CN208674343U - A kind of antenna feeding circuit and antenna - Google Patents
A kind of antenna feeding circuit and antenna Download PDFInfo
- Publication number
- CN208674343U CN208674343U CN201821406015.8U CN201821406015U CN208674343U CN 208674343 U CN208674343 U CN 208674343U CN 201821406015 U CN201821406015 U CN 201821406015U CN 208674343 U CN208674343 U CN 208674343U
- Authority
- CN
- China
- Prior art keywords
- antenna
- module
- resistance
- power
- power supply
- 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
Abstract
A kind of antenna feeding circuit comprising: power module, one-chip computer module and at least one include the power supply circuit module of first control unit, the second control unit, switch unit and the first protection location.The power supply enable signal that one-chip computer module output is received by the way that at least one power supply circuit module is arranged carries out control and is switched on or switched off power module to antenna power supply, disconnecting when power module is powered to antenna is passive antenna, power on when module is powered to antenna for active antenna, it can be with compatible passive and active antenna to meet the needs of different occasions, and module is being powered on to when antenna power supply, the level detection signal of one-chip computer module monitoring aerial short-circuit condition output can also be received by power supply circuit module, it can be in antenna short circuit, power supply circuit module can cut off the power module to antenna power, to protect antenna power without damage.
Description
Technical field
The utility model belongs to antenna power supply technique field more particularly to a kind of antenna feeding circuit and antenna.
Background technique
Currently, antenna can be divided into active antenna and passive antenna, passive antenna only includes receiving antenna module, can satisfy
General performance requirement；And active antenna has been internally integrated receiving antenna module, low noise amplification module, power supply module,
It is applicable to the higher occasion of performance requirement；Although different occasion demands can be directed to select different types of antenna with
Unnecessary cost is saved, still, due to certain special occasion demands, so that antenna is long-term to pass through in outdoor application, still
Exposed to the sun and rain by wind and will lead to the exocuticle breakage of antenna, be easy to cause antenna short circuit phenomenon, for passive antenna, short circuit can
Signal quality can be will affect, and for active antenna, short circuit may damage equipment.
Therefore, antenna feeding circuit present in traditional technical solution, which exists, can not pass through compatible passive and active antenna
Antenna short circuit state is monitored come the problem of protecting antenna.
Utility model content
The utility model provides a kind of antenna feeding circuit, it is intended to solve not passing through present in traditional technical solution
Compatible passive and active antenna are monitored antenna short circuit state come the problem of protecting antenna.
The utility model is realized in this way a kind of antenna feeding circuit, comprising:
It is configured as the power module of power supply；
It is configured as output and powers enabled level signal and detection antenna short circuit state with the list of output level detection signal
Piece machine module；And
At least one connect with the one-chip computer module, the antenna and the power module, be configured as connect or
Disconnect the power supply circuit module of the power module power supply；Wherein, the power supply circuit module includes:
It is connect with first power end at the short-circuit detecting end of the one-chip computer module and the power module, is configured as root
The first control unit of the first level controling signal is exported according to the level detection signal；
With the first electricity of power enable end, the first control unit and the power module of the one-chip computer module
Source connection is configured as according to power enabled level signal and first level controling signal output second electrical level control
Second control unit of signal processed；
It connect, is configured as with second control unit, the second source end of the power module and the antenna
The switch unit that the open or closed power module of signal is powered to the antenna is controlled according to the second electrical level；And
Be connected between the antenna and the short-circuit detecting end of the one-chip computer module, be configured as preventing electric current flow backward to
First protection location at the short-circuit detecting end of the one-chip computer module.
Each power supply circuit mould makes with multiple power supplies of the one-chip computer module respectively in one of the embodiments,
Can multiple short-circuit detecting ends of end and the one-chip computer module connect one to one, be individually configured for the antenna described in multichannel into
Row is independently-powered.
In one of the embodiments, the first control unit include: first resistor, second resistance, 3rd resistor with
And first switch tube, the first end of the first end of the first resistor and the 3rd resistor with the power module first
The first end of power end connection, the second end of the first resistor and the second resistance is connect altogether as the first control unit
Short-circuit signal input terminal and connect with the short-circuit detecting end of the one-chip computer module, the second end of the second resistance with it is described
The control terminal of first switch tube connects, the output end ground connection of the first switch tube, the second end of the 3rd resistor with it is described
The input terminal of first switch tube connects the control signal output as the first control unit altogether.
