CN206223895U - A kind of electric-leakage detection circuit and terminal - Google Patents
A kind of electric-leakage detection circuit and terminal Download PDFInfo
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- CN206223895U CN206223895U CN201621182075.7U CN201621182075U CN206223895U CN 206223895 U CN206223895 U CN 206223895U CN 201621182075 U CN201621182075 U CN 201621182075U CN 206223895 U CN206223895 U CN 206223895U
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Abstract
A kind of electric-leakage detection circuit and terminal that the application is provided, including：Detecting electrode P1, amplification circuit module and LED driver circuit module, the main ground plane setting spaced apart of detecting electrode P1 and terminal, form capacitive coupling, detecting electrode P1 is connected with the input of amplification circuit module, the electric signal transmission that detecting electrode P1 will be sensed is to amplification circuit module, so as to when sensing that terminal is leaked electricity, open amplification circuit module.The output end of amplification circuit module is connected with the input of LED driver circuit module, when amplification circuit module is opened, starts LED driver circuit module work, is pointed out so as to send optical signal to user, improves the security of user's using terminal.
Description
Technical field
The application is related to communication technical field, more particularly to a kind of electric-leakage detection circuit and terminal.
Background technology
The use of the communicating terminals such as current mobile phone, panel computer is increasingly popularized, and these products all use lithium ion battery
Deng rechargeable battery, it is necessary to be charged with external charger.But the charger species in society is various, and also the good and bad jumbled together, has
A little charger use times are long to produce electric leakage, and for the consideration of outward appearance and intensity, using leading to for metal-back or metal frame
News terminal such as mobile phone and panel computer also begin to increase, and these metal frames or shell typically all connect for shielding and jamproof needs
To the ground of mainboard, once external charger electric leakage, metal shell will be powered, due to the thing of causing death of leaking electricity during charging
Had been reported that during part.
At present, the communication terminal product with detection of electrical leakage is not found also on the market.In the prior art, general use is being filled
Increase earth leakage protective on electrical equipment, electric current (is usually flowed into and out not using primary winding residual current in traditional transformer
It is equal) electrical leakage detecting method, but this method cannot use in terminal, and high cost takes up too much space, and this
Method often after human body has been electrically shocked, just reminded, it is impossible to provides leakage warning, user in advance by meeting trigger protection circuit
Safety still can not be protected.
Utility model content
The main purpose of the application is to provide a kind of electric-leakage detection circuit and terminal, it is intended to which solution in the prior art cannot
The technical problem pointed out high pressure electric leakage.
This application provides a kind of electric-leakage detection circuit, including：Detecting electrode P1, amplification circuit module and LED drive
Circuit module；The detecting electrode P1 is the Copper Foil of default size, is arranged at the mainboard adjacent with the ground connection Copper Foil of terminal mainboard
On, it is insulating barrier between the detecting electrode P1 and the ground connection Copper Foil；The input of the amplification circuit module and the inspection
Electrode P1 connections are surveyed, output end is connected with the input of the LED driver circuit module.
Further, the amplification circuit module includes：N-channel insulated gate enhanced FET Q1 and resistance R1；
The grid of the enhanced FET Q1 of N-channel insulated gate is connected with the detecting electrode P1, and drain electrode drives electricity with the LED
Road module connection；The resistance R1 is connected in the grid and source electrode of the enhanced FET Q1 of the N-channel insulated gate in parallel
Between, the source electrode of the enhanced FET Q1 of N-channel insulated gate as the amplification circuit module ground terminal.
Further, the detecting electrode P1 is arranged in radome or is arranged on the internal layer of the mainboard.
Further, the amplification circuit module also includes：Unidirectional TVS pipe D1；The anode and N of the unidirectional TVS pipe D1
The source electrode connection of the enhanced FET Q1 of raceway groove insulated gate, negative electrode FET Q1's enhanced with the N-channel insulated gate
Grid is connected；Or, the amplification circuit module also includes：Two-way TVS pipe D2；The two ends of the two-way TVS pipe D2 respectively with N
Source electrode and the grid connection of the enhanced FET Q1 of raceway groove insulated gate；Or, the amplification circuit module also includes：It is pressure-sensitive
Resistance RV；The source electrode of FET Q1 enhanced with N-channel insulated gate and grid connect respectively at the two ends of the piezo-resistance RV
Connect.
Further, the LED driver circuit module includes：LED 1 and resistance R2；The light-emitting diodes
The drain electrode of the negative electrode of pipe LED1 FET Q1 enhanced with the N-channel insulated gate is connected；The LED 1
After anode is connected in series resistance R2, the positive pole of battery BAT1 is connect, the negative pole of the battery BAT1 connects the N-channel insulated gate enhancing
The source electrode of type FET Q1.
Further, also include：Photoelectrical coupler PC1, for outputing signal to terminal in；The photoelectrical coupler PC1
Input respectively the drain electrode of FET Q1 enhanced with the N-channel insulated gate and the battery BAT1 positive pole connect
Connect；The negative signal output head grounding GND of the photoelectrical coupler PC1, positive signal output end series resistor R4 is followed by the electricity of terminal
Source VDD；The positive signal of the photoelectrical coupler PC1 exports the interruption detection module of termination end.
Further, including：Electric-leakage detection circuit and the ground connection Copper Foil P1 ' being arranged on the terminal mainboard；The leakage
Power detection circuit includes：Detecting electrode P1, amplification circuit module and LED driver circuit module；The detecting electrode P1 is pre-
If the Copper Foil of size, it is arranged on the mainboard adjacent with the ground connection Copper Foil P1 ', the detecting electrode P1 and the ground connection Copper Foil
Between be insulating barrier；The input of the amplification circuit module is connected with the detecting electrode, and output end drives electricity with the LED
The input connection of road module.
Further, the amplification circuit module includes：N-channel insulated gate enhanced FET Q1 and resistance R1；
The grid of the enhanced FET Q1 of N-channel insulated gate is connected with the detecting electrode, drains and the LED drive circuit
Module is connected；The resistance R1 be connected in parallel the enhanced FET Q1 of the N-channel insulated gate grid and source electrode it
Between, the source electrode of the enhanced FET Q1 of N-channel insulated gate as the amplification circuit module ground terminal.
Further, also include：Battery BAT1, the LED driver circuit module includes：LED 1 and electricity
Resistance R2；The drain electrode of the negative electrode of the LED 1 FET Q1 enhanced with the N-channel insulated gate is connected；It is described
After the anode of LED 1 is connected in series resistance R2, the positive pole of the battery BAT1 of terminal is connect, the battery BAT1's is negative
Pole connects the source electrode of the enhanced FET Q1 of the N-channel insulated gate.
Further, also include：Interrupt detection module；The electric-leakage detection circuit also includes：Photoelectrical coupler PC1, uses
In the terminal detection module in outputing signal to terminal；The input of the photoelectrical coupler PC1 respectively with the N ditches
The drain electrode of the enhanced FET Q1 of road insulated gate and the positive pole connection of the battery BAT1；The photoelectrical coupler PC1's
Negative signal output head grounding GND, positive signal output end series resistor R4 is followed by the power vd D of terminal；The photoelectrical coupler PC1
Positive signal export termination end interruption detection module.
A kind of electric-leakage detection circuit and terminal that the application is provided, including：Detecting electrode P1, amplification circuit module and
LED driver circuit module, detecting electrode P1 and the main ground plane setting spaced apart of terminal, form capacitive coupling, detection
Electrode P1 is connected with the input of amplification circuit module, the electric signal transmission that detecting electrode P1 will be sensed to amplifying circuit mould
Block, so as to when sensing that terminal is leaked electricity, open amplification circuit module.The output end and LED drive circuit of amplification circuit module
The input connection of module, when amplification circuit module is opened, starts LED driver circuit module work, so as to send light to user
Signal is pointed out, and improves the security of user's using terminal.
