipment ground connection, then, the current potential of the test side accessing detection module 11 is also low level, and namely the base stage of the first audion Q1 is low level, and the transmitting extremely high level of the first audion Q1, then the first audion Q1 conducting, the base potential making the second diode being drawn high, the second diode is also switched on, so that the level signal accessing the outfan of detection module 11 is converted to low level signal by high level signal。Now, the current potential of the outfan V_BAT of rechargeable battery 20 is higher than the current potential of the test side accessing detection module 11 so that the outfan V_BAT of rechargeable battery 20 flows through electric current through the 4th resistance R4, the first diode D1；Controller 13, according to the low level signal accessing detection module 11 output, will export high level signal to power management module 12, and triggering voltage management module 12 works, and external equipment is charged management。
Preferably, described power management module 12 includes the first field effect transistor Q4, 3rd audion Q3, 5th resistance R5, 6th resistance R6 and the 7th resistance R7, the grid of described first field effect transistor Q4 respectively with one end of described 5th resistance R5, one end of 6th resistance R6 connects, the other end of described 5th resistance R5 is connected with the colelctor electrode of described 3rd audion Q3, the other end of described 6th resistance R6 respectively with the drain electrode of described first field effect transistor Q4, the power end of power management module 12 connects, the source electrode of described first field effect transistor Q4 is connected with the charging end VCC of external interface 30；The base stage of described 3rd audion Q3 is connected through the outfan I/O2 of the 7th resistance R7 with described controller 13, the grounded emitter of described 3rd audion Q3。
When not accessing external equipment, controller 13 output low level is to power management module 12, namely the base stage of the 3rd audion Q3 is low level, in the present embodiment, the 3rd audion Q3 preferably employs NPN type triode, then the 3rd audion Q3 cut-off, then the first field effect transistor Q4 is also cut-off state accordingly, then being formed without path between power end and the external-connected port of power management module 12, namely power management module 12 now will not externally discharge, and system keeps holding state。
When accessing external equipment, the outfan I/O2 of controller 13 is converted to high level signal by low level signal, thus the base stage of the 3rd audion Q3 is high level, then the 3rd audion Q3 conducting, promote the grid of the first field effect transistor Q4 down for low level signal, in the present embodiment, first field effect transistor Q4 preferably employs P-channel metal-oxide-semiconductor, then the first field effect transistor Q4 conducting, thus forming path between the power end of power management module 12 and external-connected port, external equipment will be charged management by power management module 12。
Specifically, the outfan V_BAT of rechargeable battery 20 can through the power end of a booster circuit output to power management module 12, and in the present embodiment, the power end of power management module 12 preferably employs 5V voltage。
Further, as described in Figure 3, this external charging detecting circuit 10 also add the current detection module 14 for the charging current of external equipment is detected on the basis of above-described embodiment, the test side of described current detection module 14 is connected between the outfan of power management module 12 and the charging end VCC of external interface 30, the outfan of described current detection module 14 is connected with the second input I/O3 of controller 13, when described charging current is less than the electric current of controller 13 internal preset, described controller 13 controls described power management module 12 and cuts out the charging to external equipment。
By the detection to charging current, it is possible to judge whether charging process completes rapidly。When completing the charging to external equipment, the charging current value that this current detection module 14 detects is by less than the pre-set current value within controller 13, then now controller 13 judges that external equipment has completed charging, thus outputing control signals to power management module 12, close the charging to external equipment, the holding state of recovery system。
Preferably, as described in Figure 4, described current detection module 14 includes operational amplifier U1, 8th resistance R8, 9th resistance R9, tenth resistance R10, 11st resistance R11 and the 12nd resistance R12, described 8th resistance R8 is connected between the charging end VCC of external interface 30 and the outfan of power management module 12, the normal phase input end of one end the 9th resistance R9 and operational amplifier U1 of described 8th resistance R8 is connected, the other end is connected through the inverting input of the tenth resistance R10 and operational amplifier U1, the inverting input of described operational amplifier U1 is connected through the outfan of the 11st resistance R11 and operational amplifier U1, the outfan of described operational amplifier U1 is connected with the second input I/O3 of controller 13 through the 12nd resistance R12。
