CN209296821U - Detection device, system and the electronic equipment of external antenna interface - Google Patents
Detection device, system and the electronic equipment of external antenna interface Download PDFInfo
- Publication number
- CN209296821U CN209296821U CN201821935853.4U CN201821935853U CN209296821U CN 209296821 U CN209296821 U CN 209296821U CN 201821935853 U CN201821935853 U CN 201821935853U CN 209296821 U CN209296821 U CN 209296821U
- Authority
- CN
- China
- Prior art keywords
- divider resistance
- resistance
- external antenna
- voltage
- communication device
- 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.)
- Active
Links
Landscapes
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- Transceivers (AREA)
Abstract
This disclosure relates to a kind of detection device of external antenna interface, system and electronic equipment, the detection device is connect with external antenna and communication device respectively, it include: coupled capacitor, filter inductance, first divider resistance, second divider resistance, third divider resistance and the 4th divider resistance, the first end of first divider resistance is connect with the first end of the 4th divider resistance, the second end of first divider resistance and the first end of filter inductance connect, the second end of filter inductance is connect with external antenna, the second end of 4th divider resistance and the end GPIO of communication device connect, the first end of second divider resistance is connect with the first end of the 4th divider resistance, the second end of second divider resistance is connect with the first end of third divider resistance, the second end of third divider resistance is grounded, the first end of third divider resistance and the end ADC of communication device connect It connects, the first end of coupled capacitor is connect with external antenna, and the second end of coupled capacitor and the end RF of communication device connect.
Description
Technical field
This disclosure relates to antenna technical field, and in particular, to a kind of detection device, system and the electricity of external antenna interface
Sub- equipment.
Background technique
With the continuous development of the communication technology and information technology, the application in the scenes such as life, work is wirelessly communicated
It is more more and more universal.As the important composition component in wireless communication technique, communication device and external is both provided in many equipment
Antenna, to realize and extraneous information exchange.However the research and development in equipment, production, installation, use etc. in each intermediate links,
External antenna during movement or debugging it is possible that fall off or short circuit the problems such as, lead to wireless communication interruptions, can not
Carry out data transmission.Therefore it in order to keep good connection status between communication device and external antenna, needs to fill by detection
It sets to detect the state of external antenna.
Utility model content
Purpose of this disclosure is to provide detection device, system and the electronic equipments of a kind of external antenna interface, can be effective
Ground detects the abnormality of external antenna, convenient for safeguarding.
To achieve the goals above, according to the first aspect of the embodiments of the present disclosure, a kind of inspection of external antenna interface is provided
Device is surveyed, the detection device is connect with external antenna and communication device respectively, and the detection device includes: coupled capacitor, filter
Wave inductance, the first divider resistance, the second divider resistance, third divider resistance and the 4th divider resistance；
The first end of first divider resistance is connect with the first end of the 4th divider resistance, the first partial pressure electricity
The second end of resistance is connect with the first end of the filter inductance, and the second end of the filter inductance is connect with the external antenna,
The second end of 4th divider resistance is connect with the end general input/output port GPIO of the communication device, second partial pressure
The first end of resistance is connect with the first end of the 4th divider resistance, the second end and the third of second divider resistance
The first end of divider resistance connects, the second end ground connection of the third divider resistance, the first end of the third divider resistance with
The end ADC of the communication device connects, and the first end of the coupled capacitor is connect with the external antenna, the coupled capacitor
Second end is connect with the end RF of the communication device.
Optionally, the detection device further include: electrostatic protection diode；
The first end of the electrostatic protection diode is connect with the first end of the coupled capacitor, two pole of electrostatic protection
The second end of pipe is grounded；
The electrostatic protection diode is used for release electrostatic electric current, to protect the end RF.
Optionally, the detection device further include: first diode and the second diode；
The anode of the first diode is connect with the first end of the 4th divider resistance, and the first diode is born
The anode of pole and second diode connect, and the cathode of second diode is grounded, the first diode and described the
Two Diode series form clamp circuit；
When the external antenna is shorted to positive pole, first divider resistance is for limiting electric current, the filtering
For inductance for filtering, the clamp circuit is used to protect the end GPIO of the communication device.
According to the second aspect of an embodiment of the present disclosure, a kind of detection system of external antenna interface, the detection system are provided
System includes: the detection device for the external antenna interface that external antenna, communication device and disclosure first aspect provide；
The external antenna includes radiator and pull down resistor, and the first end of the radiator is vacant, the radiator
Second end is connect with the first end of the pull down resistor, the second end ground connection of the pull down resistor, and the first of the pull down resistor
End is connect with the detection device.
Optionally, it is described logical for being powered on for the detection device when end GPIO of the communication device exports high level
When the end GPIO of T unit exports low level, for closing the detection device；
The communication device, the electricity on the third divider resistance for being obtained according to the end ADC of the communication device
Pressure value determines the state of the external antenna.
Optionally, the communication device is used for:
When the voltage value on the third divider resistance is preset first voltage, determine that the external antenna falls off；
When the voltage value on the third divider resistance is preset second voltage, determine that the external antenna is shorted to
Ground；
When the voltage value on the third divider resistance is preset tertiary voltage, determine that the external antenna is shorted to
Positive pole；
When the voltage value on the third divider resistance is preset four voltage, the external antenna connection is being determined just
Often.
Optionally, the first voltage be the voltage value exported according to the end GPIO of the communication device, it is second point described
The resistance value of the resistance value of piezoresistance, the resistance value of the third divider resistance and the 4th divider resistance is determined using the first formula
Voltage value；
The second voltage is the voltage value exported according to the end GPIO of the communication device, first divider resistance
Resistance value, the resistance value of second divider resistance, the resistance value of the resistance value of the third divider resistance and the 4th divider resistance, benefit
The voltage value determined with the second formula；
The tertiary voltage is according to the clamp voltage of the clamp circuit, the resistance value of second divider resistance and described
The resistance value of third divider resistance, the voltage value determined using third formula；
4th voltage is the voltage value exported according to the end GPIO of the communication device, first divider resistance
Resistance value, the resistance value of second divider resistance, the resistance value of the third divider resistance, the resistance value of the 4th divider resistance and institute
The resistance value for stating pull down resistor, the voltage value determined using the 4th formula.
Optionally, first formula includes:
Wherein, V1Indicate the first voltage, VIOIndicate the voltage value of the end the GPIO output of the communication device, R2It indicates
The resistance value of second divider resistance, R3Indicate the resistance value of the third divider resistance, R4Indicate the resistance of the 4th divider resistance
Value；
Second formula includes:
Wherein, V2Indicate the second voltage, R1The resistance value of the first divider resistance is stated in expression；
The third formula includes:
Wherein, V3Indicate the tertiary voltage, VDIndicate the clamp voltage of the clamp circuit；
4th formula includes:
Wherein, V4Indicate the 4th voltage, RmAfter indicating that second divider resistance is connected with the third divider resistance
Resistance and first divider resistance connect with the pull down resistor after resistor coupled in parallel resistance value, R5Indicate the drop-down
The resistance value of resistance.
According to the third aspect of an embodiment of the present disclosure, a kind of electronic equipment is provided, the electronic equipment includes: external day
The detection device for the external antenna interface that line, communication device and disclosure first aspect provide, the electronic equipment include:
Processor；
Memory for storage processor executable instruction；
Wherein, the processor is configured to: according to the end ADC of the communication device obtain the third divider resistance
On voltage value, determine the state of the external antenna, the state of the external antenna includes: to fall off, be shorted to ground, be shorted to
Positive pole or connection are normal.
Through the above technical solutions, detection device provided by the disclosure includes: coupled capacitor, filter inductance, first point
Piezoresistance, the second divider resistance, third divider resistance and the 4th divider resistance.Wherein, the first end of the first divider resistance and the
The first end of four divider resistances connects, and the second end of the first divider resistance and the first end of filter inductance connect, filter inductance
Second end is connect with external antenna, and the second end of the 4th divider resistance and the end GPIO of communication device connect, the second divider resistance
First end connect with the first end of the 4th divider resistance, the first end of the second end of the second divider resistance and third divider resistance
Connection, the second end ground connection of third divider resistance, the first end of third divider resistance and the end ADC of communication device connect, coupling
The first end of capacitor is connect with external antenna, and the second end of coupled capacitor and the end RF of communication device connect.Communication device
The end GPIO is used to power to detection device, and the end ADC is used to obtain the voltage value on third divider resistance, to be divided according to third
The voltage value of resistance determines the state of external antenna.It is external to realize by the end GPIO and the end ADC that are carried using communication device
The detection of antenna condition, structure is simple, and manufacturing cost is low, and the abnormality of external antenna can be effectively detected out, convenient for dimension
Shield.
Other feature and advantage of the disclosure will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
Attached drawing is and to constitute part of specification for providing further understanding of the disclosure, with following tool
Body embodiment is used to explain the disclosure together, but does not constitute the limitation to the disclosure.In the accompanying drawings:
Fig. 1 is the circuit diagram for the detection device for implementing a kind of external antenna interface exemplified according to one；
Fig. 2 is the circuit diagram for the detection device for implementing another external antenna interface exemplified according to one；
Fig. 3 is the circuit diagram for the detection device for implementing another external antenna interface exemplified according to one；
Fig. 4 is the block diagram for the detection system for implementing a kind of external antenna interface exemplified according to one；
Fig. 5 is the block diagram of a kind of electronic equipment shown according to an exemplary embodiment.
Description of symbols
101 external antenna 102 of detection device
103 first divider resistance 11 of communication device
Second divider resistance, 12 third divider resistance 13
4th divider resistance, 14 filter inductance 16
17 electrostatic protection diode 18 of coupled capacitor
The second diode of first diode 19a 19b
10 pull down resistor 15 of radiator
300 processor 301 of electronic equipment
302 multimedia component 303 of memory
Input/output interface 304
Specific embodiment
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all implementations consistent with this disclosure.On the contrary, they be only with it is such as appended
The example of the consistent device and method of some aspects be described in detail in claims, the disclosure.
Fig. 1 is the circuit diagram for the detection device for implementing a kind of external antenna interface exemplified according to one, as shown in Figure 1,
The detection device 101 is connect with external antenna 102 and communication device 103 respectively, and detection device 101 includes: coupled capacitor 17, filter
Wave inductance 16, the first divider resistance 11, the second divider resistance 12, third divider resistance 13 and the 4th divider resistance 14.
The first end of first divider resistance 11 is connect with the first end of the 4th divider resistance 14, and the of the first divider resistance 11
Two ends are connect with the first end of filter inductance 16, and the second end of filter inductance 16 is connect with external antenna 102, the 4th divider resistance
14 second end and the GPIO (English: General Purpose Input Output, Chinese: general defeated of communication device 103
Enter/delivery outlet) connection is held, the first end of the second divider resistance 12 is connect with the first end of the 4th divider resistance 14, the second partial pressure
The second end of resistance 12 is connect with the first end of third divider resistance 13, the second end ground connection of third divider resistance 13, third point
The first end of piezoresistance 13 and the ADC (English: Analog-to-Digital Converter, Chinese: simulation of communication device 103
Digital quantizer) end connection, the first end of coupled capacitor 17 connect with external antenna 102, the second end of coupled capacitor 17 with lead to
RF (English: Radio Frequency, Chinese: radio frequency) end connection of T unit 103.
The end GPIO of communication device 103 is for giving detection device 101 to power, and the end ADC of communication device 103 is for obtaining the
Voltage value on three divider resistances 13, to determine the state of external antenna 102 according to the voltage value of third divider resistance 13.
For example, detection device 101 is arranged between external antenna 102 and communication device 103.Wherein, external antenna
102 may include radiator 10 and pull down resistor 15, and the first end of radiator 10 is vacant, the second end and drop-down electricity of radiator 10
The first end connection of resistance 15, the second end ground connection of pull down resistor 15.Communication device 103 is penetrated including the end GPIO, the end ADC, the end RF
Frequency end, the end RF can also be wrapped for connecting radio-frequency antenna (English: Radio Frequency Antenna, abbreviation: RF ANT)
Include other pins such as power supply, clock, piece choosing, crystal oscillator.Detection device 101 passes through the second end and external antenna of filter inductance 16
102 (i.e. the first ends of pull down resistor 15) connection, second end, third partial pressure of the detection device 101 by the 4th divider resistance 14
The first end of resistance 13, the second end of coupled capacitor 17 and communication device 103 (respectively correspond communication device 103 the end GPIO,
The end ADC, the end RF) connection.
In detection device 101, the first divider resistance 11 is connected with filter inductance 16, the second divider resistance 12 and third partial pressure
Resistance 13 is connected, the second divider resistance 12 connect with third divider resistance 13 after resistance and the first divider resistance 11 and pull down
Resistor coupled in parallel after the series connection of resistance 15, then connect with the 4th divider resistance 14.First divider resistance 11, the second divider resistance 12,
Third divider resistance 13 and the 4th divider resistance 14 form different potential-divider networks, to detect the state of external antenna 102, in order to
The state of external antenna 102, the first divider resistance 11, the second divider resistance 12,13 and of third divider resistance can accurately be detected
It is 1% resistance that 4th divider resistance 14, which can select precision,.For filter inductance 16 for filtering, coupled capacitor 17 is straight for obstructing
It flows, and the radiofrequency signal of external antenna 102 is coupled to the end RF of communication device 103.
Detection device 101 is powered using the end GPIO carried on communication device 103, is saved for electric resources, structure letter
It is single, reduce manufacturing cost.The end GPIO can be controlled by communication device 103, when the state for needing to detect external antenna 102
When, the control end GPIO output high level (such as :+1.8V), to power to detection device 101, when detection finishes, need to close inspection
Survey device 101, the control end GPIO output low level (such as: 0V), opening or closing for detection device 101 can be flexibly controlled,
The energy that detection device 101 is constantly in working condition consumption is avoided, can reduce power consumption.Meanwhile detection device 101 utilizes
The end ADC carried on communication device 103 obtains the voltage value on third divider resistance 13, does not need additional conversion chip,
It further reduced manufacturing cost.Third divider resistance is obtained after the conversion of internal simulation number according to the input at the end ADC
The corresponding digital signal of voltage value on 13, can be judged the state of external antenna 102 by communication device 103, can also be by
The processor connecting with communication device 103 judges the state of external antenna 102.
It should be noted that in embodiment provided by the disclosure, communication device 103 can be and meanwhile include GPIO,
Any communication module or communication chip of ADC and RF, such as: model Quectel AG35, Quectel SC20 it is logical
Believe chip.
In conclusion detection device provided by the disclosure includes: coupled capacitor, filter inductance, the first divider resistance,
Two divider resistances, third divider resistance and the 4th divider resistance.Wherein, the first end of the first divider resistance and the 4th divider resistance
First end connection, the first end of the second end of the first divider resistance and filter inductance connects, the second end of filter inductance and outer
Set antenna connection, the end GPIO of the second end of the 4th divider resistance and communication device connects, the first end of the second divider resistance with
The first end of 4th divider resistance connects, and the second end of the second divider resistance is connect with the first end of third divider resistance, third
The second end of divider resistance is grounded, and the first end of third divider resistance and the end ADC of communication device connect, and the first of coupled capacitor
End is connect with external antenna, and the second end of coupled capacitor and the end RF of communication device connect.The end GPIO of communication device is for giving
Detection device power supply, the end ADC is used to obtain the voltage value on third divider resistance, so as to according to the voltage value of third divider resistance
Determine the state of external antenna.By the inspection for realizing external antenna state using the included end GPIO of communication device and the end ADC
It surveys, structure is simple, and manufacturing cost is low, and the abnormality of external antenna can be effectively detected out, convenient for safeguarding.
Fig. 2 is the circuit diagram for the detection device for implementing another external antenna interface exemplified according to one, such as Fig. 2 institute
Show, the detection device 101 further include: electrostatic protection diode 18.
The first end of electrostatic protection diode 18 is connect with the first end of coupled capacitor 17, and the of electrostatic protection diode 18
Two ends ground connection.
Electrostatic protection diode 18 is used for release electrostatic electric current, to protect the end RF.
Exemplary, electrostatic protection diode 18 is a kind of overvoltage protection (English: Overvoltage
Protection Device), can release electrostatic electric current, such as can be ESD (English: Electro-Static
Discharge, Chinese: Electro-static Driven Comb) electrostatic protection diode.When external antenna 102 is when doing ESD test, need to pass through ESD
Rifle discharges to external antenna 102, and ESD rifle can generate biggish electric current in a short period of time, and the electric current can be rapid
Entire detection device 101 is influenced along circuit, therefore, when high current flows through electrostatic protection diode 18, electrostatic protection two
The electric current can be discharged into the earth by pole pipe 18, to play the role of protecting the end RF.Further, electrostatic protection diode 18
Parasitic capacitance should be less than 4pF, to guarantee the performance of communication device 103.
Fig. 3 is the circuit diagram for the detection device for implementing another external antenna interface exemplified according to one, such as Fig. 3 institute
Show, the detection device 101 further include: first diode 19a and the second diode 19b.
First diode 19a anode connect with the first end of the 4th divider resistance 14, the cathode of first diode 19a and
The anode connection of second diode 19b, the cathode ground connection of the second diode 19b, first diode 19a and the second diode 19b
It is composed in series clamp circuit.
When external antenna 102 is shorted to positive pole, the first divider resistance 11 is used for limiting electric current, filter inductance 16
In filtering, clamp circuit is used to protect the end GPIO of communication device 103.
For example, first diode 19a and the second diode 19b are composed in series clamp circuit, just using diode
To voltage clamping function, high voltage protective is carried out to detection device 101.For example, when external antenna 102 do short positive pole (+
When 24V) testing, high pressure can flow through the first divider resistance 11 and filter inductance 16, and the first divider resistance 11 can play current limliting
Effect, filter inductance 16 can play the role of filtering.First diode 19a and the second diode 19b can be by voltage clampings
(the corresponding clamp voltage 0.7V of each diode is summed) to+1.4V, the voltage+1.4V after clamp circuit clamper,
The voltage (i.e.+1.8V) being able to bear less than the end GPIO, therefore the end GPIO can be protected not destroyed by high pressure.
In conclusion detection device provided by the disclosure includes: coupled capacitor, filter inductance, the first divider resistance,
Two divider resistances, third divider resistance and the 4th divider resistance.Wherein, the first end of the first divider resistance and the 4th divider resistance
First end connection, the first end of the second end of the first divider resistance and filter inductance connects, the second end of filter inductance and outer
Set antenna connection, the end GPIO of the second end of the 4th divider resistance and communication device connects, the first end of the second divider resistance with
The first end of 4th divider resistance connects, and the second end of the second divider resistance is connect with the first end of third divider resistance, third
The second end of divider resistance is grounded, and the first end of third divider resistance and the end ADC of communication device connect, and the first of coupled capacitor
End is connect with external antenna, and the second end of coupled capacitor and the end RF of communication device connect.The end GPIO of communication device is for giving
Detection device power supply, the end ADC is used to obtain the voltage value on third divider resistance, so as to according to the voltage value of third divider resistance
Determine the state of external antenna.By the inspection for realizing external antenna state using the included end GPIO of communication device and the end ADC
It surveys, structure is simple, and manufacturing cost is low, and the abnormality of external antenna can be effectively detected out, convenient for safeguarding.
Fig. 4 is the block diagram for the detection system for implementing a kind of external antenna interface exemplified according to one, the detection system packet
It includes: the detection device 101 of any external antenna interface shown in external antenna 102, communication device 103 and Fig. 1 to Fig. 3.
External antenna 102 includes radiator 10 and pull down resistor 15, and the first end of radiator 10 is vacant, and the of radiator 10
Two ends are connect with the first end of pull down resistor 15, the second end ground connection of pull down resistor 15, the first end and detection of pull down resistor 15
Device 101 connects.
Optionally, when the end GPIO of communication device 103 exports high level, for being powered on for detection device 101, communication device
When 103 end GPIO exports low level, for closing detection device 101.
Communication device 103, the voltage value on third divider resistance 13 for being obtained according to the end ADC of communication device 103,
Determine the state of external antenna 102.
Exemplary, detection device 101 is powered using the end GPIO carried on communication device 103, is saved for electric resources,
Structure is simple, reduces manufacturing cost.The end GPIO can be controlled by communication device 103, when needing to detect external antenna 102
When state, and the control end GPIO output high level (such as :+1.8V), to power to detection device 101, when detection finishes, need to close
Close detection device 101, and the control end GPIO output low level (such as: 0V), can flexibly control detection device 101 plays on or off
It closes, avoids the energy that detection device 101 is constantly in working condition consumption, can reduce power consumption.Meanwhile detection device 101
The voltage value on third divider resistance 13 is obtained using the end ADC on communication device 103, does not need additional conversion chip,
It further reduced manufacturing cost.Communication device 103 is according to the input at the end ADC, after the conversion of internal simulation number, obtains the
The corresponding digital signal of voltage value on three divider resistances 13, can be judged the shape of external antenna 102 by communication device 103
State can also be judged the state of external antenna 102 by the processor connecting with communication device 103.
Optionally, communication device 103 is used for:
When the voltage value on third divider resistance 13 is preset first voltage, determine that external antenna 102 falls off.
When the voltage value on third divider resistance 13 is preset second voltage, determine that external antenna 102 is shorted to ground.
When the voltage value on third divider resistance 13 is preset tertiary voltage, determine that external antenna 102 is shorted to electricity
Source anode.
When the voltage value on third divider resistance 13 is preset four voltage, determine that external antenna 102 connects normally.
Wherein, first voltage be the voltage value exported according to the end GPIO of communication device, the resistance value of the second divider resistance 12,
The resistance value of the resistance value of third divider resistance 13 and the 4th divider resistance 14, the voltage value determined using the first formula.
Second voltage is the voltage value exported according to the end GPIO of communication device, the resistance value of the first divider resistance 11, second
The resistance value of the resistance value of divider resistance 12, the resistance value of third divider resistance 13 and the 4th divider resistance 14 is determined using the second formula
Voltage value.
Tertiary voltage is according to the resistance value and third divider resistance 13 of the clamp voltage of clamp circuit, the second divider resistance 12
Resistance value, utilize third formula determine voltage value.
4th voltage is the voltage value exported according to the end GPIO of communication device, the resistance value of the first divider resistance 11, second
Resistance value, the resistance value of third divider resistance 13, the resistance value of the 4th divider resistance 14 and the resistance value of pull down resistor 15 of divider resistance 12,
The voltage value determined using the 4th formula.
For example, the state of external antenna 102, which can be divided into, falls off, is shorted to ground, is shorted to positive pole or connection
Normal four kinds.When external antenna 102 falls off, it is equivalent to the disconnection of radiator 10, at this time in detection device 101, filter inductance 16
It is also disconnected with the first divider resistance 11, therefore the voltage of the end GPIO output is equivalent to as the second divider resistance 12, third partial pressure
The series circuit power supply formed between resistance 13 and the 4th divider resistance 14.According to the resistance value of the first divider resistance 11, second point
The resistance value of the resistance value of piezoresistance 12, the resistance value of third divider resistance 13 and the 4th divider resistance 14, can be true using the first formula
Determine first voltage.
When external antenna 102 is shorted to ground, being equivalent to 102 end of external antenna is ground, at this time in detection device 101, the
Two divider resistances 12 connect with third divider resistance 13 after resistance and in parallel with the first divider resistance 11, then with the 4th partial pressure electricity
14 series connection of resistance, therefore the voltage of the end GPIO output is equivalent to as the first divider resistance 11, the second divider resistance 12, third partial pressure electricity
The bleeder circuit power supply that resistance 13 and the 4th divider resistance 14 form.According to the resistance value of the first divider resistance 11, the second divider resistance
The resistance value of 12 resistance value, the resistance value of third divider resistance 13 and the 4th divider resistance 14 can determine second using the second formula
Voltage.
When external antenna 102 be shorted to positive pole (such as: when+24V), at this time by first diode 19a and the two or two
Pole pipe 19b composition clamp circuit by the voltage clamping between the first end and ground of the second divider resistance 12 to+1.4V (i.e.+
1.4V voltage is added on the circuit being composed in series by the second divider resistance 12 and third divider resistance 13).According to the second partial pressure electricity
The resistance value of resistance 12 and the resistance value of third divider resistance 13, utilize the confirmable tertiary voltage of third formula.
When external antenna 102 connects normal, the second divider resistance 12 connect with third divider resistance 13 after resistance, and
First divider resistance 11 connect with pull down resistor 15 after resistor coupled in parallel, then connect with the 4th divider resistance 14.Therefore the end GPIO
The voltage of output is equivalent to as the first divider resistance 11, the second divider resistance 12, third divider resistance 13, the 4th divider resistance 14
The bleeder circuit power supply formed with pull down resistor 15.According to the resistance value of the first divider resistance 11, the resistance value of the second divider resistance 12,
The resistance value of the resistance value of third divider resistance 13, the resistance value of the 4th divider resistance 14 and pull down resistor 15, can be with using the 4th formula
The 4th determining voltage.
Wherein, the first formula includes:
Wherein, V1Indicate first voltage, VIOIndicate the voltage value of the end the GPIO output of communication device 103, R2Indicate second
The resistance value of divider resistance 12, R3Indicate the resistance value of third divider resistance 13, R4Indicate the resistance value of the 4th divider resistance 14.
Second formula includes:
Wherein, V2Indicate second voltage, R1The resistance value of the first divider resistance 11 is stated in expression.
Third formula includes:
Wherein, V3Indicate tertiary voltage, VDIndicate the clamp voltage of clamp circuit.
4th formula includes:
Wherein, V4Indicate the 4th voltage, RmIndicate the resistance after the second divider resistance 12 is connected with third divider resistance 13,
The resistance value of resistor coupled in parallel after connecting with the first divider resistance 11 with pull down resistor 15, R5Indicate the resistance value of pull down resistor 15.
In conclusion detection system provided by the disclosure includes: external antenna, communication device and external antenna interface
Detection device, wherein detection device includes: coupled capacitor, filter inductance, the first divider resistance, the second divider resistance, third point
Piezoresistance and the 4th divider resistance.Wherein, the first end of the first divider resistance is connect with the first end of the 4th divider resistance, and first
The second end of divider resistance and the first end of filter inductance connect, and the second end of filter inductance is connect with external antenna, and the 4th point
The second end of piezoresistance and the end GPIO of communication device connect, and the first of the first end of the second divider resistance and the 4th divider resistance
End connection, the second end of the second divider resistance are connect with the first end of third divider resistance, the second termination of third divider resistance
Ground, the first end of third divider resistance and the end ADC of communication device connect, and the first end of coupled capacitor is connect with external antenna,
The second end of coupled capacitor and the end RF of communication device connect.The end GPIO of communication device is used to power to detection device, the end ADC
For obtaining the voltage value on third divider resistance, to determine the shape of external antenna according to the voltage value of third divider resistance
State.External antenna includes radiator and pull down resistor, and the first end of radiator is vacant, the second end of radiator and pull down resistor
First end connection, the second end ground connection of pull down resistor, the first end of pull down resistor are connect with detection device.By utilizing communication dress
The included end GPIO and the end ADC are set to realize the detection of external antenna state, structure is simple, and manufacturing cost is low, can be effectively
Detect the abnormality of external antenna, it is convenient for safeguarding.
Fig. 5 is the block diagram of a kind of electronic equipment 300 shown according to an exemplary embodiment.As shown in figure 5, the electronics is set
Standby 300 may include: processor 301, memory 302.The electronic equipment 300 can also include multimedia component 303, input/
Export one or more of (I/O) interface 304 and communication device 103.
Wherein, processor 301 is used to control the integrated operation of the electronic equipment 300, above-mentioned according to communication dress to complete
The step of setting the voltage value on the third divider resistance of 103 end ADC acquisition, determining the state of external antenna 102.Memory
302 for storing various types of data to support the operation in the electronic equipment 300, these data for example may include being used for
The instruction and the relevant data of application program of any application or method operated on the electronic equipment 300, such as join
It is personal data, the message of transmitting-receiving, picture, audio, video etc..The memory 302 can be by any kind of volatibility or non-
Volatile storage devices or their combination are realized, such as static random access memory (Static Random Access
Memory, abbreviation SRAM), electrically erasable programmable read-only memory (Electrically Erasable Programmable
Read-Only Memory, abbreviation EEPROM), Erasable Programmable Read Only Memory EPROM (Erasable Programmable
Read-Only Memory, abbreviation EPROM), programmable read only memory (Programmable Read-Only Memory, letter
Claim PROM), read-only memory (Read-Only Memory, abbreviation ROM), magnetic memory, flash memory, disk or CD.
Multimedia component 303 may include screen and audio component.Wherein screen for example can be touch screen, and audio component is for exporting
And/or input audio signal.For example, audio component may include a microphone, microphone is for receiving external audio signal.
The received audio signal can be further stored in memory 302 or be sent by communication device 103.Audio component also wraps
At least one loudspeaker is included, output audio signal is used for.I/O interface 304 provides between processor 301 and other interface modules
Interface, other above-mentioned interface modules can be keyboard, mouse, button etc..These buttons can be virtual push button or entity is pressed
Button.Communication device 103 is for carrying out wired or wireless communication between the electronic equipment 300 and other equipment.Wireless communication, such as
Wi-Fi, bluetooth, near-field communication (Near Field Communication, abbreviation NFC), 2G, 3G or 4G or in them one
Kind or several combinations, therefore the corresponding communication device 103 may include: Wi-Fi module, bluetooth module, NFC module.
In one exemplary embodiment, electronic equipment 300 can be by one or more application specific integrated circuit
(Application Specific Integrated Circuit, abbreviation ASIC), digital signal processor (Digital
Signal Processor, abbreviation DSP), digital signal processing appts (Digital Signal Processing Device,
Abbreviation DSPD), programmable logic device (Programmable Logic Device, abbreviation PLD), field programmable gate array
(Field Programmable Gate Array, abbreviation FPGA), controller, microcontroller, microprocessor or other electronics member
Part is realized, for executing the voltage value on the above-mentioned third divider resistance obtained according to the end ADC of communication device 103, is determined
The step of state of external antenna 102.
The preferred embodiment of the disclosure is described in detail in conjunction with attached drawing above, still, the disclosure is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the disclosure, those skilled in the art are considering specification and practice
After the disclosure, it is readily apparent that other embodiments of the disclosure, belongs to the protection scope of the disclosure.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, it can be combined in any appropriate way.Simultaneously between a variety of different embodiments of the disclosure
Any combination can also be carried out, as long as it, without prejudice to the thought of the disclosure, equally should be considered as disclosure disclosure of that.
The disclosure is not limited to the precision architecture being described above out, and the scope of the present disclosure is only limited by the attached claims
System.
Claims (9)
1. a kind of detection device of external antenna interface, which is characterized in that the detection device respectively with external antenna and communication
Device connection, the detection device include: coupled capacitor (17), filter inductance (16), the first divider resistance (11), the second partial pressure
Resistance (12), third divider resistance (13) and the 4th divider resistance (14)；
The first end of first divider resistance (11) is connect with the first end of the 4th divider resistance (14), and described first point
The second end of piezoresistance (11) is connect with the first end of the filter inductance (16), the second end of the filter inductance (16) and institute
State external antenna connection, the second end of the 4th divider resistance (14) and the general input/output port GPIO of the communication device
End connection, the first end of second divider resistance (12) connect with the first end of the 4th divider resistance (14), and described the
The second end of two divider resistances (12) is connect with the first end of the third divider resistance (13), the third divider resistance (13)
Second end ground connection, the first end of the third divider resistance (13) connect with the end ADC of the communication device, and the coupling is electric
The first end for holding (17) is connect with the external antenna, the second end of the coupled capacitor (17) and the end RF of the communication device
Connection.
2. detection device according to claim 1, which is characterized in that the detection device further include: two pole of electrostatic protection
It manages (18)；
The first end of the electrostatic protection diode (18) is connect with the first end of the coupled capacitor (17), the electrostatic protection
The second end of diode (18) is grounded；
The electrostatic protection diode (18) is used for release electrostatic electric current, to protect the end RF.
3. detection device according to claim 1 or 2, which is characterized in that the detection device further include: first diode
(19a) and the second diode (19b)；
The anode of the first diode (19a) is connect with the first end of the 4th divider resistance (14), the one or two pole
The cathode for managing (19a) is connect with the anode of second diode (19b), the cathode ground connection of second diode (19b), institute
It states first diode (19a) and second diode (19b) is composed in series clamp circuit；
When the external antenna is shorted to positive pole, first divider resistance (11) is for limiting electric current, the filtering
For inductance (16) for filtering, the clamp circuit is used to protect the end GPIO of the communication device.
4. a kind of detection system of external antenna interface, which is characterized in that the detection system includes: external antenna, communication dress
Set the detection device with external antenna interface of any of claims 1-3；
The external antenna includes radiator (10) and pull down resistor (15), and the first end of the radiator (10) is vacant, described
The second end of radiator (10) is connect with the first end of the pull down resistor (15), the second termination of the pull down resistor (15)
The first end on ground, the pull down resistor (15) is connect with the detection device.
5. detection system according to claim 4, which is characterized in that the end GPIO of the communication device exports high level
When, for being powered on for the detection device, when the end GPIO of the communication device exports low level, for closing the detection dress
It sets；
The communication device, the electricity on the third divider resistance (13) for being obtained according to the end ADC of the communication device
Pressure value determines the state of the external antenna.
6. detection system according to claim 5, which is characterized in that the communication device is used for:
When the voltage value on the third divider resistance (13) is preset first voltage, determine that the external antenna falls off；
When the voltage value on the third divider resistance (13) is preset second voltage, determine that the external antenna is shorted to
Ground；
When the voltage value on the third divider resistance (13) is preset tertiary voltage, determine that the external antenna is shorted to
Positive pole；
When the voltage value on the third divider resistance (13) is preset four voltage, the external antenna connection is being determined just
Often.
7. detection system according to claim 6, which is characterized in that the first voltage is according to the communication device
Voltage value, the resistance value of second divider resistance (12), the resistance value of the third divider resistance (13) and the institute of the end GPIO output
The resistance value for stating the 4th divider resistance (14), the voltage value determined using the first formula；
The second voltage is the voltage value exported according to the end GPIO of the communication device, first divider resistance (11)
Resistance value, the resistance value of second divider resistance (12), the resistance value of the third divider resistance (13) and the 4th divider resistance
(14) resistance value, the voltage value determined using the second formula；
The tertiary voltage is according to the clamp voltage of the clamp circuit, the resistance value of second divider resistance (12) and described
The resistance value of third divider resistance (13), the voltage value determined using third formula；
4th voltage is the voltage value exported according to the end GPIO of the communication device, first divider resistance (11)
Resistance value, the resistance value of second divider resistance (12), the resistance value of the third divider resistance (13), the 4th divider resistance
(14) resistance value of resistance value and the pull down resistor (15), the voltage value determined using the 4th formula.
8. detection system according to claim 7, which is characterized in that first formula includes:
Wherein, V1Indicate the first voltage, VIOIndicate the voltage value of the end the GPIO output of the communication device, R2Described in expression
The resistance value of second divider resistance (12), R3Indicate the resistance value of the third divider resistance (13), R4Indicate the 4th divider resistance
(14) resistance value；
Second formula includes:
Wherein, V2Indicate the second voltage, R1The resistance value of the first divider resistance (11) is stated in expression；
The third formula includes:
Wherein, V3Indicate the tertiary voltage, VDIndicate the clamp voltage of the clamp circuit；
4th formula includes:
Wherein, V4Indicate the 4th voltage, RmIndicate that second divider resistance (12) and the third divider resistance (13) are gone here and there
Resistance and first divider resistance (11) after connection connect with the pull down resistor (15) after resistor coupled in parallel resistance value, R5
Indicate the resistance value of the pull down resistor (15).
9. a kind of electronic equipment, which is characterized in that the electronic equipment includes: external antenna, communication device and claim 1-3
Any one of described in external antenna interface detection device, the electronic equipment includes:
Processor；
Memory for storage processor executable instruction；
Wherein, the processor is configured to: according to the end ADC of the communication device obtain the third divider resistance (13)
On voltage value, determine the state of the external antenna, the state of the external antenna includes: to fall off, be shorted to ground, be shorted to
Positive pole or connection are normal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821935853.4U CN209296821U (en) | 2018-11-22 | 2018-11-22 | Detection device, system and the electronic equipment of external antenna interface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821935853.4U CN209296821U (en) | 2018-11-22 | 2018-11-22 | Detection device, system and the electronic equipment of external antenna interface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209296821U true CN209296821U (en) | 2019-08-23 |
Family
ID=67645787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821935853.4U Active CN209296821U (en) | 2018-11-22 | 2018-11-22 | Detection device, system and the electronic equipment of external antenna interface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209296821U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110488102A (en) * | 2019-08-28 | 2019-11-22 | 深圳市朗仁科技有限公司 | Antenna falls off detection circuit |
| CN110994204A (en) * | 2019-12-30 | 2020-04-10 | 深圳市有方科技股份有限公司 | External antenna circuit and external antenna device |
-
2018
- 2018-11-22 CN CN201821935853.4U patent/CN209296821U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110488102A (en) * | 2019-08-28 | 2019-11-22 | 深圳市朗仁科技有限公司 | Antenna falls off detection circuit |
| CN110994204A (en) * | 2019-12-30 | 2020-04-10 | 深圳市有方科技股份有限公司 | External antenna circuit and external antenna device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10983152B2 (en) | USB data pin impedance detection | |
| CN101398459B (en) | Method and device for identifying charger type | |
| CN102013927B (en) | Communication equipment and antenna testing device | |
| US8595558B2 (en) | Computer turn on/off testing apparatus | |
| CN209296821U (en) | Detection device, system and the electronic equipment of external antenna interface | |
| TWI427883B (en) | Over-voltage protection circuit, method and computer program product for operating the same and mobile device | |
| CN108352704B (en) | A kind of electrostatic discharge protective circuit | |
| CN102005795A (en) | Electric quantity detecting device for rechargeable battery | |
| CN105676054B (en) | Cable reversal connection and short-circuit detecting circuit | |
| CN101135710A (en) | Circuit for detecting radio-frequency power amplifier output terminal port communicating condition | |
| CN108390432B (en) | Charging circuit and electronic cigarette | |
| CN203242716U (en) | Battery, battery type detection circuit and mobile terminal | |
| CN208367144U (en) | connection state diagnostic circuit and vehicle | |
| US20130328405A1 (en) | Ground test circuit | |
| CN105172612A (en) | Device for detecting connecting state of charging equipment and electric automobile | |
| CN208862584U (en) | A kind of integrated charge battery protection functional circuit, single-chip microcontroller and charge-discharge circuit | |
| CN207219048U (en) | SIM card batch detecting device | |
| US11132144B2 (en) | Integrated interface and electronic device | |
| CN103166062A (en) | Electronic device and connector thereof | |
| CN104124678B (en) | Lightning protection isolator and lightning protection isolation circuit | |
| CN206640354U (en) | Can accumulative power source internal rechargeable battery charging times hand-held mobile power supply | |
| CN101498766A (en) | Test apparatus for charging function of electronic product | |
| CN204008905U (en) | USB interface measurement jig | |
| CN109946528A (en) | Antenna detection circuit in place, methods, devices and systems, wireless terminal | |
| CN108761162A (en) | A kind of oscilloprobe control system and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |