CN208656747U - Anti-jamming circuit, signal receiving circuit and electronic equipment - Google Patents
Anti-jamming circuit, signal receiving circuit and electronic equipment Download PDFInfo
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- CN208656747U CN208656747U CN201821418329.XU CN201821418329U CN208656747U CN 208656747 U CN208656747 U CN 208656747U CN 201821418329 U CN201821418329 U CN 201821418329U CN 208656747 U CN208656747 U CN 208656747U
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Abstract
The utility model embodiment discloses a kind of anti-jamming circuit, signal receiving circuit and electronic equipment, is related to signal processing technology field.The technical solution mainly used are as follows: anti-jamming circuit, comprising: the first diode being connected in parallel in main line and the second diode；The anode of the first diode is connect with the main line, and the cathode ground connection of the first diode, the cathode of second diode is connect with the main line, the plus earth of second diode；Wherein, the input terminal of the main line and output end are provided with quick electric connecting terminal, and the input terminal of the main line with antenna for connecting, and the output end of the main line with the input terminal of signal receiving circuit for connecting.Anti-jamming circuit provided by the embodiment of the utility model, and then solve relatively high power signal to the interference problem of smaller power signal.
Description
Technical field
The utility model embodiment is related to signal processing technology field, connects more particularly to a kind of anti-jamming circuit, signal
Receive circuit and electronic equipment.
Background technique
Many lower-powered signal circuits are easy to be led to useful lower-powered signal by external interference effect
By the biggish interference signal covering of power ratio, more powerful interference signal also results in lower-powered signal circuit saturation,
Lose function.For example, satellite GPS signal is very weak, the useful GPS that mobile phone and smartwatch antenna end receive usually-
130dBm or less, it is easy to which the signal that is not intended to generated when being worked by the circuit of mobile phone and smartwatch itself interferes, same MIC
Signal, FM receive signal, and radio frequency receiving signal etc. is all that typical power is smaller and be easy the signal being disturbed.
In the prior art to solve the above-mentioned problems, filtering device is usually added on receiving circuit, filters out interference signal；
Or increasing filtering device on the circuit that interference generates, it reduces interference and generates.
But in the specific implementation process, following technical problem exists in the prior art: on receiving circuit plus filtering
Wave device, filter effect is ideal not to the utmost, will affect useful signal, and filter circuit cannot filter out useful signal same frequency band it is dry
It disturbs and close band interference；Since the source circuit that interference generates is not easy to find, difficulty is positioned and rectifies and improves, some interference sources
It is that useful signal cannot filter out, the circuit that some interference generate can not add the factors such as filtering device, using the electricity generated in interference
Road increases the mode of filtering device, also can not effectively solve above-mentioned interference problem.
Utility model content
In view of this, the utility model embodiment provides a kind of anti-jamming circuit, signal receiving circuit and electronic equipment,
Main purpose is to solve the interference problem of lower-powered signal.
To solve the above-mentioned problems, the utility model embodiment mainly provides the following technical solutions:
In a first aspect, the utility model embodiment provides a kind of anti-jamming circuit comprising: it is connected in parallel in main line
First diode and the second diode；
The anode of the first diode is connect with the main line, and the cathode of the first diode is grounded, and described the
The cathode of two diodes is connect with the main line, the plus earth of second diode；
Wherein, the input terminal of the main line and output end are provided with quick electric connecting terminal, the input of the main line
End with antenna for connecting, and the output end of the main line with the input terminal of signal receiving circuit for connecting.
It the purpose of this utility model and solves its technical problem also following technical measures can be used to further realize.
Optionally, anti-jamming circuit above-mentioned, wherein the conducting voltage of the first diode is 0.2-0.7V；
The conducting voltage of second diode is 0.2-0.7V.
Optionally, anti-jamming circuit above-mentioned, wherein the conducting voltage of the first diode is 0.2-0.3V；
The conducting voltage of second diode is 0.2-0.3V.
Optionally, anti-jamming circuit above-mentioned, further include: filter, the filter are connected in the main line.
Optionally, anti-jamming circuit above-mentioned, further include: signal amplifier, the signal amplifier are connected to described
In main line, and the signal amplifier relative to the first diode and the second diode close to the defeated of the main line
Outlet.
Optionally, anti-jamming circuit above-mentioned, further include: filter, the filter are connected in the main line,
And the filter relative to the signal amplifier close to the input terminal of the main line.
Optionally, anti-jamming circuit above-mentioned, wherein the filter is relative to the first diode and the two or two pole
Manage the input terminal close to the main line；
Or, the filter is relative to the first diode and the second diode close to the output end of the main line.
Optionally, anti-jamming circuit above-mentioned, further include: impedance matching module, the impedance matching module are connected to
In the main line, and the impedance matching module relative to the signal amplifier close to the input terminal of the main line.
Optionally, anti-jamming circuit above-mentioned, wherein the impedance matching module include first capacitor, the second capacitor and
Inductance；
Wherein, the first capacitor and the inductance are sequentially connected in series in the main line, second capacitor one end with
The main line connection, the other end ground connection of second capacitor.
Second aspect, the utility model embodiment also provide a kind of signal receiving circuit, which includes: anti-
Interfere circuit；
The anti-jamming circuit includes: the first diode being connected in parallel in main line and the second diode；
The anode of the first diode is connect with the main line, and the cathode of the first diode is grounded, and described the
The cathode of two diodes is connect with the main line, the plus earth of second diode；
Wherein, the input terminal of the main line and output end are provided with quick electric connecting terminal, the anti-jamming circuit
For connecting with antenna, the output end of the main line and the input terminal of signal receiving circuit connect the input terminal of main line.
The third aspect, the utility model embodiment also provide a kind of electronic equipment, comprising: signal receiving circuit；
The signal receiving circuit includes: anti-jamming circuit；
The anti-jamming circuit includes: the first diode being connected in parallel in main line and the second diode；
The anode of the first diode is connect with the main line, and the cathode of the first diode is grounded, and described the
The cathode of two diodes is connect with the main line, the plus earth of second diode；
Wherein, the input terminal of the main line and output end are provided with quick electric connecting terminal, the anti-jamming circuit
For connecting with antenna, the output end of the main line and the input terminal of signal receiving circuit connect the input terminal of main line.
By above-mentioned technical proposal, technical solution provided by the embodiment of the utility model is at least had the advantage that
Anti-jamming circuit provided by the embodiment of the utility model, setting in parallel is there are two diode in main line, and two
A diode distinguishes one end connection main line other end ground connection, and the connection type of two diodes and main line and ground terminal is
Opposite, i.e., one is just connecing a reversal connection, in this way when anti-jamming circuit is connected between antenna and signal receiving circuit, antenna
Received signal needs to enter back into signal receiving circuit after the processing of anti-jamming circuit, when antenna received signal is power
When lesser useful signal, such as GPS signal, MIC signal, FM receive signal, radio frequency receiving signal etc., these signals can be just
It is normal by anti-jamming circuit, being then transferred to signal terminates circuit；When antenna received signal is the biggish interference letter of power
Number when, if interference signal is positive voltage disturbance signal, then interference signal, is conducting to ground, such as by the diode current flow of positive connection
Interference signal is negative voltage disturbance signal, then the diode current flow of negative sense connection, interference signal is conducting to ground, and then solve
Interference problem of the relatively high power signal to smaller power signal.And it can also be made by turning down the conducting voltages of two diodes
It can filter the more lower interference signal of power, such as filter out the interference signal of same frequency range.In addition, two diodes are also
It can protect rear circuit connected to it, avoid by static discharge scaling loss.
Above description is only the general introduction of the utility model embodiment technical solution, practical new in order to better understand this
The technological means of type embodiment, and being implemented in accordance with the contents of the specification, and in order to allow the utility model embodiment
Above and other objects, features and advantages can be more clearly understood, below the special specific embodiment party for lifting the utility model embodiment
Formula.
Detailed description of the invention
By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field
Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as practical to this
The limitation of new embodiment.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings:
Fig. 1 shows a kind of electric connection structure schematic diagram of anti-jamming circuit provided by the embodiment of the utility model；
Fig. 2 shows the electric connection structure schematic diagrames of another anti-jamming circuit provided by the embodiment of the utility model.
Specific embodiment
Exemplary embodiments of the present disclosure are described in more detail below with reference to accompanying drawings.Although showing the disclosure in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
It is fully disclosed to those skilled in the art.
Embodiment one
As shown in Figure 1, a kind of anti-jamming circuit that the utility model embodiment one proposes, comprising: be connected in parallel in main line 1
First diode 2 and the second diode 3；The anode of the first diode 2 is connect with the main line 1, and the described 1st
The cathode of pole pipe 2 is grounded, and the cathode of second diode 3 is connect with the main line 1, the anode of second diode 3
Ground connection；Wherein, the input terminal of the main line 1 and output end are provided with quick electric connecting terminal, the input terminal of the main line 1
For connecting with antenna, the output end of the main line with the input terminal of signal receiving circuit for connecting.
Specifically, main line 1 is the main connection line of the connection for realizing anti-jamming circuit, direct setting can be
Route on electronic equipment pcb board is also possible to connect the route of setting by wire rod, and length and setting are in electronics
Position in equipment can be configured according to specific needs, herein no longer excessive narration；The input terminal and output end of main line 1
The electric connecting terminal that can quickly connect can be respectively set, or the welding on the wire rod connecting pin of suspension or pcb board
Connecting pin；In addition, multiple electric connecting terminals can also be reserved on main line 1, so that the specific needs according to electronic equipment are anti-dry
It disturbs to connect in circuit and first closes electronic component, or connection has the circuit etc. of utility function.First diode 2 and the two or two pole
Pipe 3 is the main components in anti-jamming circuit, the model of the two can be it is identical, be also possible to it is different, can basis
It is specific to need to be configured, first and second in two diodes be for ease of description and the title that sets, be not related to
The meanings such as specific function and number；The position that two diodes are connected in main line 1 can be exchange, as long as guaranteeing two
Person is connected in parallel on main line 1, and the specific connection type of the two and main line 1 and ground terminal can be directly connected to lead
On the reserved electric connecting terminal of route 1, such as when main line is the preset route on pcb board, it can be lingered in advance on pcb board
The electric connecting terminal for connecing two diodes is also possible on main line by welding, weld after main line formation
On.
Anti-jamming circuit provided by the embodiment of the utility model, setting in parallel is there are two diode in main line, and two
A diode distinguishes one end connection main line other end ground connection, and the connection type of two diodes and main line and ground terminal is
Opposite, i.e., one is just connecing a reversal connection, in this way when anti-jamming circuit is connected between antenna and signal receiving circuit, antenna
Received signal needs to enter back into signal receiving circuit after the processing of anti-jamming circuit, when antenna received signal is power
When lesser useful signal, such as GPS signal, MIC signal, FM receive signal, radio frequency receiving signal etc., these signals can be just
It is normal by anti-jamming circuit, being then transferred to signal terminates circuit；When antenna received signal is the biggish interference letter of power
Number when, if interference signal is positive voltage disturbance signal, then interference signal, is conducting to ground, such as by the diode current flow of positive connection
Interference signal is negative voltage disturbance signal, then the diode current flow of negative sense connection, interference signal is conducting to ground, and then solve
Interference problem of the relatively high power signal to smaller power signal.And it can also be made by turning down the conducting voltages of two diodes
It can filter the more lower interference signal of power, such as filter out the interference signal of same frequency range.In addition, two diodes are also
It can protect rear circuit connected to it, avoid by static discharge scaling loss.
As shown in Figure 1, in specific implementation, wherein the conducting voltage of the first diode 2 is 0.2-0.7V；Described
The conducting voltage of two diodes 3 is 0.2-0.7V.