The change of charging current can be converted into the change in pressure drop on the 8th resistance R8, in order to degree of accuracy and low-power consumption consider, usual 8th resistance R8 adopts the resistance of low resistance, thus the change in pressure drop on the 8th resistance R8 is faint, now by this change in pressure drop signal is transferred to operational amplifier U1 be amplified process after, so that it may accurately determined whether charging process。Generally, the amplification of this operational amplifier U1 is 50-100 times and can meet requirement。
Specifically, when the change in pressure drop signal that controller 13 accepts is less than its internal preset value, namely charging current value is less than preset charged current value, now, the outfan I/O2 of controller 13 will be converted into low level signal by high level signal, externally be charged thus closing power management module 12。
This utility model also proposes a kind of electronic equipment, this electronic equipment includes rechargeable battery, external interface and external charging detecting circuit, the concrete structure of this external charging detecting circuit is with reference to above-described embodiment, owing to this electronic equipment have employed whole technical schemes of above-mentioned all embodiments, therefore at least having all beneficial effects that the technical scheme of above-described embodiment is brought, this is no longer going to repeat them。Wherein, external charging detecting circuit is connected between the outfan of rechargeable battery and external interface。
The foregoing is only preferred embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every under inventive concept of the present utility model; utilize the equivalent structure transformation that this utility model description and accompanying drawing content are made, or directly/be indirectly used in other relevant technical fields and be included in scope of patent protection of the present utility model。
Claims (9)
1. an external charging detecting circuit, it is connected between rechargeable battery and external interface, it is characterized in that, access detection module including what the access situation of external equipment was detected, the external equipment after accessing is charged the power management module of management and controls described power management module according to the testing result of described access detection module external equipment is charged the controller of management；The described test side of access detection module is connected with the charging end of external interface, the described outfan of access detection module is connected with the first input end of controller, the outfan of described controller is connected with the control end of described power management module, and the outfan of described power management module is connected with the charging end of external interface。
2. externally charging detecting circuit as claimed in claim 1, it is characterized in that, described access detection module includes the first audion, the second audion, the first diode, the first resistance, the second resistance, the 3rd resistance and the 4th resistance, the base stage of described first audion is connected with the charging end of external interface through the first resistance, the colelctor electrode of described first audion connects through the base stage of the second resistance and the second audion, and the described emitter stage of the first audion is connected with the outfan of rechargeable battery；The colelctor electrode of described second audion is connected with one end of the first input end of described controller, the 3rd resistance, the grounded emitter of described second audion；The other end of described 3rd resistance is connected with the outfan of rechargeable battery；The anode of described first diode is connected with the outfan of rechargeable battery through the 4th resistance, and the described negative electrode of the first diode is connected with the charging end of external interface。
3. externally charging detecting circuit as claimed in claim 2, it is characterised in that described first audion is PNP type triode, and described second audion is NPN type triode。
4. externally charging detecting circuit as claimed in claim 1, it is characterized in that, described power management module includes the first field effect transistor, 3rd audion, 5th resistance, 6th resistance and the 7th resistance, the grid of described first field effect transistor respectively with one end of described 5th resistance, one end of 6th resistance connects, the other end of described 5th resistance is connected with the colelctor electrode of described 3rd audion, the other end of described 6th resistance respectively with the drain electrode of described first field effect transistor, the power end of power management module connects, the described source electrode of the first field effect transistor is connected with the charging end of external interface；The base stage of described 3rd audion is connected with the outfan of described controller through the 7th resistance, the grounded emitter of described 3rd audion。
5. externally charging detecting circuit as claimed in claim 4, it is characterised in that described first field effect transistor is P-channel metal-oxide-semiconductor, and described 3rd audion is NPN type triode。