Second control unit includes: the 4th resistance, the 5th resistance, the 6th resistance, in one of the embodiments,
Seven resistance, second switch and third switching tube；Control of the first end of 4th resistance as second control unit
Signal input part processed and control signal output with the first control unit, the second end of the 4th resistance and described the
The control terminal of two switching tubes connect altogether as second control unit the enabled input terminal of power supply and with the one-chip computer module
The connection of power supply enable end, the output end ground connection of the second switch, the input terminal of the second switch, the 5th resistance
First end and the first end of the 6th resistance connect altogether, the first of the second end of the 5th resistance and the power module
Power end connection, second end, the first end of the 7th resistance and the control of the third switching tube of the 6th resistance
End connects altogether, and the second end of the 7th resistance and the output end of the third switching tube are connected to ground altogether, the third switching tube
Input terminal as second control unit control signal output and connect with the switch unit.
The switch unit includes: the 8th resistance and the 4th switching tube, the 8th resistance in one of the embodiments,
First end and the control terminal of the switching tube connect the control signal input as the switch unit, the 8th resistance altogether
Second end and the input terminal of the 4th switching tube connect the voltage input end as the switch unit altogether, the 4th switch
The output end of pipe as the switch unit voltage output end and connect with the antenna.
First protection location includes first diode in one of the embodiments, the yin of the first diode
Pole is connect with the antenna, and the anode of the first diode is connect with the short-circuit detecting end of the one-chip computer module.
The power supply circuit module in one of the embodiments, further include: be connected to the second electricity of the power module
Between source and the voltage input end of the switch unit, it is configured as the filter unit of filtering processing.
The filter unit includes the first magnetic bead in one of the embodiments,.
The power supply circuit module in one of the embodiments, further include: the voltage for being connected to the switch unit is defeated
Between outlet and the antenna, for protecting the second protection location of the antenna.
In addition, a kind of antenna is additionally provided, including above-mentioned antenna feeding circuit.
Above-mentioned antenna feeding circuit receives the confession of one-chip computer module output by the way that at least one power supply circuit module is arranged
Electric enable signal carries out control and is switched on or switched off power module to antenna power supply, and it is passive for disconnecting when power module is powered to antenna
Antenna powers on for active antenna when module is powered to antenna, can be with compatible passive and active antenna to meet different occasions
Demand；In addition, can also pass through power supply circuit module powering on module to when antenna power supply and receive one-chip computer module prison
The level detection signal of observation line short-circuit condition output, can be in antenna short circuit, and power supply circuit module can cut off the power mould
Block is powered to antenna, to protect antenna power without damage.
Detailed description of the invention
Fig. 1 is the module diagram for the antenna feeding circuit that an embodiment of the present invention provides；
Fig. 2 is the module diagram for the antenna feeding circuit that another embodiment of the utility model provides；
Fig. 3 is the circuit diagram for the antenna feeding circuit that an embodiment of the present invention provides；
Fig. 4 is the circuit diagram for the antenna feeding circuit that another embodiment of the utility model provides.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
Fig. 1 shows the antenna feeding circuit module diagram of the utility model preferred embodiment offer, for the ease of saying
Bright, only the parts related to this embodiment are shown, and details are as follows:
With reference to Fig. 1, antenna feeding circuit include: power module 30, one-chip computer module 20 and at least one include
One control unit 101, the second control unit 102, the power supply circuit module 10 of switch unit 103 and the first protection location 104.
Wherein, power module 30 is configured as powering；One-chip computer module 20 is configured as the enabled level signal of output power supply
Signal is detected with output level with detection antenna short circuit state；Each power supply circuit module 10 and one-chip computer module 20, antenna with
And power module 30 connects, and is configured as being switched on or switched off the power supply of power module 30.Specifically, first control unit 101 and list
The short-circuit detecting end ANT_STA of piece machine module 20 is connected with the first power end of power module 30, is configured as being examined according to level
It surveys signal and exports the first level controling signal；The power supply enable end ANT_ENA of second control unit 102 and one-chip computer module 20,
The connection of first power end of first control unit 101 and power module 30, be configured as according to power enabled level signal and
First level controling signal exports second electrical level and controls signal；Switch unit 103 and the second control unit 102, power module 30
Second source end and antenna connection, be configured as controlling the open or closed power module 30 of signal to day according to second electrical level
Line power supply；First protection location 104 is connected between antenna and the short-circuit detecting end ANT_STA of one-chip computer module 20, is configured
To prevent electric current from flowing backward to the short-circuit detecting end of one-chip computer module 20.
In one of the embodiments, refer to Fig. 3, each power supply circuit mould respectively with multiple power supplies of one-chip computer module 20
Multiple short-circuit detecting end ANT_STA of enable end ANT_ENA and one-chip computer module 20 connect one to one, and it is right for being individually configured
Multi-path antenna carries out independently-powered.
As above-mentioned, the enabled letter of power supply that one-chip computer module 20 exports is received by the way that at least one power supply circuit module 10 is arranged
Number carry out control and be switched on or switched off power module 30 to power to antenna, disconnecting when power module 30 is powered to antenna is passive day
Line powers on for active antenna when module 30 is powered to antenna, can be with compatible passive and active antenna to meet different occasions
Demand.Module 30 is being powered on to when antenna power supply, can also be passed through power supply circuit module 10 and be received one-chip computer module 20
The level detection signal of monitoring aerial short-circuit condition output, can be in antenna short circuit, switch that power supply circuit module 10 includes
Unit 103 is not turned on to stop power module 30 to antenna and power, to protect antenna power without damage.
In one of the embodiments, refer to Fig. 2, first control unit 101 include: first resistor R1, second resistance R2,
The first end of 3rd resistor R3 and first switch tube Q1, first resistor R1 and the first end of 3rd resistor R3 are and power module
30 the first power end connection, the second end of first resistor R1 and the first end of second resistance R2 are connect altogether as first control unit
101 short-circuit signal input terminal is simultaneously connect, the second end of second resistance R2 with the short-circuit detecting end ANT_STA of one-chip computer module 20
It is connect with the control terminal of first switch tube Q1, the output end ground connection of first switch tube Q1, the second end of 3rd resistor R3 and first
The input terminal of switching tube Q1 connects the control signal output as first control unit 101 altogether.In the present embodiment, first switch
Pipe Q1 can be realized that base stage, collector and the emitter of NPN type triode are respectively first switch tube by NPN type triode
Control terminal, input terminal and the output end of Q1.In other examples, first switch tube Q1 can also be by PNP type triode reality
It is existing.
In one of the embodiments, refer to Fig. 2, the second control unit 102 include: the 4th resistance R4, the 5th resistance R5,
6th resistance R6, the 7th resistance R7, second switch Q2 and third switching tube Q3；The first end of 4th resistance R4 is as second
The control signal input of control unit 102 and control signal output with first control unit 101, the of the 4th resistance R4
The control terminal of two ends and second switch Q2 connect altogether as the power supply of the second control unit 102 enable input terminal and with single-chip microcontroller mould
The power supply enable end ANT_ENA connection of block 20, the output end ground connection of second switch Q2, the input terminal of second switch Q2, the
The first end of five resistance R5 and the first end of the 6th resistance R6 connect altogether, and the of the second end of the 5th resistance R5 and power module 30
The control terminal of the connection of one power end, the second end of the 6th resistance R6, the first end of the 7th resistance R7 and third switching tube Q3 is total
It connects, the second end of the 7th resistance R7 and the output end of third switching tube Q3 are connected to ground, the input terminal conduct of third switching tube Q3 altogether
The control signal output of second control unit 102 is simultaneously connect with switch unit 103.In the present embodiment, second switch Q2
It can be realized by NPN type triode, base stage, collector and the emitter of NPN type triode are respectively second switch Q2
Control terminal, input terminal and output end.Third switching tube Q3 can be realized that the base stage of NPN type triode collects by NPN type triode
Electrode and emitter are respectively control terminal, input terminal and the output end of third switching tube Q3.In other examples, second
Switching tube Q2 and third switching tube Q3 can also be realized by PNP type triode.
Fig. 2 is referred in one of the embodiments, switch unit 103 includes: the 8th resistance R8 and the 4th switching tube Q4,
The first end of 8th resistance R8 and the control terminal of switching tube connect the control signal input as switch unit 103, the 8th electricity altogether
The input terminal of the second end and the 4th switching tube Q4 that hinder R8 connects the voltage input end as switch unit 103, the 4th switching tube altogether
The output end of Q4 as switch unit 103 voltage output end and connect with antenna.In the present embodiment, the 4th switching tube Q4 can
To be realized by PMOS tube, the grid of PMOS tube, source electrode and drain electrode be respectively the control terminal of the 4th switching tube Q4, input terminal and
Output end.In other examples, the 4th switching tube Q4 can also be realized by NMOS tube.When the antenna feeding circuit includes more
A power supply circuit module 10 needs multiple 4th switching tube Q4, can be used and be integrated with then including multiple switch unit 103
The switch chip of multiple switch pipe realizes, such as: as shown in Figures 2 and 4, when the antenna feeding circuit includes two power supply circuits
Module 10 needs two the 4th switching tube Q4, is integrated with the switch chips of two switching tubes then can be used to realize
It is realized using the switch chip of model IRF7304.
Fig. 2 is referred in one of the embodiments, and the first protection location 104 includes first diode D1, first diode
The cathode of D1 is connect with antenna, and the anode of first diode D1 is connect with the short-circuit detecting end ANT_STA of one-chip computer module 20.Example
Such as, when the voltage of antenna power end is 12V, make one-chip computer module 20 after the level conversion of the first protection location 104
The voltage of short-circuit detecting end ANT_STA is 3.3V.
Fig. 2, power supply circuit module 10 are referred in one of the embodiments, further include: are connected to the of power module 30
Between two power ends and the voltage input end of switch unit 103, it is configured as the filter unit 106 of filtering processing.Wherein one
In a embodiment, filter unit 106 includes the first magnetic bead FB1.In other embodiments, filter unit 106 can be inductor.
Fig. 2, power supply circuit module 10 further include: be connected to the electricity of switch unit 103 are referred in one of the embodiments,
It presses between output end and antenna, for protecting the second protection location 105 of antenna.In the present embodiment, the second protection location 105
It can be realized by fuse or fusible link FUSE1.
Fig. 4, the power supply circuit module 10 further include: be connected to switch unit 103 are referred in one of the embodiments,
Between voltage output end and the second protection location, be configured as marker antenna whether Duan Lu indicating module 107.In the present embodiment
In, indicating module 107 includes the first LED light LED1 and the tenth resistance R10, and it is single that the anode of the first LED light LED1 is connected to switch
Between the voltage output end and the second protection location of member 103, the cathode of the first LED light LED1 and the first end of the tenth resistance R10
Connection, the second end ground connection of the tenth resistance R10.
The working principle of above-mentioned antenna feeding circuit is illustrated by taking Fig. 3 as an example below, details are as follows:
Enabled level signal is exported by the power supply enable end ANT_ENA of one-chip computer module 20, power supply circuit module 10 connects
It receives the power supply enable signal that one-chip computer module 20 exports and control and be switched on or switched off power module 30 to antenna power supply.
When it is high level that the power supply enable end ANT_ENA of one-chip computer module 20, which exports enabled level signal, second switch
Pipe Q2 conducting, since the emitter of second switch Q2 is grounded, so that the of the first end of the 5th resistance R5 and the 6th resistance R6
The total junction voltage of one end is not turned on close to 0V so as to cause third switching tube Q3, so control switch unit 103 include
Four switching tube Q4 are disconnected, and so that power module 30 is not powered to antenna, be can be used as passive antenna at this time.
When it is low level that the power supply enable end ANT_ENA of one-chip computer module 20, which exports enabled level signal, second switch
Pipe Q2 is not turned on, but since the second end of the 5th resistance R5 is connect with the second source end of power module 30, power module 30 to
The voltage of second control unit 102 output is after the 5th resistance R5 and the 6th resistance R6 partial pressure, so that third switching tube Q3 is led
It is logical, and then the 4th switching tube Q4 conducting that control switch unit 103 includes, the second source end of power module 30 is led to
It crosses the 4th switching tube Q4 to power to antenna, can be used as active antenna at this time.
When the second source end of power module 30 powers to antenna, the short-circuit detecting end ANT_STA of one-chip computer module 20
The short-circuit condition of monitoring aerial power end, when antenna works normally, antenna electric source is high level, at this time one-chip computer module 20
The level detection signal that detects of short-circuit detecting end ANT_STA be also high level, and work as the short-circuit detecting of one-chip computer module 20
When the level detection signal that end ANT_STA is detected also is low level, illustrate that short trouble occurs for antenna, to make first resistor
The total junction voltage of the first end of the second end and second resistance R2 of R1 is 0V, and then is not turned on first switch tube Q1, therefore
The voltage of the first power end output of power module 30 makes second switch after 3rd resistor R3 and the 4th resistance R4 partial pressure
Q2 conducting, since the emitter of second switch Q2 is grounded, so that the first of the first end of the 5th resistance R5 and the 6th resistance R6
End total junction voltage close to 0V, be not turned on so as to cause third switching tube Q3, so control switch unit 103 include the 4th
Switching tube Q4 is disconnected to stop source module to antenna and power, to protect antenna power without damage.
In addition, a kind of antenna is additionally provided, including above-mentioned antenna feeding circuit.
The utility model has the beneficial effects that
(1) the power supply enable signal that the reception one-chip computer module output of at least one power supply circuit module is arranged carries out control and connects
On-off switch power supply module to antenna power, disconnect power module to antenna power when be passive antenna, power on module to
It is active antenna when antenna is powered, it can be with compatible passive and active antenna to meet the needs of different occasions.
(2) module is being powered on to when antenna power supply, can also pass through power supply circuit module and receive one-chip computer module prison
The level detection signal of observation line short-circuit condition output, can be in antenna short circuit, and power supply circuit module can cut off the power mould
Block is powered to antenna, to protect power supply without damage.
(3) multiple power supply circuit modules can combine superposition, can carry out independent short circuit to multi-path antenna respectively and monitor,
To protect the safety of power supply.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (10)
1. a kind of antenna feeding circuit, which is characterized in that the antenna feeding circuit includes:
It is configured as the power module of power supply；
It is configured as output and powers enabled level signal and detection antenna short circuit state with the single-chip microcontroller of output level detection signal
Module；And
At least one connect with the one-chip computer module, the antenna and the power module, is configured as being switched on or switched off
The power supply circuit module of the power module power supply；
Wherein, the power supply circuit module includes:
It connect, is configured as according to institute with first power end at the short-circuit detecting end of the one-chip computer module and the power module
State the first control unit that level detection signal exports the first level controling signal；
With the first power end of power enable end, the first control unit and the power module of the one-chip computer module
Connection is configured as according to enabled level signal and first level controling signal output second electrical level control letter of powering
Number the second control unit；
It is connect with second control unit, the second source end of the power module and the antenna, is configured as basis
The switch unit that the second electrical level control open or closed power module of signal is powered to the antenna；And
It is connected between the antenna and the short-circuit detecting end of the one-chip computer module, is configured as preventing electric current from flowing backward to described
First protection location at the short-circuit detecting end of one-chip computer module.
2. antenna feeding circuit as described in claim 1, which is characterized in that each power supply circuit mould respectively with the list
Multiple power supply enable ends of piece machine module and multiple short-circuit detecting ends of the one-chip computer module connect one to one, and are matched respectively
It is independently-powered to be set to the progress of the antenna described in multichannel.
3. antenna feeding circuit as described in claim 1, which is characterized in that the first control unit include: first resistor,
The first end of second resistance, 3rd resistor and first switch tube, the first end of the first resistor and the 3rd resistor is equal
It is connect with the first power end of the power module, the first end of the second end of the first resistor and the second resistance connects altogether
As the first control unit short-circuit signal input terminal and connect with the short-circuit detecting end of the one-chip computer module, described
The second end of two resistance is connect with the control terminal of the first switch tube, the output end of first switch tube ground connection, and described the
The input terminal of the second end of three resistance and the first switch tube connects the control signal output as the first control unit altogether
End.
4. antenna feeding circuit as described in claim 1, which is characterized in that second control unit include: the 4th resistance,
5th resistance, the 6th resistance, the 7th resistance, second switch and third switching tube；
The first end of 4th resistance as second control unit control signal input and with it is described first control
The control terminal of the control signal output of unit, the second end and the second switch of the 4th resistance is connect altogether as described
The enabled input terminal of the power supply of second control unit is simultaneously connect, the second switch with the power supply enable end of the one-chip computer module
Output end ground connection, the of the input terminal of the second switch, the first end of the 5th resistance and the 6th resistance
One end connects altogether, and the second end of the 5th resistance is connect with the first power end of the power module, and the of the 6th resistance
The control terminal at two ends, the first end of the 7th resistance and the third switching tube connects altogether, the second end of the 7th resistance
It is connected to ground altogether with the output end of the third switching tube, the input terminal of the third switching tube is as second control unit
Control signal output is simultaneously connect with the switch unit.
5. antenna feeding circuit as described in claim 1, which is characterized in that the switch unit includes: the 8th resistance and
Four switching tubes, the first end of the 8th resistance and the control terminal of the switching tube connect the control letter as the switch unit altogether
Number input terminal, the second end of the 8th resistance and the input terminal of the 4th switching tube connect the electricity as the switch unit altogether
Press input terminal, the output end of the 4th switching tube as the switch unit voltage output end and connect with the antenna.
6. antenna feeding circuit as described in claim 1, which is characterized in that first protection location includes the one or two pole
Pipe, the cathode of the first diode are connect with the antenna, the anode of the first diode and the one-chip computer module
The connection of short-circuit detecting end.
7. antenna feeding circuit as described in claim 1, which is characterized in that the power supply circuit module further include: be connected to
Between the second source end of the power module and the voltage input end of the switch unit, it is configured as the filtering of filtering processing
Unit.
8. antenna feeding circuit as described in claim 1, which is characterized in that the filter unit includes the first magnetic bead.
9. antenna feeding circuit as described in claim 1, which is characterized in that the power supply circuit module further include: be connected to
Between the voltage output end of the switch unit and the antenna, for protecting the second protection location of the antenna.
10. a kind of antenna, including the described in any item antenna feeding circuits of claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821406015.8U CN208674343U (en) | 2018-08-29 | 2018-08-29 | A kind of antenna feeding circuit and antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821406015.8U CN208674343U (en) | 2018-08-29 | 2018-08-29 | A kind of antenna feeding circuit and antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208674343U true CN208674343U (en) | 2019-03-29 |
Family
ID=65840490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821406015.8U Active CN208674343U (en) | 2018-08-29 | 2018-08-29 | A kind of antenna feeding circuit and antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208674343U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109935950A (en) * | 2018-08-29 | 2019-06-25 | 浙江科比特科技有限公司 | A kind of antenna feeding circuit and antenna |
| CN112367127A (en) * | 2020-10-26 | 2021-02-12 | 维沃移动通信有限公司 | Antenna detection circuit, electronic device, and antenna control method |
-
2018
- 2018-08-29 CN CN201821406015.8U patent/CN208674343U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109935950A (en) * | 2018-08-29 | 2019-06-25 | 浙江科比特科技有限公司 | A kind of antenna feeding circuit and antenna |
| CN109935950B (en) * | 2018-08-29 | 2024-03-15 | 浙江科比特科技有限公司 | Antenna power supply circuit and antenna |
| CN112367127A (en) * | 2020-10-26 | 2021-02-12 | 维沃移动通信有限公司 | Antenna detection circuit, electronic device, and antenna control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101801145B (en) | Led lamp control circuit and led lamp | |
| CN101848580B (en) | Led lamp control circuit and led lamp | |
| CN101815378B (en) | LED constant current source output short circuit protection circuit | |
| CN209462021U (en) | A kind of reverse connection preventing over-pressure safety device, earphone and USB charging unit | |
| CN208674343U (en) | A kind of antenna feeding circuit and antenna | |
| CN104078919A (en) | LED (Light-Emitting Diode) lamp and electronic breaker thereof | |
| CN109935950A (en) | A kind of antenna feeding circuit and antenna | |
| CN209805511U (en) | Intelligent power distribution cabinet system based on Internet of things | |
| CN207664592U (en) | Over-current detection applied to fire alarm control system protects circuit | |
| CN207965722U (en) | The control circuit of PFC busbar voltages | |
| CN103200726B (en) | The power supply circuits of the control circuit of LED illumination device and LED illumination device | |
| CN202372620U (en) | Detection circuit of circuit breaker | |
| CN212849864U (en) | Reverse connection prevention and overvoltage prevention indicating circuit | |
| CN205725444U (en) | A kind of low-voltage alternating current power supply | |
| CN208423789U (en) | A kind of high-voltage constant current source clamped protection realization circuit | |
| CN113125850A (en) | Pad short circuit structure, power supply circuit and smart electric meter | |
| CN208285065U (en) | A kind of controller circuitry of automatic change-over | |
| CN205484714U (en) | Circuit is listened to killer switch state | |
| CN206498183U (en) | A kind of over-and under-voltage protection circuit | |
| CN108448716A (en) | A kind of controller circuitry of automatic change-over | |
| CN205355779U (en) | Excessive pressure current foldback circuit with long -range notice function | |
| CN210155292U (en) | Safe power-on and power failure detection circuit for low-power equipment | |
| CN208971120U (en) | A kind of low cost current foldback circuit | |
| CN219916463U (en) | Energy storage module monitoring circuit | |
| CN209592973U (en) | PMOS tube protects circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |