CN106788396A - A kind of DC interface circuits and electronic equipment - Google Patents
A kind of DC interface circuits and electronic equipment Download PDFInfo
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- CN106788396A CN106788396A CN201611168675.2A CN201611168675A CN106788396A CN 106788396 A CN106788396 A CN 106788396A CN 201611168675 A CN201611168675 A CN 201611168675A CN 106788396 A CN106788396 A CN 106788396A
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- poles
- interface circuits
- controlling switch
- resistance
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
- H03K19/0175—Coupling arrangements; Interface arrangements
- H03K19/0185—Coupling arrangements; Interface arrangements using field effect transistors only
- H03K19/018507—Interface arrangements
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
- H03K19/0175—Coupling arrangements; Interface arrangements
- H03K19/017509—Interface arrangements
Abstract
A kind of DC interface circuits and electronic equipment are the embodiment of the invention provides, is related to electronic technology field.The circuit includes：Controlling switch, the first resistor and second resistance being serially connected；One end of first resistor is connected on the transmission line of the first pole input of direct current DC interface circuits and the first pole output end；One end of second resistance is connected with the second pole output end of DC interface circuits；The control end of controlling switch is connected between the first resistor of series connection and second resistance, and the first end of controlling switch is connected with one end of the second resistance, and the second end of controlling switch is connected with the second pole input of DC interface circuits；If the control end and first end of controlling switch receive cathode voltage, and controlling switch meets turn-on condition, then control end control first end and the conducting of the second end.The embodiment of the present invention is realized to be protected to the abnormal grafting of DC interface circuits, improves the reliability and stability of module.
Description
Technical field
The present invention relates to electronic technology field, more particularly to a kind of DC interface circuits and electronic equipment.
Background technology
Modular product design and production can keep product with it is higher universal while provide product it is many
Sampleization is configured, therefore, modular product is welcome by increasing producer.
Power supply need to be provided by the disparate modules of product for modules using DC interface circuits.And because module needs to make
DC interface circuits, in the production stage, can produce the exception such as misplug, anti-plug between DC interface circuits and module, cause
The damage of product, modular circuit, influences the yield and production efficiency of product.
Therefore a kind of DC interface circuits are needed badly, it is possible to achieve the abnormal grafting to DC interface circuits is protected, improves mould
The reliability and stability of block.
The content of the invention
Embodiments of the invention provide a kind of DC interface circuits and electronic equipment, are used to realize the exception to DC interface circuits
Grafting is protected, and improves the reliability and stability of module.
To reach above-mentioned purpose, embodiments of the invention are adopted the following technical scheme that：
A kind of DC interface circuits are the embodiment of the invention provides, including：Controlling switch, the first resistor being serially connected and the second electricity
Resistance；Wherein, one end of the first resistor is connected to the first pole input and the first pole output end of direct current DC interface circuits
On transmission line；One end of the second resistance is connected with the second pole output end of the DC interface circuits；The controlling switch
Control end is connected between the first resistor of series connection and second resistance, the first end of the controlling switch and the second resistance
One end connects, and the second end of the controlling switch is connected with the second pole input of the DC interface circuits；If the control
The control end and first end of switch receive cathode voltage, and the controlling switch meets turn-on condition, then the control end control
Make the first end and the conducting of the second end.
Alternatively, the controlling switch includes：N-channel MOS pipe；One end of the first resistor is connected to DC interface circuits
The first pole input and the transmission line of the first pole output end on include：One end of the first resistor is connected to DC interface circuits
Electrode input end and cathode output end transmission line on；The control end of the controlling switch be connected to the first resistor of series connection with
Include between second resistance：The G poles of the N-channel MOS pipe are connected between the first resistor of series connection and second resistance；The control
Make switch first end be connected with one end of the second resistance including：The S poles of the N ditches metal-oxide-semiconductor and the second resistance
One end connects；Second end of the controlling switch be connected with the second pole input of the DC interface circuits including：The N-channel
The D poles of metal-oxide-semiconductor are connected with the negative input of the DC interface circuits；If the control end of the controlling switch and the first termination
Cathode voltage is received, and controlling switch meets turn-on condition, then the control end controls the first end and the second end conducting bag
Include：If the G poles and S poles of the N-channel MOS pipe receive cathode voltage, and the N-channel MOS pipe meets turn-on condition, then
G poles control S poles and the D poles of the N-channel MOS pipe are turned on, and electric current is flowed into by S poles, the outflow of D poles.
Alternatively, also include：Voltage-regulator diode；The voltage-regulator diode is in parallel with the second resistance, and the voltage stabilizing
The positive pole of diode is connected with the cathode output end of the DC interface circuits.
Alternatively, also include：First has delayed electric capacity；Described first to have delayed electric capacity in parallel with second resistance.
Alternatively, the controlling switch includes：P-channel metal-oxide-semiconductor；One end of the first resistor is connected to DC interface circuits
The first pole input and the transmission line of the first pole output end on include：One end of the first resistor is connected to DC interface circuits
Negative input and cathode output end transmission line on；The control end of the controlling switch be connected to the first resistor of series connection with
Include between second resistance：The G poles of the P-channel metal-oxide-semiconductor are connected between the first resistor of series connection and second resistance；The control
Make switch first end be connected with one end of the second resistance including：The S poles of the P-channel metal-oxide-semiconductor and the second resistance
One end connection；Second end of the controlling switch be connected with the second pole input of the DC interface circuits including：The P ditches
The D poles of road metal-oxide-semiconductor are connected with the electrode input end of the DC interface circuits；If the control end and first end of the controlling switch
Cathode voltage is received, and controlling switch meets turn-on condition, then the control end controls the first end and the conducting of the second end
Including：If the G poles and S poles of the P-channel metal-oxide-semiconductor receive cathode voltage, and P-channel metal-oxide-semiconductor meets turn-on condition, then institute
The G poles control S poles for stating P-channel metal-oxide-semiconductor are turned on D poles, and electric current is flowed into by D poles, the outflow of S poles.
Alternatively, also include：Second has delayed electric capacity；Described second to have delayed electric capacity in parallel with the first resistor.
Alternatively, the first resistor is equal with the resistance of the second resistance.
Further, a kind of electronic equipment is the embodiment of the invention provides, including：DC interfaces electricity described in above-described embodiment
Road and voltage module；The positive pole of the voltage module is connected with the electrode input end of the DC interface circuits, the voltage module
Negative pole be connected with the negative input of the DC interface circuits.
A kind of DC interface circuits and electronic equipment are the embodiment of the invention provides, including：Controlling switch, for being serially connected
One resistance and second resistance, wherein, the first pole input that one end of first resistor is connected to DC interface circuits is extremely defeated with first
Go out on the transmission line at end；One end of second resistance is connected with the second pole output end of DC interface circuits；The control end of controlling switch
It is connected between the first resistor of series connection and second resistance, the first end of controlling switch is connected with one end of second resistance, controls
Second end of switch is connected with the second pole input of DC interface circuits；Received just in the control end and first end of controlling switch
When voltage difference between pole tension, and the control end and first end of controlling switch meets turn-on condition, control end control first end and
Second end turns on.So, DC interface circuits can access voltage module just connect when, be controlling switch control end and
First end provides cathode voltage, when now the voltage difference between the control end and first end of holding switch meets pre-conditioned, then
Control end turns on first end and the second end so that DC interface circuits can be transmitted to other modules, and in electricity the voltage of access
During die block reversal connection to DC interface circuits, controlling switch cannot control end cannot turn on first end and the second end so that
The voltage that voltage module is provided cannot be transmitted to other modules by DC interface circuits, reduce DC interface circuits and other modules
Because voltage module reversal connection and caused by damage possibility, realize and the abnormal grafting of DC interface circuits protected, improve module
Reliability and stability purpose.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be in embodiment or description of the prior art
The required accompanying drawing for using is briefly described, it should be apparent that, drawings in the following description are only some realities of the invention
Example is applied, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is a kind of structural representation of DC interface circuits provided in an embodiment of the present invention；
Fig. 2 is the structural representation of another DC interface circuits provided in an embodiment of the present invention；
Fig. 3 is the structural representation of another DC interface circuits provided in an embodiment of the present invention；
Fig. 4 is the structural representation of a kind of electronic equipment provided in an embodiment of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
As shown in figure 1, a kind of DC interface circuits are the embodiment of the invention provides, including：Controlling switch 10, is serially connected
First resistor 11 and second resistance 12.
Wherein, one end of first resistor 11 is connected to DC（Direct Current, direct current）First pole input of interface
On the transmission line of the first pole output end；One end of second resistance 12 is connected with the second pole output end of DC interface circuits.Control
The control end of switch 10 is connected between the first resistor 11 of series connection and second resistance 12, the first end of controlling switch 10 and second
One end connection of resistance 12, the second end of controlling switch 10 is connected with the second pole input of DC interface circuits.
If the control end and first end of controlling switch 10 receive cathode voltage, and the control end of controlling switch 10 and
Voltage difference between one end meets turn-on condition, then control end control first end and the conducting of the second end.
Specifically, the control end of controlling switch 10 is connected between first resistor 11 and second resistance 12, and controlling switch
10 first end is connected to one end of second resistance 12, and one end of second resistance 12 is connected to the second pole output end, as controls
The first end of switch 10 is connected in the second pole output end.Secondth end of controlling switch 10 is connected to the second of DC interface circuits
Pole input.It follows that the first end of controlling switch 10 and the second end be arranged on the second pole input of DC interface circuits with
On the connecting line of the second pole output end.So, the first pole input in DC interface circuits and the second pole input connection
Voltage module when just connecing, as, the electrode input end of DC interface circuits is connected with the positive pole of voltage module, DC interface circuits
When negative input is connected with the negative pole of voltage module, cathode voltage, and controlling switch 10 can be provided for controlling switch 10
Control end and first extremely can receive cathode voltage signal, expire with the voltage difference of the first interpolar in the control end of controlling switch 10
During sufficient turn-on condition, control end can turn on the first pole and the second pole, and then DC interface circuits can be caused voltage module
The voltage signal of offer is transmitted to other modules, for other modules provide operating voltage.
And in the first pole input of voltage module reversal connection to DC interface circuits and the second pole input, as, as,
The electrode input end of DC interface circuits is connected with the negative pole of voltage module, negative input and the voltage module of DC interface circuits
Positive pole is connected, and now voltage module cannot provide cathode voltage, the control end control of controlling switch 10 for controlling switch 10
First pole and the second pole are not turned on, then DC interface circuits cannot be transmitted to other modules the voltage signal of voltage module, so that
When can prevent voltage module reversal connection, for other modules provide reversal connection voltage, damage is made to other modules, improve module
Reliability and stability.
Further, above-mentioned controlling switch can be MOS（Metal oxide semiconductor, metal-insulator-
Semiconductor）Pipe, and metal-oxide-semiconductor can be divided into N and link up MOS and P communication metal-oxide-semiconductors, the type according to above-mentioned metal-oxide-semiconductor is different, DC interfaces
The first pole in circuit, the polarity of the second pole is different.It is specific as follows：
Controlling switch 10 includes：N-channel MOS pipe.Turn-on condition includes：The G pole tensions of N-channel MOS pipe are more than S pole tensions, and G
Bias voltage is preset more than first with the voltage difference of S interpolars in pole.
Now, one end of first resistor 11 is connected to the first pole input of DC interface circuits and the biography of the first pole output end
Include on defeated line：One end of first resistor 11 is connected to the electrode input end 13 of DC interface circuits and the transmission of cathode output end 14
On line 15, as shown in Figure 2.
The control end of controlling switch 10 is connected between the first resistor 11 of series connection and second resistance 12 to be included：N-channel MOS
The G poles of pipe are connected between the first resistor 11 of series connection and second resistance 12.
The first end of controlling switch 10 be connected with one end of second resistance 12 including：The S poles of N ditch metal-oxide-semiconductors and second resistance
12 one end connection.
Second end of controlling switch 10 be connected with the second pole input of DC interface circuits including：The D poles of N-channel MOS pipe
It is connected with the negative input 17 of DC interface circuits.
If the control end and first end of controlling switch 10 receive cathode voltage, and the control end of controlling switch 10 and
Voltage between one end meets turn-on condition, then control end control first end and the conducting of the second end includes：
If the G poles and S poles of N-channel MOS pipe receive cathode voltage, and N-channel MOS pipe N-channel MOS pipe meets conducting bar
Part, then the G poles control S poles of N-channel MOS pipe are turned on D poles, and electric current is flowed into by S poles, the outflow of D poles.
That is, when controlling switch 10 is N-channel MOS pipe, because the turn-on condition of N-channel MOS pipe is N-channel
The G pole tensions of metal-oxide-semiconductor are more than S pole tensions, it is necessary to the G pole tensions of N-channel MOS pipe therefore, it can first electric more than S pole tensions
One end of resistance 11 is connected on the connecting line 15 of the electrode input end 13 of DC interface circuits and cathode output end 14, N-channel MOS pipe
G poles be connected between first resistor 11 and second resistance 12, the S poles of N-channel MOS pipe are connected to being connected to for second resistance 12
One end of the cathode output end 16 of DC interface circuits.So, the electrode input end 13 and negative pole in DC interface circuits are input into
When end 17 just connects with voltage module, as, the electrode input end 13 of DC interface circuits is connected with the positive pole of voltage module, DC interfaces
The negative input 17 of circuit is connected with the negative pole of voltage module, and the electric current that voltage module is provided is defeated from the positive pole of DC interface circuits
Enter end 13 to flow into, flow to when at first resistor 11, be divided into two branch roads, one flows into first resistor 11, and another passes through positive pole
Output end 14 flow to other modules.The electric current of first resistor 11 is flowed into, the G poles and that N links up metal-oxide-semiconductor are flow to by first resistor
Two resistance 12, and the S poles that N links up metal-oxide-semiconductor are flow to by second resistance 12.Now, N links up the G poles of metal-oxide-semiconductor and S extremely can be with
Electric current is received, cathode voltage is as received, the G pole tensions that the turn-on condition that N links up metal-oxide-semiconductor is are more than S pole tensions.Now
The G pole tensions that N in DC interface circuits links up metal-oxide-semiconductor are more than S pole tensions, therefore meet turn-on condition, therefore, N-channel MOS pipe
G can extremely turn on D poles and S poles, now, the cathode output end 16 of DC interfaces and the connecting line of negative input 17 are one and lead to
Road.Because electric current must circulate in a loop circuit, voltage could be provided for each device.Therefore, DC interface circuits connect
The circuit of receipts must again flow back into voltage module.Therefore, G poles, the electric current that S poles receive flow to negative input 17 by D poles,
And voltage module is flow back into by negative input 17.And the electric current of cathode output end 14 is flowed into, by cathode output end 14
Other modules are flowed into, electricity is streamed to other modules the cathode output end 16 of DC interface circuits, and by cathode output end
16 flow to the S poles that N links up metal-oxide-semiconductor, and D poles are flowed into by S poles, and flow to negative input 17 by D poles, are input into by negative pole
End 17 flows back into voltage module.
And in voltage module reversal connection, as, the electrode input end 13 of DC interface circuits is connected with the negative pole of voltage module,
The negative input 17 of DC interface circuits is connected with the positive pole of voltage module, and the electric current of voltage module flows into negative input
17, the D poles of N-channel MOS pipe are flow to by negative input 17, because the G poles of N communication metal-oxide-semiconductors and S do not receive positive pole extremely
Voltage, as, does not flow into the extremely uncontrollable S poles of G and D the poles conducting that N links up metal-oxide-semiconductor by electric current, therefore, electric current flow to N-channel
The D of metal-oxide-semiconductor extremely after, it is impossible to further flow to the other positions of DC interface circuits, therefore, the voltage module of reversal connection cannot be by DC
Interface circuit not other module for power supply.So, in voltage module reversal connection, it is impossible to for other modules provide reversal connection voltage,
Prevent from making other modules damage, improve the reliability and stability of module.
Further, above-mentioned DC interface circuits, with reference to shown in Fig. 2, also include：Voltage-regulator diode 18.
Voltage-regulator diode 18 is in parallel with second resistance 12, and the positive pole of voltage-regulator diode 18 is defeated with the negative pole of DC interface circuits
Go out end 16 to connect.
Specifically, because N-channel MOS pipe is in voltage-controlled type, too high voltage pulse can cause G poles to puncture, voltage-regulator diode
18 is the offer overvoltage protection of N-channel MOS pipe G poles.
Further, above-mentioned DC interface circuits, with reference to shown in Fig. 2, also include：Also include：First has delayed electric capacity 19.First
Electric capacity 19 is delayed in parallel with second resistance 12.
Specifically, first has delayed electric capacity 19 in circuit turn-on momentary charge, the voltage that ensure that G poles is progressively to set up
Come, prevent N from linking up metal-oxide-semiconductor in the moment for receiving electric current, too high voltage pulse causes G poles to puncture, and first has delayed electric capacity 19
It is the offer overvoltage protection of N-channel MOS pipe G poles.
Or, as shown in figure 3, controlling switch 10 includes：P-channel metal-oxide-semiconductor, now turn-on condition is the G of P-channel metal-oxide-semiconductor
Pole tension is less than S pole tensions.
Now, one end of first resistor 11 is connected to the first pole input of DC interface circuits and the biography of the first pole output end
Include on defeated line：One end of first resistor 11 is connected to the negative input 17 of DC interface circuits and the transmission of cathode output end 16
On line.
The control end of controlling switch 10 is connected between the first resistor 11 of series connection and second resistance 12 to be included：P-channel MOS
The G poles of pipe are connected between the first resistor 11 of series connection and second resistance 12.
The first end of controlling switch 10 be connected with one end of second resistance 12 including：The S poles of P-channel metal-oxide-semiconductor and the second electricity
One end connection of resistance 12.
Second end of controlling switch 10 be connected with the second pole input of DC interface circuits including：The D poles of P-channel metal-oxide-semiconductor
It is connected with the electrode input end 13 of DC interface circuits.
If the control end and first end of controlling switch 10 receive cathode voltage, and controlling switch 10 meets conducting bar
Part, then control end control first end and the conducting of the second end includes：
If the G poles and S poles of P-channel metal-oxide-semiconductor receive cathode voltage, and P-channel metal-oxide-semiconductor meets turn-on condition, then P-channel
G poles control S poles and the D poles of metal-oxide-semiconductor are turned on, and electric current is flowed into by D poles, the outflow of S poles.
That is, when controlling switch is P-channel metal-oxide-semiconductor, because the turn-on condition of P-channel metal-oxide-semiconductor is P-channel MOS
The G pole tensions of pipe be less than S pole tensions, it is necessary to P-channel metal-oxide-semiconductor G pole tensions be less than S pole tensions, therefore, the D of P-channel metal-oxide-semiconductor
Pole is connected with electrode input end 13, and the S poles of P-channel metal-oxide-semiconductor are connected with one end of second resistance 12, and the G poles of P-channel metal-oxide-semiconductor connect
It is connected between second resistance 12 and first resistor 11.So, the electrode input end 13 and negative pole in DC interface circuits are input into
When end 17 just connects with voltage module, as, the electrode input end 13 of DC interface circuits is connected with the positive pole of voltage module, DC interfaces
The negative input 17 of circuit is connected with the negative pole of voltage module, and the electric current that voltage module is provided is defeated from the positive pole of DC interface circuits
Enter end 13 to flow into, flow to the D poles of P-channel metal-oxide-semiconductor, because there is individual diode D poles with S interpolars in P-channel metal-oxide-semiconductor so that electricity
Stream can be flowed into from D poles, from the outflow of S poles, prevent electric current from being flowed into from S poles, the outflow of D poles, therefore the electric current that voltage module is provided can
Flowed into by D poles in P-channel metal-oxide-semiconductor, and from the outflow of S poles, flow to second resistance 12, electric current is divided into two branch roads, a stream
Enter second resistance 12, another flow to other modules by cathode output end 14.The electric current of second resistance 12 is flowed into, by second
12 points of resistance is two branch roads, the G poles for flowing to P-channel metal-oxide-semiconductor, and another flow in first resistor 11.Electric current flow to P ditches
The G of road metal-oxide-semiconductor extremely after, because electric current is after S poles are flowed out, G poles are flow to by second resistance, thus P-channel metal-oxide-semiconductor G poles
Voltage less than S poles voltage, therefore P-channel metal-oxide-semiconductor G poles control S poles and D poles conducting so that the D of P-channel metal-oxide-semiconductor is extremely electric
Pressure is identical with S pole tensions.The electric current of first resistor 11 is flow to by after first resistor 11, flowing to negative input 17 and negative pole being defeated
Go out on the connecting line between end 16, electric current flows upwardly to negative input 17 in this connecting line, and flows back to electricity by negative input 17
Die block.And the electric current of other modules is flow to, it is flow between negative input 17 and cathode output end 16 by cathode output end 16
Connecting line on, and flow upwardly to negative input 17 in this connecting line, and voltage module is flowed back to by negative input 17.
And in voltage module reversal connection, as, the electrode input end 13 of DC interface circuits is connected with the negative pole of voltage module,
The negative input 17 of DC interface circuits is connected with the positive pole of voltage module, and the electric current of voltage module flows into negative input
17, first resistor 11 and cathode output end 16 are flow to by negative input 17.The electric current for flowing to first resistor 11 passes through first
After resistance 11, it is divided into two branch roads, the G poles for flowing to P-channel metal-oxide-semiconductor, another flow to second resistance 12, by second
Resistance 12 flow to the S poles of P-channel metal-oxide-semiconductor, due to the voltage of the voltage more than S poles of G poles, therefore, the conducting bar of P-channel metal-oxide-semiconductor
Part cannot meet, and now the G poles of P-channel metal-oxide-semiconductor cannot turn on S poles and D poles.Therefore, electric current cannot flow back into voltage module,
Therefore, the voltage module of reversal connection cannot be by DC interface circuits not other module for power supply.So, in voltage module reversal connection
When, it is impossible to for other modules provide reversal connection voltage, prevent from making other modules damage, improve the reliability and stabilization of module
Property.
Further, above-mentioned DC interface circuits, with reference to shown in Fig. 3, also include：Second has delayed electric capacity 20.Wherein, second delays
Play electric capacity 20 in parallel with first resistor 11.
Specifically, second has delayed electric capacity 20 in circuit turn-on momentary charge, the voltage that ensure that G poles is progressively to set up
Come, prevent P from linking up metal-oxide-semiconductor in the moment for receiving electric current, too high voltage pulse causes G poles to puncture, and second has delayed electric capacity 20
It is the offer overvoltage protection of P-channel metal-oxide-semiconductor G poles.
Further, the resistance of above-mentioned first resistor 11 and second resistance 12 is equal.For example, 10 kilo-ohms can be.When
So, other resistances, the invention is not limited in this regard be can also be.
As shown in figure 4, a kind of electronic equipment is the embodiment of the invention provides, including：DC interfaces described in above-described embodiment
Circuit 20 and voltage module 21.
Wherein, the positive pole of voltage module 21 is connected with the electrode input end of DC interface circuits 20, the negative pole of voltage module 21
Negative input with DC interface circuits 20 is connected.
So, DC interface circuits can be the control end and the of controlling switch when the voltage module for accessing just connects
One end provides cathode voltage, when now the voltage difference between the control end and first end of holding switch meets pre-conditioned, then controls
End processed turns on first end and the second end so that DC interface circuits can be transmitted to other modules, and in voltage the voltage of access
During module reversal connection to DC interface circuits, controlling switch cannot control end cannot turn on first end and the second end so that electric
Die block provide voltage cannot be transmitted to other modules by DC interface circuits, reduce DC interface circuits and other modules because
Voltage module reversal connection and cause the possibility damaged, realize and the abnormal grafting of DC interface circuits protected, improve module
The purpose of reliability and stability.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It still may be used
Modified with to the technical scheme described in foregoing embodiments, or equivalent is carried out to which part technical characteristic；
And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (8)
1. a kind of DC interface circuits, it is characterised in that including：
Controlling switch, the first resistor and second resistance being serially connected；Wherein,
One end of the first resistor is connected to the transmission of the first pole input and the first pole output end of direct current DC interface circuits
On line；One end of the second resistance is connected with the second pole output end of the DC interface circuits；
The control end of the controlling switch is connected between the first resistor of series connection and second resistance, and the first of the controlling switch
End is connected with one end of the second resistance, the second pole input of the second end of the controlling switch and the DC interface circuits
Connection；
If the control end and first end of the controlling switch receive cathode voltage, and the controlling switch meets conducting bar
Part, then the control end control first end and the conducting of the second end.
2. circuit according to claim 1, its feature exists, and the controlling switch includes：N-channel MOS pipe；
One end of the first resistor is connected on the transmission line of the first pole input of DC interface circuits and the first pole output end
Including：
One end of the first resistor is connected on the transmission line of the electrode input end of DC interface circuits and cathode output end；
The control end of the controlling switch is connected between the first resistor of series connection and second resistance to be included：
The G poles of the N-channel MOS pipe are connected between the first resistor of series connection and second resistance；
The first end of the controlling switch be connected with one end of the second resistance including：
The S poles of the N ditches metal-oxide-semiconductor are connected with one end of the second resistance；
Second end of the controlling switch be connected with the second pole input of the DC interface circuits including：
The D poles of the N-channel MOS pipe are connected with the negative input of the DC interface circuits；
If the control end and first end of the controlling switch receive cathode voltage, and controlling switch meets turn-on condition, then
The control end controls the first end and the second end to turn on to be included：
If the G poles and S poles of the N-channel MOS pipe receive cathode voltage, and the N-channel MOS pipe meets turn-on condition,
Then the G poles control S poles of the N-channel MOS pipe are turned on D poles, and electric current is flowed into by S poles, the outflow of D poles.
3. circuit according to claim 2, it is characterised in that also include：Voltage-regulator diode；
The voltage-regulator diode is in parallel with the second resistance, and the positive pole of the voltage-regulator diode and the DC interface circuits
Cathode output end is connected.
4. circuit according to claim 2, it is characterised in that also include：First has delayed electric capacity；
Described first to have delayed electric capacity in parallel with second resistance.
5. circuit according to claim 1, it is characterised in that the controlling switch includes：P-channel metal-oxide-semiconductor；
One end of the first resistor is connected on the transmission line of the first pole input of DC interface circuits and the first pole output end
Including：
One end of the first resistor is connected on the transmission line of the negative input of DC interface circuits and cathode output end；
The control end of the controlling switch is connected between the first resistor of series connection and second resistance to be included：
The G poles of the P-channel metal-oxide-semiconductor are connected between the first resistor of series connection and second resistance；
The first end of the controlling switch be connected with one end of the second resistance including：
The S poles of the P-channel metal-oxide-semiconductor are connected with one end of the second resistance；
Second end of the controlling switch be connected with the second pole input of the DC interface circuits including：
The D poles of the P-channel metal-oxide-semiconductor are connected with the electrode input end of the DC interface circuits；
If the control end and first end of the controlling switch receive cathode voltage, and controlling switch meets turn-on condition, then
The control end controls the first end and the second end to turn on to be included：
If the G poles and S poles of the P-channel metal-oxide-semiconductor receive cathode voltage, and P-channel metal-oxide-semiconductor meets turn-on condition, then institute
The G poles control S poles for stating P-channel metal-oxide-semiconductor are turned on D poles, and electric current is flowed into by D poles, the outflow of S poles.
6. circuit according to claim 6, it is characterised in that also include：Second has delayed electric capacity；
Described second to have delayed electric capacity in parallel with the first resistor.
7. the circuit according to claim any one of 1-6, it is characterised in that the first resistor and the second resistance
Resistance is equal.
8. a kind of electronic equipment, it is characterised in that including：DC interface circuits and voltage-mode described in claim any one of 1-7
Block；
The positive pole of the voltage module is connected with the electrode input end of the DC interface circuits, the negative pole of the voltage module and institute
State the negative input connection of DC interface circuits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611168675.2A CN106788396A (en) | 2016-12-16 | 2016-12-16 | A kind of DC interface circuits and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611168675.2A CN106788396A (en) | 2016-12-16 | 2016-12-16 | A kind of DC interface circuits and electronic equipment |
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| CN106788396A true CN106788396A (en) | 2017-05-31 |
Family
ID=58893212
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611168675.2A Pending CN106788396A (en) | 2016-12-16 | 2016-12-16 | A kind of DC interface circuits and electronic equipment |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203312778U (en) * | 2013-06-24 | 2013-11-27 | 王建设 | Chip power supply protection circuit |
| CN203326666U (en) * | 2013-05-29 | 2013-12-04 | 向智勇 | Charging circuit capable of preventing reversal connection of charging power supply |
-
2016
- 2016-12-16 CN CN201611168675.2A patent/CN106788396A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203326666U (en) * | 2013-05-29 | 2013-12-04 | 向智勇 | Charging circuit capable of preventing reversal connection of charging power supply |
| CN104218539A (en) * | 2013-05-29 | 2014-12-17 | 惠州市吉瑞科技有限公司 | Charging circuit and charging method capable of preventing reverse connection of rechargeable power supply |
| CN203312778U (en) * | 2013-06-24 | 2013-11-27 | 王建设 | Chip power supply protection circuit |
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