6. externally charging detecting circuit as claimed in claim 1, it is characterized in that, also include the current detection module for the charging current of external equipment is detected, the test side of described current detection module is connected between the outfan of power management module and the charging end of external interface, the outfan of described current detection module is connected with the second input of controller, when described charging current is less than the electric current of controller internal preset, described controller controls described power management module and cuts out the charging to external equipment。
7. externally charging detecting circuit as claimed in claim 6, it is characterized in that, described current detection module includes operational amplifier, 8th resistance, 9th resistance, tenth resistance, 11st resistance and the 12nd resistance, described 8th resistance is connected between the charging end of external interface and the outfan of power management module, one end the 9th resistance of described 8th resistance is connected with the normal phase input end of operational amplifier, the other end is connected with the inverting input of operational amplifier through the tenth resistance, the inverting input of described operational amplifier is connected with the outfan of operational amplifier through the 11st resistance, the outfan of described operational amplifier is connected with the second input of controller through the 12nd resistance。
8. the external charging detecting circuit as according to any one of claim 1 to 7, it is characterised in that described external interface is Universal USB interface。
9. an electronic equipment, described electronic equipment includes the external charging detecting circuit according to any one of rechargeable battery, external interface and claim 1 to 8, and described external charging detecting circuit is connected between the outfan of rechargeable battery and external interface。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521141247.1U CN205335900U (en) | 2015-12-31 | 2015-12-31 | Electronic equipment and externally fill electrical detection circuitry thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521141247.1U CN205335900U (en) | 2015-12-31 | 2015-12-31 | Electronic equipment and externally fill electrical detection circuitry thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205335900U true CN205335900U (en) | 2016-06-22 |
Family
ID=56209795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521141247.1U Expired - Fee Related CN205335900U (en) | 2015-12-31 | 2015-12-31 | Electronic equipment and externally fill electrical detection circuitry thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205335900U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107171407A (en) * | 2017-07-13 | 2017-09-15 | 广东小天才科技有限公司 | A kind of charging base |
| CN109030929A (en) * | 2018-07-06 | 2018-12-18 | 杰华特微电子（杭州）有限公司 | load insertion detection circuit and method |
-
2015
- 2015-12-31 CN CN201521141247.1U patent/CN205335900U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107171407A (en) * | 2017-07-13 | 2017-09-15 | 广东小天才科技有限公司 | A kind of charging base |
| CN109030929A (en) * | 2018-07-06 | 2018-12-18 | 杰华特微电子（杭州）有限公司 | load insertion detection circuit and method |
| CN109030929B (en) * | 2018-07-06 | 2024-05-24 | 杰华特微电子股份有限公司 | Load insertion detection circuit and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103064489B (en) | A kind of method and terminal of carrying out internal circuit selection according to USB interface state | |
| US20110314201A1 (en) | Method and device for identifying universal serial bus (usb) insertion or charger insertion of mobile terminal | |
| CN103683348B (en) | There is the electronic installation of power consumption detecting function | |
| CN107948799A (en) | Wireless headset and charging box | |
| CN102331834B (en) | Mobile terminal-opening control method and mobile terminal | |
| CN203759164U (en) | Circuit for detecting access state of USB load equipment | |
| CN103779906B (en) | Charge management device and system | |
| WO2019174415A1 (en) | Charging circuit and electronic cigarette | |
| CN205335900U (en) | Electronic equipment and externally fill electrical detection circuitry thereof | |
| CN109217425A (en) | A kind of charger circuit and its intelligent charge control method | |
| CN202798035U (en) | Charging mode detection circuit and mobile terminal | |
| CN209930507U (en) | A double-circuit plug detection circuitry for TWS bluetooth headset storehouse of charging | |
| CN104467167B (en) | A kind of power path management circuit | |
| CN206180986U (en) | Trigger circuit and earphone restore to throne | |
| US10432770B2 (en) | Method for providing multi-function back cover to mobile terminal and mobile terminal thereof | |
| CN203502565U (en) | Storage battery detector | |
| CN203387480U (en) | Automatic reset device | |
| CN204697033U (en) | System reset circuit and electronic equipment | |
| CN203520298U (en) | Start circuit and portable equipment | |
| CN204258758U (en) | A kind of power down does not produce the reset circuit of reset signal | |
| CN203643893U (en) | Terminal equipment | |
| CN203720253U (en) | Power-down detection circuit | |
| CN203013261U (en) | Intelligent mobile hard disk | |
| CN204462295U (en) | Auxiliary circuit is detected from equipment and insertion thereof | |
| CN204497773U (en) | A kind of OTG selective charge circuit and portable audio |
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 |
Granted publication date: 20160622 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |