CN108599790A - Internet of Things radio circuit and terminal based on plasma antenna and stable type - Google Patents
Internet of Things radio circuit and terminal based on plasma antenna and stable type Download PDFInfo
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- CN108599790A CN108599790A CN201810292572.XA CN201810292572A CN108599790A CN 108599790 A CN108599790 A CN 108599790A CN 201810292572 A CN201810292572 A CN 201810292572A CN 108599790 A CN108599790 A CN 108599790A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
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Abstract
The present invention relates to a kind of Internet of Things radio circuit and terminal based on plasma antenna and stable type, embodiment disclose a kind of signal processing circuit, are applied to internet-of-things terminal, and the circuit includes：Antenna, the first filter circuit, switching circuit, low noise amplifier circuit, mixting circuit, programmable logic amplifying circuit and ADC；The antenna includes radiator, feed circuit, control circuit, the first protection circuit, match circuit and the second filter circuit；The feed end of radiator is connected with the input terminal of the first end of feed circuit, match circuit; the second end of feed circuit is connected with the control terminal of control circuit; the second end of match circuit is connected with the input terminal of the second filter circuit; the output end of second filter circuit is connected with the output end of antenna; first protection circuit is used for when feed circuit is in preset state, and single ended voltage is provided for radiator；With this, can improving stability and anti-interference ability to a certain extent, and then improve treatment effect of the modem to signal to a certain extent.
Description
Technical field
The present invention relates to circuit structure technical field more particularly to a kind of Internet of Things based on plasma antenna and stable type
Radio circuit and terminal.
Background technology
With the fast development of technology of Internet of things, the various terminals product of Internet of Things gradually spreads to daily life
In, the every aspect in life is applied, is brought great convenience to daily life.While Internet of Things is quickly popularized,
Since internet-of-things terminal products application is in complex environment so that its when in face of more strongly disturbing environment equally can with compared with
Good performance has become a kind of development trend, and existing internet-of-things terminal connects when interfering in stronger environment in signal
Time receiving, there are still many deficiencies, such as cannot shield interference signal well, simultaneously because the stability of its own circuit is insufficient,
It is easy so that the signal-to-noise ratio of the docking collection of letters number declines, unfavorable modem is in the processing to signal.
Invention content
An embodiment of the present invention provides a kind of Internet of Things radio circuit and terminal based on plasma antenna and stable type, energy
Enough improving stability and anti-interference ability to a certain extent, and then modem is improved to a certain extent to signal
Treatment effect.
The first aspect of the embodiment of the present invention provides a kind of signal receiving circuit, is applied to internet-of-things terminal, the electricity
Road includes：Antenna, the first filter circuit, switching circuit, low noise amplifier circuit, mixting circuit, programmable logic amplifying circuit
And ADC；
The output end of the antenna is connected with the input terminal of first filter circuit, first filter circuit it is defeated
Outlet is connected with the input terminal of the switching circuit, and the output end of the switching circuit is defeated with the low noise amplifier circuit
Enter end to be connected, the output end of the low noise amplifier circuit is connected with the input terminal of the mixting circuit, the mixing electricity
The output end on road is connected with the input terminal of the programmable logic amplifying circuit, the output of the programmable logic amplifying circuit
End is connected with the input terminal of the ADC；
The antenna includes radiator, feed circuit, control circuit, the first protection circuit, match circuit and the second filtering
Circuit；The feed end of the radiator is connected with the input terminal of the first end of the feed circuit, the match circuit, described
The second end of feed circuit is connected with the control terminal of the control circuit, and the second end of the match circuit is filtered with described second
The input terminal of wave circuit is connected, and the output end of second filter circuit is connected with the output end of the antenna, and described
One protection circuit is used for when the feed circuit is in preset state, and single ended voltage is provided for the radiator；
The low noise amplifier circuit includes stability enhancing circuit, stability enhancing circuit with the low noise
The output end of amplifying circuit is connected and the stability for enhancing the low noise amplifier circuit.
In conjunction with the embodiment of the present invention in a first aspect, in the first possible realization method of first aspect, described
One protection circuit includes the first MCU and driving source, and whether the dbjective state that the first MCU is used to detect the feed circuit is located
In preset state, control instruction is sent to the driving source if the dbjective state is in preset state；The driving source is used
Pumping signal is generated in the reception control instruction, and according to the control instruction.
In conjunction with the first aspect of the embodiment of the present invention and the first possible realization method of first aspect, in first aspect
Second of possible realization method in, first filter circuit includes：First filter part, second filter part, third
Filtering device, the 4th filtering device, the 5th filtering device, the 6th filtering device, the 7th filtering device, the 8th filtering device,
Nine filtering devices and the tenth filtering device；
The first end of the first end of the first filter part and the second filter part, the 5th filtering device
First end is connected, the first end of the second end of the first filter part and the 7th filtering device, the 9th filtering
The first end of device is connected, the first end of the second end of the second filter part and the third filtering device, described the
The first end of four filtering devices, the first end of the 6th filtering device are connected, the second end of the third filtering device with
The second end of 4th filtering device, the second end of the 8th filtering device, the second end phase of the tenth filtering device
Connection, the second end of the second end of the 6th filtering device and the 5th filtering device, the 7th filtering device the
Two ends, the 8th filtering device first end be connected, the second end of the 9th filtering device and the tenth filter
The first end of part is connected, first end, the third of the input terminal of first filter circuit and the first filter part
The second end of filtering device is connected, the first end of the output end of first filter circuit and the tenth filtering device and the
Two ends are connected.