Brief description of the drawings
Fig. 1 is the structured flowchart of the electric-leakage detection circuit of the application；
Fig. 2A is a kind of circuit structure diagram of electric-leakage detection circuit of the application；
Fig. 2 B are a kind of circuit structure diagram of electric-leakage detection circuit of the application；
Fig. 2 C are a kind of circuit structure diagram of electric-leakage detection circuit of the application；
Fig. 3 is another structured flowchart of the electric-leakage detection circuit of the application；
Fig. 4 is the circuit structure diagram of another electric-leakage detection circuit of the application；
Fig. 5 is the structured flowchart of the terminal of the application.
The realization of the application purpose, functional characteristics and advantage will be described further referring to the drawings in conjunction with the embodiments.
Specific embodiment
It should be appreciated that specific embodiment described herein is only used to explain the application, it is not used to limit the application.
Embodiment one：
As shown in figure 1, the application provides a kind of electric-leakage detection circuit, including：Detecting electrode P1, amplification circuit module 1 with
And LED driver circuit module 2.
Detecting electrode P1 is the Copper Foil of default size, is arranged on the mainboard adjacent with the ground connection Copper Foil of terminal mainboard, inspection
Survey between electrode P1 and the ground connection Copper Foil is insulating barrier.
The input of amplification circuit module 1 is connected with detecting electrode P1, the input of output end and LED driver circuit module 2
End connection.
It is recognised that the mainboard in terminal is usually have multilayer, the ground connection Copper Foil on each layer of mainboard links together.Inspection
It is also a Copper Foil to survey electrode P1, and the present embodiment is using the inspection on wherein one layer of mainboards of the ground connection Copper Foil P1 ' with adjacent one layer
Survey electrode P1 combinations and produce capacitive coupling, in the electric signal transmission that will be detected to electric-leakage detection circuit.It is worthy of note that, connect
Ground Copper Foil P1 ' and detecting electrode P1 is due to being separately positioned on the mainboard of adjacent two layers, thus ground connection Copper Foil P1 ' and detecting electrode
The distance between P1 can preferably produce capacitive coupling.
The electric-leakage detection circuit of the embodiment of the present application, for detecting during terminal charge whether there is electric leakage.Using detecting electrode
P1 and the main ground plane setting spaced apart of terminal, form capacitive coupling.Detecting electrode P1 connection amplification circuit modules 1
Input, the electric leakage signal that detecting electrode P1 will be sensed is transmitted to amplification circuit module 1, starts amplification circuit module 1, is amplified
After circuit module 1 starts, LED driver circuit module is switched on, so that LED driver circuit module can send optical signal, points out to use
There is electric leakage in family.
Preferably, as shown in Figure 2 A, the amplification circuit module 1 of the present embodiment includes：The enhanced field-effect of N-channel insulated gate
Pipe Q1 and resistance R1.The grid of the enhanced FET Q1 of N-channel insulated gate is connected with detecting electrode P1, and drain electrode is driven with LED
Dynamic circuit module 2 is connected.
Resistance R1 is connected in parallel between the grid of the enhanced FET Q1 of N-channel insulated gate and source electrode, and N-channel is exhausted
The source electrode of the enhanced FET Q1 of edge grid as the amplification circuit module 1 ground terminal G_DET.
The enhanced FET Q1 of N-channel insulated gate that amplification circuit module 1 is used has input impedance very high, N ditches
The input impedance of the enhanced FET Q1 of road insulated gate more than 10 megaohms, therefore, when mobile phone charges, if do not produced
Electric leakage, amplification circuit module 1 is in cut-off state, and LED driver circuit module 2 is not activated by, will not send optical signal to point out
User.When the electric leakage of certain voltage is produced when mobile phone charges, detecting electrode P1 senses the voltage signal and transmits to N-channel
The enhanced FET Q1 of insulated gate.Due to being parallel between the grid and source electrode of the enhanced FET Q1 of N-channel insulated gate
Resistance R1, grid connecting detection electrode P1, source electrode connect the ground terminal G_DET of amplification circuit module, thus it is recognised that being loaded into
Voltage on R1 is the voltage VGS between the grid of the enhanced FET Q1 of N-channel insulated gate and source electrode, as voltage VGS
During threshold voltage VGS (th) of FET Q1 enhanced more than N-channel insulated gate, the enhanced field effect of N-channel insulated gate is driven
Should pipe Q1 work, thus LED driver circuit module is also turned on, and sends optical signal, indicates to user.In one embodiment, on
The resistance of resistance R1 is stated more than 10 megaohms.
In one embodiment, order is to TVS pipe between the grid and source electrode of the enhanced FET Q1 of N-channel insulated gate
D1, FET Q1 enhanced to N-channel insulated gate is protected, and prevents the enhanced FET Q1 of N-channel insulated gate from being hit
Wear.The source electrode of the anode FET Q1 enhanced with N-channel insulated gate of unidirectional TVS pipe D1 is connected, negative electrode and N-channel insulated gate
The grid connection of enhanced FET Q1.In the present embodiment, below the junction capacity 1PF of TVS pipe D1, it is preferred that use 0.5PF
Following TVS pipe D1.
When there is significantly glitch voltage due to the interference of various circuits in circuit, TVS pipe D1 is when extremely short
It is interior to be transferred to reverse-conducting state rapidly, and by the voltage clamp of circuit on security value (s), it is exhausted so as to be effectively protected N-channel
Enhanced FET Q1 is against damages for edge grid.TVS pipe D1 was transferred to reverse blocking state again after the disturbing pulse past.
It is worthy of note that, because the input impedance of amplification circuit module is very high, electrostatic and Radio frequency interference are easily received, need
Amplifier in part is carried out into shielding processing comprising TVS pipe D1, resistance R1 and detecting electrode P1, it is preferred that detection electricity
Pole P1 is arranged in radome or is arranged on the internal layer of mainboard.
As shown in Figure 2 B, in another embodiment, amplification circuit module also includes：Two-way TVS pipe D2.
The source electrode and grid of the two ends of two-way TVS pipe D2 FET Q1 enhanced with N-channel insulated gate respectively are connected.
As shown in Figure 2 C, in another embodiment, amplification circuit module also includes：Piezo-resistance RV.
The source electrode and grid of the two ends of piezo-resistance RV FET Q1 enhanced with N-channel insulated gate respectively are connected.
In the present embodiment, LED driver circuit module 2 includes：LED 1 and resistance R2.
The drain electrode of the negative electrode of LED 1 FET Q1 enhanced with N-channel insulated gate is connected.
After the anode of LED 1 is connected in series resistance R2, the positive pole of battery BAT1, the negative pole of battery BAT1 are connect
Connect the source electrode of the enhanced FET Q1 of N-channel insulated gate.
Above-mentioned battery BAT1 is used to be powered whole electric-leakage detection circuit, in order to can not normally be used in end cell
When, electric-leakage detection circuit still can be normally carried out detection, and the battery BAT1 of the embodiment of the present application does not use battery of mobile phone, in addition
Individually using a battery as battery BAT1.In a kind of enforceable mode, the baby battery of electric-leakage detection circuit is used can not
The battery of charging, the present embodiment by battery design be user can self-changeable structure.In another embodiment, battery
The battery that BAT1 is used is rechargeable battery, increases charging circuit, and charging circuit is isolated with terminating circuit, and the present embodiment is adopted
With for example：The modes such as solar recharging, wireless charging charge to battery BAT1.
The embodiment of the present application is powered using the lithium-manganese dioxide button cell of more than 3V30mAh capacity, and battery is replaceable.
The standby current of the electric-leakage detection circuit part of the present embodiment is minimum to be can be controlled within 1uA, and a button cell is standby reachable
Several years, leakage warning continuously worked up to a few hours.
The output termination LED driver circuit module 2 of amplification circuit module 1 of the present embodiment is made electric leakage and is indicated, in the present embodiment,
The output end (i.e. the drain electrode of the enhanced FET Q1 of N-channel insulated gate) of amplification circuit module 1 connects a light emitting diode
The negative electrode of LED1, one current-limiting resistance R2 of anode series connection of LED 1 is connected to single baby battery BAT1 positive poles again
On, when the main ground connection for sensing mainboard has high pressure to leak electricity, the enhanced FET Q1 of N-channel insulated gate is opened, and is driven
Interval into amplifying, the enhanced FET Q1 drain electrodes of N-channel insulated gate are flowed through in producing electric current, namely LED 1
Electric current, LED 1 be switched on flicker, send light, it is recognised that when electrical leakage voltage it is higher, N-channel insulated gate
Voltage VGS between the grid and source electrode of enhanced FET Q1 is bigger, and then the generation electric current that drains is also bigger, and luminous two
Pole pipe LED1 brighter displays, after disappearance when leaking electricity, the automatic distinguishing of LED 1.
Embodiment two：
As shown in Figure 3 and Figure 4, the structure of the electric-leakage detection circuit in the electric-leakage detection circuit of the present embodiment and embodiment one
Essentially identical, difference is that the electric-leakage detection circuit of the present embodiment increased photo-coupler PC1, by the defeated of amplification circuit module 1
Go out signal transmission in photo-coupler PC1, photo-coupler PC1 is transmitted a signal in the central processing unit of terminal again, so as to end
Hold and judge terminal when charging with the presence or absence of electric leakage according to the output signal of detection circuit.Terminal can directly show testing result
Show to user, it is possible to send acousto-optic prompting.The present embodiment electric-leakage detection circuit increases a kind of prompting mode, if terminal is being filled
Electric leakage is there occurs when electric, user may not notice the luminous instruction of LED 1, and the present embodiment increases terminal
The mode of prompting, the mode not only pointed out is more directly perceived, and reduces the situation generation that user does not realize electric leakage prompting.
The electric-leakage detection circuit of the present embodiment also includes：Photoelectrical coupler PC1, for outputing signal to terminal in.
The input of photoelectrical coupler the PC1 drain electrode of FET Q1 enhanced with N-channel insulated gate and battery respectively
The positive pole connection of BAT1.
The negative signal output head grounding GND of photoelectrical coupler PC1, positive signal output end series resistor R4 is followed by the electricity of terminal
Source VDD.
The positive signal of photoelectrical coupler PC1 exports the interruption detection module of termination end.
It is understood that the internal structure of photo-coupler has various ways, the present embodiment is not construed as limiting to this, only lifts
Under for example：Photoelectrical coupler PC1 includes：
The light emitting diode D3 and phototriode VT1 coupled with light emitting diode D3.
It is connected with the positive pole of battery BAT1 after the cathode series resistance R3 of light emitting diode D3, the negative pole of light emitting diode D3
The drain electrode of FET Q1 enhanced with N-channel insulated gate is connected.
The grounded emitter GND of phototriode VT1, with power vd D after collector series connection resistance R4.
The colelctor electrode of phototriode VT1 connects the interruption detection module of terminal.
Above-mentioned resistance R3 is used to carry out current limliting to the electric current for flowing through the light emitting diode D3 of photoelectrical coupler PC1.Power vd D
Can directly be connected on the main battery of terminal, be same voltage domain with detection port is interrupted.