Specifically, wherein when interfering the power of interference signal of low-power level signal relatively large in electronic equipment, it can be with
The first diode 2 that pressure is 0.6-0.7V that is powered is selected, and selecting conducting voltage is the second diode 3 of 0.6-0.7V；Or,
When interfering the power of interference signal of low-power level signal lower in electronic equipment, can select conducting voltage is 0.2-0.3V's
The second diode 3 that first diode 2 and conducting voltage are 0.2-0.3V.In addition, the specific conducting voltage of two diodes
Setting, can also be set, such as when the power of positive voltage signal in interference signal is larger, and born according to specific service condition
When voltage signal power is relatively small, biggish conducting voltage can be arranged with respect to the second diode 3 in first diode 2, instead
?.
As shown in Fig. 2, in specific implementation, anti-jamming circuit provided by the embodiment of the utility model further include: signal is put
Big device 4, the signal amplifier 4 is connected in the main line 1, and the signal amplifier 4 is relative to the one or two pole
The output end of pipe 2 and the second diode 3 close to the main line 1.
Specifically, the power of useful signal has centainly after the signal filtering received due to anti-jamming circuit to antenna
The decaying of amplitude, so setting signal amplifier 4, amplifies processing to filtered signal, receive signal receiving circuit
Signal, radio frequency receiving signal etc. are received to clearly low-power useful signal, such as GPS signal MIC signal, FM.Wherein, signal
Amplifier 4 can be placed on the receiving end of signal receiving circuit, can also be placed on the output of anti-jamming circuit.
As shown in Fig. 2, in specific implementation, anti-jamming circuit provided by the embodiment of the utility model further include: filter
5, the filter 5 is connected in the main line 1, and the filter 5 relative to the signal amplifier 4 close to described
The input terminal of main line 5.
Specifically, filter 5 (surface acoustic wave, abridge SAW), is mainly used for filtering out dry outside band
It disturbs, that is, consider and receive signal, radio frequency receiving signal etc. not same with wanted received signal such as GPS signal, MIC signal, FM out
Interference signal on frequency band, for assisting above-mentioned first diode 2 and the second diode 3, further filter out can influence it is small
The interference signal of power signal.In addition, filter 5 can be according to the specific type of power selection for the interference signal to be filtered
Number.
As shown in Fig. 2, in specific implementation, the filter is close relative to the first diode and the second diode
The input terminal of the main line；Or, the filter 5 is relative to the first diode 2 and the second diode 3 close to the master
The output end of route 1.
Specifically, since first diode 2 and the second diode 3 constitute the filtering of the interference signal of filtering relatively high power
Source, especially with need signal to be protected with the interference signal of frequency band, and another filtering source that filter 5 is constituted is mainly used for
Interference signal outside filter bag, so the position of two filtering source relative input ends in main line can with no restrictions, i.e. day
The signal that line is collected can first pass through first diode 2 and the second diode 3 is filtered, can also first pass through filter 5 into
Row filtering, as long as interference signal is filtered out.
As shown in Fig. 2, in specific implementation, anti-jamming circuit provided by the embodiment of the utility model further include: impedance
With module 6, the impedance matching module 6 is connected in the main line 1, and the impedance matching module 6 is relative to the letter
The input terminal of number amplifier 4 close to the main line 1.
Specifically, filter 5 can bring radio frequency band (such as GPS after filter 5 are arranged in main line 1
1.5GHz frequency range) the inconsistent situation of impedance occur, i.e., in radio frequency system, it is desirable that device and cabling are 50ohm, single to filter
The impedance that the addition of device will lead to reception circuit is morphed, it is therefore desirable to be increased impedance matching module 6, be passed through impedance matching mould
The realization of debugging transfer impedance of block 6 matches near 50ohm.
As shown in Fig. 2, further, the impedance matching module 6 includes first capacitor 61, the second capacitor 63 and inductance
62；Wherein, the first capacitor 61 and the inductance 62 are sequentially connected in series in the main line 1, described second capacitor, 63 one end
It is connect with the main line 1, the other end ground connection of second capacitor 63.
It is realized specifically, the structure of impedance matching module 6 can also be by other structures commonly used in the prior art, this
Place is with no restrictions.
Embodiment two
A kind of signal receiving circuit that the utility model embodiment two proposes, comprising: anti-jamming circuit；As shown in Figure 1, institute
Stating anti-jamming circuit includes: the first diode 2 being connected in parallel in main line 1 and the second diode 3；The first diode 2
It is positive to be connect with the main line 1, the cathode ground connection of the first diode 2, cathode and the master of second diode 3
Route 1 connects, the plus earth of second diode 3；Wherein, the input terminal of the main line 1 and output end are provided with
Quick electric connecting terminal, the input terminal of the main line 1 of the anti-jamming circuit with antenna for connecting, the output of the main line 1
End is connect with the input terminal of signal receiving circuit.
Specifically, the anti-interference of the offer of above-described embodiment one can be used directly in anti-jamming circuit described in the present embodiment two
Circuit, concrete implementation structure can be found in related content described in above-described embodiment one, and details are not described herein again.Wherein, signal
Receiving circuit can be for receiving connecing for the low-power signals such as GPS signal, MIC signal, FM reception signal, radio frequency receiving signal
Receive circuit.
Anti-jamming circuit provided by the embodiment of the utility model, setting in parallel is there are two diode in main line, and two
A diode distinguishes one end connection main line other end ground connection, and the connection type of two diodes and main line and ground terminal is
Opposite, i.e., one is just connecing a reversal connection, in this way when anti-jamming circuit is connected between antenna and signal receiving circuit, antenna
Received signal needs to enter back into signal receiving circuit after the processing of anti-jamming circuit, when antenna received signal is power
When lesser useful signal, such as GPS signal, MIC signal, FM receive signal, radio frequency receiving signal etc., these signals can be just
It is normal by anti-jamming circuit, being then transferred to signal terminates circuit；When antenna received signal is the biggish interference letter of power
Number when, if interference signal is positive voltage disturbance signal, then interference signal, is conducting to ground, such as by the diode current flow of positive connection
Interference signal is negative voltage disturbance signal, then the diode current flow of negative sense connection, interference signal is conducting to ground, and then solve
Interference problem of the relatively high power signal to smaller power signal.And it can also be made by turning down the conducting voltages of two diodes
It can filter the more lower interference signal of power, such as filter out the interference signal of same frequency range.In addition, two diodes are also
It can protect rear circuit connected to it, avoid by static discharge scaling loss.
Embodiment three
The a kind of electronic equipment that the utility model embodiment three proposes, comprising: signal receiving circuit；The signal receives electricity
Road includes: anti-jamming circuit；As shown in Figure 1, the anti-jamming circuit includes: 2 He of first diode being connected in parallel in main line 1
Second diode 3；The anode of the first diode 2 is connect with the main line 1, the cathode ground connection of the first diode 2,
The cathode of second diode 3 is connect with the main line 1, the plus earth of second diode 3；Wherein, the master
The input terminal and output end of route 1 are provided with quick electric connecting terminal, and the input terminal of the main line 1 of the anti-jamming circuit is used for
It is connect with antenna, the output end of the main line 1 and the input terminal of signal receiving circuit connect.
Specifically, the anti-interference of the offer of above-described embodiment one can be used directly in anti-jamming circuit described in the present embodiment three
Circuit, concrete implementation structure can be found in related content described in above-described embodiment one, and details are not described herein again.Wherein, signal
Receiving circuit can be for receiving connecing for the low-power signals such as GPS signal, MIC signal, FM reception signal, radio frequency receiving signal
Receive circuit.Electronic equipment can be smartwatch, intelligent sound box, Intelligent bracelet, intelligent necklace and other intelligent wearable devices
Deng.
Anti-jamming circuit provided by the embodiment of the utility model, setting in parallel is there are two diode in main line, and two
A diode distinguishes one end connection main line other end ground connection, and the connection type of two diodes and main line and ground terminal is
Opposite, i.e., one is just connecing a reversal connection, in this way when anti-jamming circuit is connected between antenna and signal receiving circuit, antenna
Received signal needs to enter back into signal receiving circuit after the processing of anti-jamming circuit, when antenna received signal is power
When lesser useful signal, such as GPS signal, MIC signal, FM receive signal, radio frequency receiving signal etc., these signals can be just
It is normal by anti-jamming circuit, being then transferred to signal terminates circuit；When antenna received signal is the biggish interference letter of power
Number when, if interference signal is positive voltage disturbance signal, then interference signal, is conducting to ground, such as by the diode current flow of positive connection
Interference signal is negative voltage disturbance signal, then the diode current flow of negative sense connection, interference signal is conducting to ground, and then solve
Interference problem of the relatively high power signal to smaller power signal.And it can also be made by turning down the conducting voltages of two diodes
It can filter the more lower interference signal of power, such as filter out the interference signal of same frequency range.In addition, two diodes are also
It can protect rear circuit connected to it, avoid by static discharge scaling loss.
The above is only embodiments herein, are not intended to limit this application.To those skilled in the art,
Various changes and changes are possible in this application.It is all within the spirit and principles of the present application made by any modification, equivalent replacement,
Improve etc., it should be included within the scope of the claims of this application.
Claims (10)
1. a kind of anti-jamming circuit characterized by comprising
The first diode being connected in parallel in main line and the second diode；
The anode of the first diode is connect with the main line, the cathode ground connection of the first diode, and the described 2nd 2
The cathode of pole pipe is connect with the main line, the plus earth of second diode；
Wherein, the input terminal of the main line and output end are provided with quick electric connecting terminal, and the input terminal of the main line is used
It is connect in antenna, the output end of the main line with the input terminal of signal receiving circuit for connecting.
2. anti-jamming circuit according to claim 1, which is characterized in that
The conducting voltage of the first diode is 0.2-0.7V；
The conducting voltage of second diode is 0.2-0.7V.
3. anti-jamming circuit according to claim 2, which is characterized in that
The conducting voltage of the first diode is 0.2-0.3V；
The conducting voltage of second diode is 0.2-0.3V.
4. anti-jamming circuit according to claim 1, which is characterized in that further include:
Signal amplifier, the signal amplifier are connected in the main line, and the signal amplifier is relative to described
The output end of one diode and the second diode close to the main line.
5. anti-jamming circuit according to claim 4, which is characterized in that further include:
Filter, the filter are connected in the main line, and the filter is close relative to the signal amplifier
In the input terminal of the main line.
6. anti-jamming circuit according to claim 5, which is characterized in that
The filter is relative to the first diode and the second diode close to the input terminal of the main line；
Or, the filter is relative to the first diode and the second diode close to the output end of the main line.
7. anti-jamming circuit according to claim 5, which is characterized in that further include:
Impedance matching module, the impedance matching module are connected in the main line, and the impedance matching module relative to
Input terminal of the signal amplifier close to the main line.
8. anti-jamming circuit according to claim 7, which is characterized in that
The impedance matching module includes first capacitor, the second capacitor and inductance；
Wherein, the first capacitor and the inductance are sequentially connected in series in the main line, second capacitor one end with it is described
Main line connection, the other end ground connection of second capacitor.
9. a kind of signal receiving circuit characterized by comprising
The anti-jamming circuit as described in any in claim 1-8；
Wherein, the input terminal of the main line of the anti-jamming circuit with antenna for connecting, the output end and letter of the main line
Number receive circuit input terminal connection.
10. a kind of electronic equipment characterized by comprising
Signal receiving circuit as claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821418329.XU CN208656747U (en) | 2018-08-31 | 2018-08-31 | Anti-jamming circuit, signal receiving circuit and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821418329.XU CN208656747U (en) | 2018-08-31 | 2018-08-31 | Anti-jamming circuit, signal receiving circuit and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208656747U true CN208656747U (en) | 2019-03-26 |
Family
ID=65791844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821418329.XU Active CN208656747U (en) | 2018-08-31 | 2018-08-31 | Anti-jamming circuit, signal receiving circuit and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208656747U (en) |
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2018
- 2018-08-31 CN CN201821418329.XU patent/CN208656747U/en active Active
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