In conjunction with the first aspect of the embodiment of the present invention and the first possible realization method of first aspect, in first aspect
The third possible realization method in, the low noise amplifier circuit includes：The first transistor, second transistor, third are brilliant
Body pipe, the first capacitance, the second capacitance, third capacitance, the 4th capacitance, stability enhancing circuit, the first inductance, the second inductance, the
Three inductance, the 4th inductance, the 5th inductance, the 6th inductance, the first power supply, second source, third power supply, the 4th power supply and the 5th electricity
Source；
The input terminal of the low noise amplifier circuit and the output end of first power supply, the input terminal of first inductance
It is connected, the output end of first inductance is connected with the grid of the input terminal of second capacitance, the first transistor,
The output end of second capacitance is grounded, and the source electrode of the first transistor is connected with the input terminal of second inductance, institute
The output end ground connection of the second inductance is stated, the drain electrode of the first transistor is connected with the source electrode of the second transistor, described
The grid of second transistor is connected with the input terminal of the output end of the 4th inductance, the third capacitance, the third electricity
The output end of appearance is grounded, and the input terminal of the 4th inductance is connected with the output end of the second source, second crystal
The drain electrode of pipe is connected with the input terminal of the output end of the third inductance, first capacitance, the input of the third inductance
End is connected with the output end of the third power supply, and the output end of first capacitance is connected with the source electrode of the third transistor
It connects, the grid of the third transistor is connected with the output end of the 5th inductance, the input terminal of the 5th inductance and institute
The output end for stating the 4th power supply is connected, the drain electrode of the third transistor and the output end of the 6th inductance, the described 4th
The input terminal of capacitance is connected, and the input terminal of the 6th inductance is connected with the output end of the 5th power supply, and the described 4th
The input terminal that the output end of capacitance enhances circuit with the stability is connected, the output end of the stability enhancing circuit and institute
The output end for stating low noise amplifier circuit is connected.
It is described to open in conjunction with the embodiment of the present invention in a first aspect, in the 4th kind of possible realization method of first aspect
Powered-down road includes：8 receiving circuit ports, 8 receiving circuit ports are separately connected 4 groups of receiving circuits, every group of reception electricity
Road connects 2 receiving ports, and 2 receiving ports are used to receive the electromagnetic wave of different frequency.
It is described steady in conjunction with the embodiment of the present invention in a first aspect, in the 5th kind of possible realization method of first aspect
Qualitative enhancing circuit includes the 7th inductance, the 8th inductance, the 5th capacitance, the 6th capacitance, the 7th capacitance, first resistor and second
MCU；
The second end of 7th inductance and the 5th capacitance, the first end of the 6th capacitance, the 8th inductance
First end be connected, the second end of the 5th capacitance and the second end of the 6th capacitance, the 7th capacitance second
End, the first resistor second end be connected, it is the second end of the 8th inductance and the first end of the 7th capacitance, described
The first end of first resistor is connected, the first end of the 2nd MCU and the 7th inductance, the second of the 5th capacitance
End, the first end of the first resistor, the second end of the first resistor be connected and the 2nd MCU respectively with it is described
7th inductance, the 8th inductance, the 5th capacitance, the 6th capacitance, the 7th capacitance, the first resistor are connected
It connects, the electricity for detecting and adjusting the inductance value of the 7th inductance, the inductance value of the 8th inductance, the 5th capacitance
The resistance value of capacitance, the capacitance of the 6th capacitance, the capacitance and the first resistor of the 7th capacitance.
In conjunction with the embodiment of the present invention first aspect to first aspect the 5th kind of possible realization method, in first aspect
The 6th kind of possible realization method in, the circuit further includes the second protection circuit, it is described second protection circuit be used in institute
Antenna is stated by providing protection when predeterminated voltage for the circuit.
The second aspect of the embodiment of the present invention provides a kind of chip, which includes processor, power circuit and above-mentioned
The signal processing circuit for appointing any possible realization method of first aspect or first aspect to be provided.
The third aspect of the embodiment of the present invention provides a kind of circuit board, which includes modem, at signal
The chip of device and the offer of second aspect of the embodiment of the present invention is provided.
The fourth aspect of the embodiment of the present invention provides a kind of internet-of-things terminal, which includes shell and Ben Fa
The circuit board that the bright embodiment third aspect provides.
The embodiment of the present invention has the advantages that：
As can be seen that through the embodiment of the present invention, signal receiving circuit antenna, the first filter circuit, switching circuit, low noise
Sound amplifying circuit, mixting circuit, programmable logic amplifying circuit and ADC, foregoing circuit element is sequentially connected, while antenna includes
Radiator, feed circuit, control circuit, the first protection circuit, match circuit and the second filter circuit；The feed end of radiator
It is connected with the input terminal of the first end of feed circuit, match circuit, the second end of feed circuit and the control terminal of control circuit
It is connected, the second end of match circuit is connected with the input terminal of the second filter circuit, the output end and day of the second filter circuit
The output end of line is connected, and the first protection circuit is used for when feed circuit is in preset state, and single-ended electricity is provided for radiator
Pressure；Low noise amplifier circuit includes stability enhancing circuit, and stability enhances the output end with low noise amplifier circuit of circuit
It is connected and the stability for enhancing low noise amplifier circuit, the antenna has the characteristic of strong antijamming capability and low
Noise amplifier circuit output end connective stability enhances circuit, can enhance the anti-interference of signal receiving circuit to a certain extent
Characteristic and stability, to which enhanced modulation demodulator is to the processing capacity of signal.
Description of the drawings
Technical solution in order to illustrate the embodiments of the present invention more clearly, below will be to needed in embodiment description
Attached drawing is briefly described.
Fig. 1 is that an embodiment of the present invention provides a kind of structural schematic diagrams of signal processing circuit；
Fig. 2 is that an embodiment of the present invention provides a kind of structural schematic diagrams of first filter circuit；
Fig. 3 is that an embodiment of the present invention provides a kind of structural schematic diagrams of low noise amplifier circuit；
Fig. 4 is that an embodiment of the present invention provides the structural schematic diagrams that a kind of stability enhances circuit；
Fig. 5 is that an embodiment of the present invention provides a kind of structural schematic diagrams of second protection circuit；
Fig. 6 is that an embodiment of the present invention provides a kind of possible structural schematic diagrams of chip；
Fig. 7 is that an embodiment of the present invention provides a kind of possible structural schematic diagrams of circuit board.
Specific implementation mode
Below in conjunction with the attached drawing in embodiment of the present invention, the technical solution in embodiment of the present invention is carried out clear
Chu is fully described by, it is clear that described embodiment is only some embodiments of the invention, rather than whole realities
Apply mode.Based on the embodiment in the present invention, those of ordinary skill in the art institute without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
Term " first ", " second " in description and claims of this specification and above-mentioned attached drawing etc. are for distinguishing
Different objects, rather than for describing particular order.In addition, term " comprising " and " having " and their any deformations, it is intended that
It is to cover and non-exclusive includes.Such as process, method, system, product or the equipment for containing series of steps or unit do not have
It is defined in the step of having listed or unit, but further includes the steps that optionally not listing or unit, or optionally also wrap
It includes for other intrinsic steps of these processes, method, product or equipment or unit.
" embodiment " is referred in the present invention it is meant that a particular feature, structure, or characteristic described can be in conjunction with the embodiments
It is included at least one embodiment of the present invention.The phrase, which occurs, in each position in the description might not each mean phase
Same embodiment, nor the independent or alternative embodiment with other embodiments mutual exclusion.Those skilled in the art are explicitly
Implicitly understand, embodiment described in the invention can be combined with other embodiments.
Referring to Fig. 1, Fig. 1 is that an embodiment of the present invention provides a kind of structural schematic diagrams of signal processing circuit.Such as Fig. 1 institutes
Show, signal processing circuit, be applied to internet-of-things terminal, the circuit includes：Antenna 101, the first filter circuit 102, switch electricity
Road 103, low noise amplifier circuit 104, mixting circuit 105, programmable logic amplifying circuit 106 and ADC 107；
The output end of antenna 101 is connected with the input terminal of the first filter circuit 102, the output of the first filter circuit 102
End is connected with the input terminal of switching circuit 103, the input terminal of the output end and low noise amplifier circuit 104 of switching circuit 103
It is connected, the output end of low noise amplifier circuit 104 is connected with the input terminal of mixting circuit 105, the output of mixting circuit 105
End is connected with the input terminal of programmable logic amplifying circuit 106, the output end and ADC of programmable logic amplifying circuit 106
107 input terminal is connected；
Antenna 101 includes radiator, feed circuit, control circuit, the first protection circuit, match circuit and the second filtering
Circuit；The feed end of radiator is connected with the input terminal of the first end of feed circuit, match circuit, the second end of feed circuit
It is connected with the control terminal of control circuit, the second end of match circuit is connected with the input terminal of the second filter circuit, the second filter
The output end of wave circuit is connected with the output end of antenna, and the first protection circuit is used for when feed circuit is in preset state,
Single ended voltage is provided for radiator；
Low noise amplifier circuit 104 include stability enhance circuit, stability enhance circuit and low noise amplifier circuit
104 output end is connected and the stability for enhancing low noise amplifier circuit.
As can be seen that through the embodiment of the present invention, signal receiving circuit antenna, the first filter circuit, switching circuit, low noise
Sound amplifying circuit, mixting circuit, programmable logic amplifying circuit and ADC, foregoing circuit element is sequentially connected, while antenna includes
Radiator, feed circuit, control circuit, the first protection circuit, match circuit and the second filter circuit；The feed end of radiator
It is connected with the input terminal of the first end of feed circuit, match circuit, the second end of feed circuit and the control terminal of control circuit
It is connected, the second end of match circuit is connected with the input terminal of the second filter circuit, the output end and day of the second filter circuit
The output end of line is connected, and the first protection circuit is used for when feed circuit is in preset state, and single-ended electricity is provided for radiator
Pressure；Low noise amplifier circuit includes stability enhancing circuit, and stability enhances the output end with low noise amplifier circuit of circuit
It is connected and the stability for enhancing low noise amplifier circuit, the antenna has the characteristic of strong antijamming capability and low
Noise amplifier circuit output end connective stability enhances circuit, can enhance the anti-interference of signal receiving circuit to a certain extent
Characteristic and stability, to which enhanced modulation demodulator is to the processing capacity of signal.
In one possible example, the first protection circuit includes the first MCU and driving source, and the first MCU is fed for detecting
Whether the dbjective state of circuit is in preset state, and control instruction is sent to driving source if dbjective state is in preset state；
Driving source generates pumping signal for receiving control instruction, and according to control instruction, wherein MCU is micro-control unit
(Microcontroller Unit)。
Optionally, preset state is the frequency range emitted the signal of different frequency range, can be arranged by system default,
Can the frequency range that residing environment can be applicable in can also be interrupted according to Internet of Things by user's sets itself.
Optionally, filtering device for example can be acoustic surface wave filter device, and signal is passed through electricity by SAW filter
Signal is converted into acoustic signals, then converts acoustic signals to electric signal again, to be filtered out with good selecting frequency characteristic
Noise signal in signal, enhances filter effect to a certain extent, so as to inhibit to a certain extent by sound table
Out-of-band noise after surface wave filter circuit in signal.
In one possible example, referring to Fig. 2, Fig. 2 is that an embodiment of the present invention provides a kind of first filter circuits
Structural schematic diagram.As shown in Fig. 2, first filter circuit includes：First filter part 201, second filter part 202,
Three filtering devices 203, the 4th filtering device 204, the 5th filtering device 205, the 6th filtering device 206, the 7th filtering device
207, the 8th filtering device 208, the 9th filtering device 209 and the tenth filtering device 210；
The of the first end of first filter part 201 and the first end of second filter part 202, the 5th filtering device 205
One end is connected, the first end of the second end of first filter part 201 and the 7th filtering device 207, the 9th filtering device 209
First end is connected, the second end of second filter part 202 and the first end of third filtering device 203, the 4th filtering device 204
First end, the first end of the 6th filtering device 206 be connected, the second end of third filtering device 203 and the 4th filtering device
204 second end, the second end of the 8th filtering device 208, the second end of the tenth filtering device 210 are connected, the 6th filter
The second end, the second end of the 7th filtering device 207, the 8th filtering device of the second end of part 206 and the 5th filtering device 205
208 first end is connected, and the second end of the 9th filtering device 209 is connected with the first end of the tenth filtering device 210, and first
The input terminal of filter circuit is connected with the second end of the first end of first filter part 201, third filtering device 203, and first
The output end of filter circuit is connected with the first end and second end of the tenth filtering device 210.
By being arranged in parallel ten SAW devices first, then in series surface acoustic wave in parallel branch
Device, above-mentioned surface acoustic wave filter circuit can be understood as being provided with multistage grade filter circuit, and multistage grade filter circuit can have
There is higher Out-of-band rejection, can preferably filter out the noise signal in signal, it, can be in list by series surface acoustic wave device
Only branch road boostfiltering effect, and then the filter effect of integrated circuit can be promoted to a certain extent, to promotion pair
The inhibition of out of band signal.
In one possible example, referring to Fig. 3, Fig. 3 is that an embodiment of the present invention provides a kind of low noise amplifier circuits
Structural schematic diagram.As shown in figure 3, low noise amplifier circuit includes：The first transistor T1, second transistor T2, third crystal
Pipe T3, the first capacitance C1, the second capacitance C2, third capacitance C3, the 4th capacitance C4, stability enhancing circuit 306, the first inductance
L1, the second inductance L2, third inductance L3, the 4th inductance L4, the 5th inductance L5, the 6th inductance L6, first the 301, second electricity of power supply
Source 302, third power supply 303, the 4th power supply 304 and the 5th power supply 305；
The input terminal of low noise amplifier circuit is connected with the input terminal of the output end of the first power supply 301, the first inductance L1,
The output end of first inductance L1 is connected with the grid of the input terminal of the second capacitance C2, the first transistor T1, the second capacitance C2's
Output end is grounded, and the source electrode of the first transistor T1 is connected with the input terminal of the second inductance L2, the output termination of the second inductance L2
The drain electrode on ground, the first transistor T1 is connected with the source electrode of second transistor T2, the grid of second transistor T2 and the 4th inductance
The output end of L4, the input terminal of third capacitance C3 are connected, the output end ground connection of third capacitance C3, the input terminal of the 4th inductance L4
It is connected with the output end of second source 302, the drain electrode of second transistor T2 and the output end of third inductance L3, the first capacitance C1
Input terminal be connected, the input terminal of third inductance L3 is connected with the output end of third power supply 303, the output of the first capacitance C1
End is connected with the source electrode of third transistor T3, and the grid of third transistor T3 is connected with the output end of the 5th inductance L5, the
The input terminal of five inductance L5 is connected with the output end of the 4th power supply 304, and the drain electrode of third transistor T3 is with the 6th inductance L6's
Output end, the 4th capacitance C4 input terminal be connected, the input terminal of the 6th inductance L6 is connected with the output end of the 5th power supply 305
It connects, the output end of the 4th capacitance C4 is connected with the input terminal of stability enhancing circuit 306, and stability enhances the defeated of circuit 306
Outlet is connected with the output end of low noise amplifier circuit.