The judge module that interrupts of above-mentioned terminal is located in the central processing unit of terminal, when luminous the two of photoelectrical coupler PC1
After pole pipe D3 receives the electric signal that amplification circuit module 1 is transmitted, the electric signal is converted to light letter by light emitting diode D3
Number export and to give phototriode VT1, phototriode VT1 converts optical signals to electric signal and amplifies the interruption of output to terminal
Detection module.It is recognised that when detecting electrode P1 senses the electrical leakage voltage higher than preset value, then N-channel insulated gate enhancing
Type FET Q1 is opened, and light emitting diode D3 conductings are luminous, and photoelectrical coupler PC1 starts, so that phototriode VT1 leads
Logical, i.e. photoelectrical coupler PC1 exports the interruption detection module of low level to terminal, the interruption detection module of terminal receive it is low
User is reminded after level.When detecting electrode P1 does not sense the electrical leakage voltage higher than preset value, then N-channel insulation
The enhanced FET Q1 cut-offs of grid, light emitting diode D3 is not turned on, so that phototriode VT1 is in cut-off state, i.e. light
Electric coupler PC1 export high level to terminal interruption detection module, the interruption detection module of terminal after high level is received,
Judge terminal fill do not exist high pressure electric leakage, without reminding user.
Embodiment three：
As shown in figure 5, the embodiment of the present application provides a kind of terminal 100, including：Electric-leakage detection circuit 10 and it is arranged at
Ground connection Copper Foil P1 ' on terminal mainboard.
Electric-leakage detection circuit 10 includes：Detecting electrode P1, amplification circuit module 1 and LED driver circuit module 2.
Detecting electrode P1 is the Copper Foil of default size, is arranged on the mainboard adjacent with ground connection Copper Foil P1 ', detecting electrode P1
It is insulating barrier between ground connection Copper Foil.
Detecting electrode P1 and ground connection Copper Foil P1 ' due to interval predeterminable range and between be insulating barrier, thus detecting electrode P1
Capacitive coupling is produced and ground connection Copper Foil P1 ' between.
The input of amplification circuit module 1 is connected with detecting electrode P1, the input of output end and LED driver circuit module
Connection.
In a kind of implementation method, amplification circuit module 1 includes：The enhanced FET Q1 of N-channel insulated gate and resistance
R1。
The grid of the enhanced FET Q1 of N-channel insulated gate is connected with the detecting electrode, drains and LED drive circuit
Module is connected.Resistance R1 is connected in parallel between the grid of the enhanced FET Q1 of N-channel insulated gate and source electrode, N-channel
The source electrode of the enhanced FET Q1 of insulated gate as the amplification circuit module 1 ground terminal.
In a kind of implementation method, amplification circuit module 1 also includes：
Unidirectional TVS pipe D1.
The source electrode of the anode FET Q1 enhanced with N-channel insulated gate of unidirectional TVS pipe D1 is connected, negative electrode and N-channel
The grid connection of the enhanced FET Q1 of insulated gate.
In a kind of implementation method, amplification circuit module 10 also includes：Two-way TVS pipe D2；
The source electrode and grid of the two ends of two-way TVS pipe D2 FET Q1 enhanced with N-channel insulated gate respectively are connected.
In a kind of implementation method, amplification circuit module 10 also includes：Piezo-resistance RV；
The source electrode of FET Q1 enhanced with N-channel insulated gate and grid connect respectively at the two ends of the piezo-resistance RV
Connect.
In a kind of implementation method, also include：Battery BAT1, LED driver circuit module includes：
LED 1 and resistance R2.
The drain electrode of the negative electrode of LED 1 FET Q1 enhanced with N-channel insulated gate is connected.
After the anode of LED 1 is connected in series resistance R2, the positive pole of the battery BAT1 of terminal, battery BAT1 are connect
Negative pole connect the source electrode of the enhanced FET Q1 of N-channel insulated gate.
In a kind of implementation method, terminal 100 also includes：Interrupt detection module 20；The photoelectrical coupler of electric-leakage detection circuit 10
PC1, in the terminal detection module 20 for outputing signal to terminal.
The input of photoelectrical coupler the PC1 drain electrode of FET Q1 enhanced with N-channel insulated gate and battery respectively
The positive pole connection of BAT1.
The negative signal output head grounding GND of photoelectrical coupler PC1, positive signal output end series resistor R4 is followed by the electricity of terminal
Source VDD.
The positive signal of photoelectrical coupler PC1 exports the interruption detection module 20 of termination end.
In a kind of implementation method, photoelectrical coupler PC1 includes：
The light emitting diode D2 and phototriode VT1 coupled with the light emitting diode D2.
It is connected with the positive pole of battery BAT1 after the cathode series resistance R3 of light emitting diode D2, the negative pole of light emitting diode D2
The drain electrode of FET Q1 enhanced with N-channel insulated gate is connected.
The grounded emitter GND of phototriode VT1, with the power vd D of terminal after collector series connection resistance R4.
The colelctor electrode of phototriode VT1 connects the interruption detection module 20 of terminal.
The structure of the electric-leakage detection circuit 10 in above-mentioned terminal and with the annexation of other modules be referred to implement
The introduction of example one and embodiment two, the present embodiment will not be repeated here.
The preferred embodiment of the application is these are only, the scope of the claims of the application is not thereby limited, it is every to utilize this Shen
Please the equivalent structure made of specification and accompanying drawing content or equivalent flow conversion, or be directly or indirectly used in other related skills
Art field, is similarly included in the scope of patent protection of the application.
Claims (10)
1. a kind of electric-leakage detection circuit, it is characterised in that including：Detecting electrode P1, amplification circuit module and LED drive circuit
Module；
The detecting electrode P1 is the Copper Foil of default size, is arranged on the mainboard adjacent with the ground connection Copper Foil of terminal mainboard, inspection
Survey between electrode P1 and the ground connection Copper Foil is insulating barrier；
The input of the amplification circuit module is connected with the detecting electrode P1, output end and the LED driver circuit module
Input connection.
2. electric-leakage detection circuit as claimed in claim 1, it is characterised in that the amplification circuit module includes：N-channel insulate
Grid enhanced FET Q1 and resistance R1；
The grid of the enhanced FET Q1 of N-channel insulated gate is connected with the detecting electrode P1, and drain electrode is driven with the LED
Dynamic circuit module connection；
The resistance R1 is connected in parallel between the grid of the enhanced FET Q1 of the N-channel insulated gate and source electrode, institute
The source electrode of the enhanced FET Q1 of N-channel insulated gate is stated as the ground terminal of the amplification circuit module.
3. electric-leakage detection circuit as claimed in claim 1, it is characterised in that
The detecting electrode P1 is arranged in radome or is arranged on the internal layer of the mainboard.
4. electric-leakage detection circuit as claimed in claim 2, it is characterised in that the amplification circuit module also includes：Unidirectional TVS
Pipe D1；
The source electrode of the anode FET Q1 enhanced with N-channel insulated gate of the unidirectional TVS pipe D1 is connected, negative electrode and the N
The grid connection of the enhanced FET Q1 of raceway groove insulated gate；Or,
The amplification circuit module also includes：Two-way TVS pipe D2；
The source electrode and grid of the two ends of two-way TVS pipe D2 FET Q1 enhanced with N-channel insulated gate respectively are connected；
Or,
The amplification circuit module also includes：Piezo-resistance RV；
The source electrode and grid of the two ends of piezo-resistance RV FET Q1 enhanced with N-channel insulated gate respectively are connected.
5. the electric-leakage detection circuit as described in claim 2 or 4, it is characterised in that the LED driver circuit module includes：
LED 1 and resistance R2；
The drain electrode of the negative electrode of the LED 1 FET Q1 enhanced with the N-channel insulated gate is connected；
After the anode of the LED 1 is connected in series resistance R2, the positive pole of battery BAT1 is connect, the battery BAT1's
Negative pole connects the source electrode of the enhanced FET Q1 of the N-channel insulated gate.
6. electric-leakage detection circuit as claimed in claim 5, it is characterised in that also include：Photoelectrical coupler PC1, for exporting
In signal to terminal；
The input of the photoelectrical coupler PC1 respectively the drain electrode of FET Q1 enhanced with the N-channel insulated gate and
The positive pole connection of the battery BAT1；
The negative signal output head grounding GND of the photoelectrical coupler PC1, positive signal output end series resistor R4 is followed by the electricity of terminal
Source VDD；
The positive signal of the photoelectrical coupler PC1 exports the interruption detection module of termination end.
7. a kind of terminal, it is characterised in that including：Electric-leakage detection circuit and the ground connection Copper Foil being arranged on the terminal mainboard
P1’；
The electric-leakage detection circuit includes：Detecting electrode P1, amplification circuit module and LED driver circuit module；
The detecting electrode P1 is the Copper Foil of default size, is arranged on the mainboard adjacent with the ground connection Copper Foil P1 ', the inspection
Survey between electrode P1 and the ground connection Copper Foil is insulating barrier；
The input of the amplification circuit module is connected with the detecting electrode, output end and the LED driver circuit module
Input is connected.
8. terminal as claimed in claim 7, it is characterised in that the amplification circuit module includes：N-channel insulated gate is enhanced
FET Q1 and resistance R1；
The grid of the enhanced FET Q1 of N-channel insulated gate is connected with the detecting electrode, and drain electrode drives with the LED
Circuit module is connected；
The resistance R1 is connected in parallel between the grid of the enhanced FET Q1 of the N-channel insulated gate and source electrode, institute
The source electrode of the enhanced FET Q1 of N-channel insulated gate is stated as the ground terminal of the amplification circuit module.
9. terminal as claimed in claim 8, it is characterised in that also include：Battery BAT1, the LED driver circuit module bag
Include：
LED 1 and resistance R2；
The drain electrode of the negative electrode of the LED 1 FET Q1 enhanced with the N-channel insulated gate is connected；
After the anode of the LED 1 is connected in series resistance R2, the positive pole of the battery BAT1 of terminal, the battery are connect
The negative pole of BAT1 connects the source electrode of the enhanced FET Q1 of the N-channel insulated gate.
10. terminal as claimed in claim 9, it is characterised in that also include：Interrupt detection module；The electric-leakage detection circuit
Also include：Photoelectrical coupler PC1, for outputing signal to the terminal detection module in terminal in；
The input of the photoelectrical coupler PC1 respectively the drain electrode of FET Q1 enhanced with the N-channel insulated gate and
The positive pole connection of the battery BAT1；
The negative signal output head grounding GND of the photoelectrical coupler PC1, positive signal output end series resistor R4 is followed by the electricity of terminal
Source VDD；
The positive signal of the photoelectrical coupler PC1 exports the interruption detection module of termination end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621182075.7U CN206223895U (en) | 2016-10-27 | 2016-10-27 | A kind of electric-leakage detection circuit and terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621182075.7U CN206223895U (en) | 2016-10-27 | 2016-10-27 | A kind of electric-leakage detection circuit and terminal |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113282126A (en) * | 2021-07-22 | 2021-08-20 | 南京开关厂有限公司 | Circuit breaker monitoring system and method |
| CN113932671A (en) * | 2021-10-14 | 2022-01-14 | 北京理工大学 | Current trigger type detonation integrated circuit applied to electronic safety system |
-
2016
- 2016-10-27 CN CN201621182075.7U patent/CN206223895U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113282126A (en) * | 2021-07-22 | 2021-08-20 | 南京开关厂有限公司 | Circuit breaker monitoring system and method |
| CN113932671A (en) * | 2021-10-14 | 2022-01-14 | 北京理工大学 | Current trigger type detonation integrated circuit applied to electronic safety system |
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Effective date of registration: 20210827 Address after: 518000 201, No.26, yifenghua Innovation Industrial Park, Xinshi community, Dalang street, Longhua District, Shenzhen City, Guangdong Province Patentee after: Shenzhen waterward Information Co.,Ltd. Address before: 518067 503, 602, block B, garden city digital building, 1079 Nanhai Avenue, Shekou, Nanshan District, Shenzhen, Guangdong Patentee before: Shenzhen Waterward Co.,Ltd. |