Signal inputs low noise amplifier circuit from input terminal in, and the first inductance carries out the high-frequency signal in input signal
It filters out, removes the signal of high fdrequency component then after the first field-effect transistor is amplified from the first field-effect transistor
Then drain electrode output inputs the second field-effect tube from the source electrode of the second field-effect tube, then afterwards by capacitance to by second effect
DC component that should be in the signal of pipe is filtered out, then after enhancing circuit by stability afterwards, and setting stability enhances circuit can
The stability for promoting low noise amplifier circuit, finally obtains amplified output signal from output end out, by promoting low noise
The stability of amplifying circuit can be reduced because low noise amplifier circuit is because stability caused by outside or inside environment drops
It is low, so as to promote the signal-to-noise ratio of output signal to a certain extent, and then modulatedemodulate can be improved to a certain extent
Adjust treatment effect of the device to signal.
In one possible example, the switching circuit includes：8 receiving circuit ports, 8 receiving circuit ports
4 groups of receiving circuits are separately connected, every group of receiving circuit connects 2 receiving ports, and 2 receiving ports are for receiving difference
The electromagnetic wave of frequency.
In one possible example, referring to Fig. 4, Fig. 4 is that an embodiment of the present invention provides a kind of stability to enhance circuit
Structural schematic diagram.As shown in figure 4, the stability enhancing circuit includes the 7th inductance L7, the 8th inductance L8, the 5th capacitance
C5, the 6th capacitance C6, the 7th capacitance C7, first resistor R1 and the 2nd MCU 401；
The second end of 7th inductance L7 and the 5th capacitance C5, the first end of the 6th capacitance C6, the first end of the 8th inductance L8
It is connected, the second end of the 5th capacitance C5 and the second end of the 6th capacitance C6, the second end of the 7th capacitance C7, first resistor R1
Second end is connected, and the second end of the 8th inductance L8 is connected with the first end of the 7th capacitance C7, the first end of first resistor R1,
The first end of 2nd MCU 401 and the 7th inductance L7, the second end of the 5th capacitance C5, the first end of first resistor R1, the first electricity
Resistance R1 second end be connected and the 2nd MCU 401 respectively with the 7th inductance L7, the 8th inductance L8, the 5th capacitance C5, the 6th
Capacitance C6, the 7th capacitance C7, first resistor R1 are connected, and the 2nd MCU 401 is used to detect and adjust the electricity of the 7th inductance L7
The electricity of inductance value, the inductance value of the 8th inductance L8, the capacitance of the 5th capacitance C5, the capacitance of the 6th capacitance C6, the 7th capacitance C7
The resistance value of capacitance and first resistor R1.
Optionally, the 2nd MCU adjusts the electricity of the 7th inductance when detecting that low noise amplifier circuit stability reduces
Inductance value, the inductance value of the 8th inductance, the capacitance of the 5th capacitance, the capacitance of the 6th capacitance, the described 7th
The resistance value of the capacitance of capacitance and the first resistor, so that stability enhancing circuit can be according to low noise amplification
The variation of circuit and again so that the low noise amplifier circuit stablize.
In one possible example, referring to Fig. 5, Fig. 5 is that an embodiment of the present invention provides a kind of second protection circuits
Structural schematic diagram.As shown in figure 5, circuit further includes protection circuit, protection circuit is used for when antenna is by predeterminated voltage as electricity
Road provides protection, and protection circuit includes：5th resistance R2, the 6th resistance R3, the 7th resistance R4, the 8th resistance R5, the 9th resistance
R6, the tenth resistance R7, the first voltage-stabiliser tube D1, the second voltage-stabiliser tube D2, third voltage-stabiliser tube D3, the 4th voltage-stabiliser tube D4, the 5th voltage-stabiliser tube
D5, silicon-controlled D6, the tenth capacitance C8, the 11st capacitance C9, the 12nd capacitance C10, the 9th inductance L9, the tenth inductance L10, the tenth
One inductance L11, the 12nd inductance L12, the 13rd inductance L13, the 14th inductance L14, bandstop filter 508, electrostatic detection list
Member 511, vent unit 510, MCU and transistor T；
The first end of second resistance R2 is connected by bandstop filter 508 with the output end of antenna 501, second resistance R2
Second end be connected with the first end of the anode D1 of the first voltage-stabiliser tube, 3rd resistor R3, the minus earth of the first voltage-stabiliser tube D1,
The second end of 3rd resistor R3 is connected with the anode of the second voltage-stabiliser tube D2, the minus earth of the second voltage-stabiliser tube D2, the 4th resistance
The first end of R4 is connected by bandstop filter 508 with the output end of antenna 501, the second end of the 4th resistance R4 and the 8th electricity
The anode of the first end, the 4th voltage-stabiliser tube D4 that hinder R5 is connected, the minus earth of the 4th voltage-stabiliser tube D4, and the second of the 5th resistance R5
End is connected with the anode of third voltage-stabiliser tube D3, the minus earth of third voltage-stabiliser tube D3, the first end and day of the 13rd inductance L13
The output end of line 501 is connected, and the second end of the 13rd inductance L13 is connected with the anode of the 5th voltage-stabiliser tube D5, the 5th voltage stabilizing
The cathode of pipe D5 is connected with the first end of the 6th resistance R6, the second end of the 6th resistance R6 and the first end of the 9th inductance L9,
The first end of 7th resistance R7 is connected, the second end ground connection of the 7th resistance R7, second end and the 8th capacitance of the 9th inductance L9
The first end of C8, the first end of the 9th capacitance C9, the first end of the tenth inductance L10, the grid of transistor T are connected, the 8th electricity
Hold the second end ground connection of C8, the second end of the 9th capacitance C9 is connected with the second end of the tenth inductance L10, MCU, transistor T's
Drain electrode is connected with the second end of the 14th inductance L14, and the first end of the 14th inductance L14 is connected with the output end of power supply 509
It connecing, the source electrode of transistor T is connected with the control pole of silicon-controlled D6, and the second of the anode of silicon-controlled D6 and the 12nd inductance L12
End is connected, and the first end of the 12nd inductance L12 is connected with switching circuit 503, and the minus earth of silicon-controlled D6, MCU passes through
Bandstop filter 508 and electrostatic detection unit 511 are connected with the output end of the first filter circuit 502, and MCU passes through the tenth capacitance
The filter circuit of C10 and the 11st inductance L11 compositions is connected with switching circuit 503, and MCU passes through electrostatic detection unit 511, band
Hinder the output of filter 508 and the output end of switching circuit 503, the output end of low noise amplifier circuit 504, mixting circuit 505
End, programmable logic amplifying circuit 506 output end be connected, the first end of vent unit 510 is connected with signal processing circuit
It connects, the second end ground connection of vent unit 510, MCU is connected with vent unit 510.
The operation principle of above-mentioned protection circuit is that, when signal receiving circuit is encountered higher than predeterminated voltage, predeterminated voltage is
The maximum voltage that the signal receiving circuit can be born, the voltage are determined by the circuit of signal receiving circuit itself, protect circuit
In the blanking voltage of D1 be less than the predeterminated voltage, the band of bandstop filter hinders the signal that can be handled for signal processing circuit
Frequency range is arranged this bandstop filter and is mainly used for preventing from the transmitting of signal processing circuit or receive signal to pass through from the branch, from
And the performance of signal processing circuit is reduced, when the voltage of antenna output end is higher than predeterminated voltage in a processing circuit, which makes
D1, D2, D3, D4 and D5 conducting make protection to releasing to the voltage to signal processing circuit, while pass through by
D1, D2 and D3, D4 are arranged in parallel, and release effect of the circuit to the electric current can be promoted when circuit is by heavy current, is provided
The first order is protected, and avoids the power on R2, R3, R4, R5 excessive, and high exoergic phenomenon occurs, to damage protection circuit.
Voltage is failed to release completely in view of possible aforementioned leadage circuit, has portion of electrical current to puncture filter circuit, arrives
Up to switching circuit, the second level is set herein and is protected, after D5 conductings, MCU is detected at the grid of transistor there are when voltage, directly
It connects control switching circuit to be fully disconnected, be fully disconnected to be disconnected with all transmitting path and receiving path, while voltage is logical
After crossing the filter network that L9 and C8 is constituted, bias voltage is provided for transistor T so that the conducting of transistor T, to transistor
Source electrode provides control voltage for silicon-controlled D6 and makes controlled silicon conducting, releases to electric current, to realize that the second level is protected.
The also controllable electrostatic detection units of MCU are detected the electrostatic in signal processing circuit, reach pre- in the electrostatic
If when voltage, the predeterminated voltage be electrostatic can discharge voltage, control vent unit the electrostatic in signal processing circuit is let out
It puts, to reach the protection to signal processing circuit.
MCU can also be detected the charge in the environment residing for internet-of-things terminal by charge detection sensor, and inspection is worked as
When measuring intensive charge, it can determine whether out that the region may have highfield or will will appear thunder-strike phenomenon, then directly control out
Powered-down road is fully disconnected, and can avoid the presence damage to the component after switching circuit after strong voltage enters circuit to a certain degree
Bad possibility, to achieve the purpose that protect to internet-of-things terminal.
A kind of chip is provided in another embodiment of the present invention, which includes signal processing as described in Figure 1 electricity
Road, power circuit and processor.Referring to Fig. 6, Fig. 6 is that an embodiment of the present invention provides a kind of possible structural representations of chip
Figure.As shown in fig. 6, chip includes：Power circuit 601, processor 602 and rf signal reception circuit 603.Above-mentioned power circuit
601 its major function to provide power supply to the chip, above-mentioned processor 602 for example can be for example can be central processing unit
(Central Processing Unit, CPU), general processor, digital signal processor (Digital Signal
Processor, DSP), application-specific integrated circuit (Application-Specific Integrated Circuit, ASIC) is existing
Field programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic device, hardware
Component or its arbitrary combination, rf signal reception circuit 603 are the either circuit described in above-described embodiment.
Another embodiment of the embodiment of the present invention provides a kind of circuit board, which includes modem, base band
The chip provided in signal processor and above-described embodiment.Referring to Fig. 7, Fig. 7 is that an embodiment of the present invention provides circuit boards
A kind of possible structural schematic diagram.As shown in fig. 7, the circuit board includes：Modem 701, signal processor 702, chip
703 and bus 704.Modem 701, signal processor 702, chip 703 are connected by bus 704.Modem 701
Mainly for the treatment of wireless signal by treated the baseband signal of chip 703, signal processor 702 is mainly for the treatment of process
Signal after the demodulation of modem 701, chip 703 are mainly used for being handled radio frequency signal to obtain baseband signal.
A kind of internet-of-things terminal is provided in another embodiment of the present invention, the internet-of-things terminal include foregoing circuit plate and
Shell.
Above specific implementation mode has carried out into one the purpose, technical solution and advantageous effect of the embodiment of the present invention
Step is described in detail, it should be understood that these are only the specific implementation mode of the embodiment of the present invention, is not used to limit this
The protection domain of inventive embodiments, all any modifications on the basis of the technical solution of the embodiment of the present invention, made are equal
Replace, improve etc., it should all be included within the protection domain of the embodiment of the present invention.
Claims (10)
1. a kind of signal processing circuit, which is characterized in that be applied to internet-of-things terminal, the circuit includes：Antenna, the first filtering
Circuit, switching circuit, low noise amplifier circuit, mixting circuit, programmable logic amplifying circuit and ADC；
The output end of the antenna is connected with the input terminal of first filter circuit, the output end of first filter circuit
It is connected with the input terminal of the switching circuit, the input terminal of the output end of the switching circuit and the low noise amplifier circuit
It is connected, the output end of the low noise amplifier circuit is connected with the input terminal of the mixting circuit, the mixting circuit
Output end is connected with the input terminal of the programmable logic amplifying circuit, the output end of the programmable logic amplifying circuit with
The input terminal of the ADC is connected；
The antenna includes radiator, feed circuit, control circuit, the first protection circuit, match circuit and the second filtered electrical
Road；The feed end of the radiator is connected with the input terminal of the first end of the feed circuit, the match circuit, the feedback
The second end of circuit is connected with the control terminal of the control circuit, and the second end of the match circuit is filtered with described second
The input terminal of circuit is connected, and the output end of second filter circuit is connected with the output end of the antenna, and described first
It protects circuit to be used for when the feed circuit is in preset state, single ended voltage is provided for the radiator；
The low noise amplifier circuit includes stability enhancing circuit, stability enhancing circuit with the low noise amplification
The output end of circuit is connected and the stability for enhancing the low noise amplifier circuit.
2. circuit according to claim 1, which is characterized in that the first protection circuit includes the first MCU and driving source,
Whether the dbjective state that the first MCU is used to detect the feed circuit is in preset state, if the dbjective state is in
Preset state then sends control instruction to the driving source；The driving source is used to receive the control instruction, and according to described
Control instruction generates pumping signal.
3. circuit according to claim 1 or 2, which is characterized in that first filter circuit includes：First filter
Part, second filter part, third filtering device, the 4th filtering device, the 5th filtering device, the 6th filtering device, the 7th filtering
Device, the 8th filtering device, the 9th filtering device and the tenth filtering device；
The first of the first end of the first filter part and the first end of the second filter part, the 5th filtering device
End is connected, the first end of the second end of the first filter part and the 7th filtering device, the 9th filtering device
First end be connected, the first end of the second end of the second filter part and the third filtering device, the 4th filter
The first end of wave device, the first end of the 6th filtering device are connected, the second end of the third filtering device with it is described
The second end of 4th filtering device, the second end of the 8th filtering device, the second end of the tenth filtering device are connected,
The second end of 6th filtering device and the second end of the 5th filtering device, the second end of the 7th filtering device,
The first end of 8th filtering device is connected, and the of the second end of the 9th filtering device and the tenth filtering device
One end is connected, the first end of the input terminal of first filter circuit and the first filter part, the third filter
The second end of part is connected, the first end and second end phase of the output end of first filter circuit and the tenth filtering device
Connection.
4. circuit according to claim 1 or 2, which is characterized in that the low noise amplifier circuit includes：First crystal
Pipe, second transistor, third transistor, the first capacitance, the second capacitance, third capacitance, the 4th capacitance, stability enhancing circuit,
First inductance, the second inductance, third inductance, the 4th inductance, the 5th inductance, the 6th inductance, the first power supply, second source, third
Power supply, the 4th power supply and the 5th power supply；
The input terminal of the low noise amplifier circuit is connected with the input terminal of the output end of first power supply, first inductance
It connects, the output end of first inductance is connected with the grid of the input terminal of second capacitance, the first transistor, described
The output end of second capacitance is grounded, and the source electrode of the first transistor is connected with the input terminal of second inductance, and described the
The output end of two inductance is grounded, and the drain electrode of the first transistor is connected with the source electrode of the second transistor, and described second
The grid of transistor is connected with the input terminal of the output end of the 4th inductance, the third capacitance, the third capacitance
Output end is grounded, and the input terminal of the 4th inductance is connected with the output end of the second source, the second transistor
Drain electrode be connected with the input terminal of the output end of the third inductance, first capacitance, the input terminal of the third inductance and
The output end of the third power supply is connected, and the output end of first capacitance is connected with the source electrode of the third transistor,
The grid of the third transistor is connected with the output end of the 5th inductance, the input terminal of the 5th inductance and described the
The output end of four power supplys is connected, output end, the 4th capacitance of the drain electrode and the 6th inductance of the third transistor
Input terminal be connected, the input terminal of the 6th inductance is connected with the output end of the 5th power supply, the 4th capacitance
Output end and the stability enhance the input terminal of circuit and be connected, the output end of the stability enhancing circuit with it is described low
The output end of noise amplifier circuit is connected.
5. circuit according to claim 1, which is characterized in that the switching circuit includes：8 receiving circuit ports, institute
It states 8 receiving circuit ports and is separately connected 4 groups of receiving circuits, every group of receiving circuit connects 2 receiving ports, and described 2 connect
Receiving end mouth is used to receive the electromagnetic wave of different frequency.
6. circuit according to claim 1, which is characterized in that the stability enhancing circuit includes the 7th inductance, the 8th
Inductance, the 5th capacitance, the 6th capacitance, the 7th capacitance, first resistor and the 2nd MCU；
The of the second end of 7th inductance and the 5th capacitance, the first end of the 6th capacitance, the 8th inductance
One end is connected, the second end of the 5th capacitance and the second end of the 6th capacitance, the second end of the 7th capacitance, institute
The second end for stating first resistor is connected, the second end of the 8th inductance and the first end of the 7th capacitance, described first
The first end of resistance is connected, the first end, the second end of the 5th capacitance, institute of the 2nd MCU and the 7th inductance
The second end of the first end, the first resistor of stating first resistor is connected and the 2nd MCU is electric with the described 7th respectively
Sense, the 8th inductance, the 5th capacitance, the 6th capacitance, the 7th capacitance, the first resistor are connected, institute
State inductance values, the inductance value of eightth inductance, fiveth electricity of the 2nd MCU for detecting and adjusting the 7th inductance
The resistance value of the capacitance of appearance, the capacitance of the 6th capacitance, the capacitance and the first resistor of the 7th capacitance.
7. according to claim 1-6 any one of them circuits, which is characterized in that the circuit further includes the second protection circuit,
The second protection circuit for the circuit when the antenna is by predeterminated voltage for providing protection.
8. a kind of chip, which is characterized in that the chip includes described in processor, power circuit and claim any one of 1-7
Signal processing circuit.
9. a kind of circuit board, which is characterized in that the circuit board includes modem, signal processor and claim 8 institute
The chip stated.
10. a kind of internet-of-things terminal, which is characterized in that the internet-of-things terminal includes the circuit described in shell and claim 9
Plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810292572.XA CN108599790A (en) | 2018-03-30 | 2018-03-30 | Internet of Things radio circuit and terminal based on plasma antenna and stable type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810292572.XA CN108599790A (en) | 2018-03-30 | 2018-03-30 | Internet of Things radio circuit and terminal based on plasma antenna and stable type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108599790A true CN108599790A (en) | 2018-09-28 |
Family
ID=63624342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810292572.XA Pending CN108599790A (en) | 2018-03-30 | 2018-03-30 | Internet of Things radio circuit and terminal based on plasma antenna and stable type |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108599790A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101834567A (en) * | 2010-06-03 | 2010-09-15 | 中国人民解放军国防科学技术大学 | Broadband gain adjustable low-noise amplifier |
| CN104012006A (en) * | 2011-11-03 | 2014-08-27 | 华为技术有限公司 | Compensation apparatus for receiver asymmetric wide passband frequency respsonse with 25% duty cycle passive mixer |
| CN105932404A (en) * | 2016-04-21 | 2016-09-07 | 上海海事大学 | Plasma flexible antenna system |
| WO2017073509A1 (en) * | 2015-10-26 | 2017-05-04 | 株式会社村田製作所 | Switch module |
-
2018
- 2018-03-30 CN CN201810292572.XA patent/CN108599790A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101834567A (en) * | 2010-06-03 | 2010-09-15 | 中国人民解放军国防科学技术大学 | Broadband gain adjustable low-noise amplifier |
| CN104012006A (en) * | 2011-11-03 | 2014-08-27 | 华为技术有限公司 | Compensation apparatus for receiver asymmetric wide passband frequency respsonse with 25% duty cycle passive mixer |
| WO2017073509A1 (en) * | 2015-10-26 | 2017-05-04 | 株式会社村田製作所 | Switch module |
| CN105932404A (en) * | 2016-04-21 | 2016-09-07 | 上海海事大学 | Plasma flexible antenna system |
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Application publication date: 20180928 |