CN209545546U - Transmitting input pulsewidth protects circuit in a kind of solid-state radar - Google Patents
Transmitting input pulsewidth protects circuit in a kind of solid-state radar Download PDFInfo
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- CN209545546U CN209545546U CN201921359798.3U CN201921359798U CN209545546U CN 209545546 U CN209545546 U CN 209545546U CN 201921359798 U CN201921359798 U CN 201921359798U CN 209545546 U CN209545546 U CN 209545546U
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Abstract
The utility model discloses transmitting input pulsewidths in a kind of solid-state radar to protect circuit, including wave detector, coupler, bistable trigger-action circuit, comparison circuit and transmitter；The wave detector input terminal is connected by coupler with transmitter input end；The wave detector output end is connected by bistable trigger-action circuit with comparison circuit input terminal；The comparison circuit output end is connected with the transmitter control signal input, for exporting pulsewidth protection signal.The utility model can be with the input signal of effective monitoring transmitter, judge to emit whether the pulse width of input signal is more than preset value, then control unit carries out logic judgment, realize the open/close state of transmitter, the excessive power tube caused in transmitter of pulse width of transmitting input signal is avoided to damage, the job stability and reliability of transmitter are greatly improved, and circuit is simple, it is low in cost.
Description
Technical field
The utility model belongs to transmitting input pulsewidth protection circuit in circuit field more particularly to a kind of solid-state radar.
Background technique
For multiple, the frequent meteorological disaster that China faces at present, country's investment vast resources carries out detection and pre-
Report, the hundreds of various weather radars arranged net including the whole nation.In order to ensure meteorological detection and forecast, various radar need 24 are small
When continual normal work.And ensure that the normal work of radar and the correctness of detection, accurate type are just big at one at the moment
Problem.And the transmitter in radar is wherein important component, there is extremely important effect.Since radar is sent out using pulse
Beam system, transmitter work be in pulse condition rather than in continuous wave state, if it exceeds certain working pulse width,
It is easy to cause the damage of the transmitting unit device of transmitter.
Utility model content
The purpose of this utility model is that solve the above-mentioned problems and provides transmitting input arteries and veins in a kind of solid-state radar
Width protection circuit, including wave detector, coupler, bistable trigger-action circuit, comparison circuit and transmitter；The wave detector input terminal
It is connected by coupler with transmitter input end；The wave detector output end is inputted by bistable trigger-action circuit and comparison circuit
End is connected；The comparison circuit output end is connected with the transmitter control signal input, for exporting pulsewidth protection letter
Number.
The utility model achieves the above object through the following technical schemes: one coupler is set in transmitting input terminal,
RF pulse signal coupling is first sent to peak detector and carries out detection, DC component detected, such direct current point
Amount has RF envelope information, is then carrying out pulse width inspection by double D stable trigger circuits, is finally sending to comparison circuit
After being compared, generates one and cross pulsewidth protection signal.And this signal can be used to carry out to RF switch, amplifier power supply etc.
Controlable electric current is controlled, to achieve the purpose that close transmit circuit.
The utility model has the beneficial effects that: the utility model can be sentenced with the input signal of effective monitoring transmitter
Whether the pulse width of disconnected transmitting input signal is more than preset value, and then control unit carries out logic judgment, realizes transmitter
Open/close state avoids the excessive power tube caused in transmitter of pulse width of transmitting input signal from damaging, greatly improves
The job stability and reliability of transmitter, and circuit is simple, it is low in cost.
Detailed description of the invention
Fig. 1 is the circuit diagram of the utility model；
Fig. 2 is the circuit diagram of bistable trigger-action circuit；
Fig. 3 is the circuit diagram of comparison circuit.
In figure: the first trigger of M1-；The second trigger of M2-；M3- third trigger；The 4th trigger of M4-；U1A- first
Comparator；The second comparator of U2A-；The first phase inverter of F1-；The second phase inverter of F2-；The first zener diode of D1A-；D2A- second
Zener diode；C1- first capacitor；The second capacitor of C2-；C3- third capacitor；R1- first resistor；R2- second resistance；R3-
Three resistance；The 4th resistance of R4-；The 5th resistance of R5-；The 6th resistance of R6-；The 7th resistance of R7-；The first power supply of U1-；The second electricity of U2-
Source；U3- third power supply.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing:
As shown in Figure 1, transmitting input pulsewidth protects circuit, including wave detector, coupling in a kind of solid-state radar of the utility model
Clutch, bistable trigger-action circuit, comparison circuit and transmitter；The wave detector input terminal passes through coupler and transmitter input end
It is connected；The wave detector output end is connected by bistable trigger-action circuit with comparison circuit input terminal；The comparison circuit output
End is connected with the transmitter control signal input, for exporting pulsewidth protection signal.
Further, the bistable trigger-action circuit includes the first steady-state circuit and the second steady-state circuit.
First steady-state circuit include the first power supply, the first trigger, the second trigger, first resistor, first capacitor,
First diode and the first phase inverter；It is the wave detector output end and the first trigger input, the second trigger input, anti-
Phase device input terminal；First inverter output connects the asynchronous zero setting end of second trigger；First trigger first
Output the second trigger first input end of termination；The input of first trigger second termination the first resistor first end, the one or two
Pole pipe cathode；First power supply connects the asynchronous zero setting end of first trigger, first resistor second end, by first capacitor
One diode cathode；The second trigger output end is connected with the comparator input terminal.First phase inverter and the second reverse phase
Device is all made of CD4069 phase inverter.First trigger, the second trigger, third trigger and the 4th trigger are d type flip flop.
Second steady-state circuit include second source, third trigger, the 4th trigger, second resistance, people's capacitor,
Second diode and the second phase inverter；The wave detector output end and third trigger input, the second inverter input phase
Even；Second inverter output is connected with the 4th trigger input；The output of third trigger first termination the 4th
The asynchronous zero setting end of trigger；The third trigger second output terminal connects second resistance first end, the second diode cathode；It is described
Second source connects the asynchronous zero setting end of third trigger, second resistance second end, the second diode cathode；4th trigger is defeated
Outlet is connected with the comparator input terminal.
Further, the comparison circuit includes first comparator, the second comparator, third capacitor, two pole of the first pressure stabilizing
Pipe, the second zener diode, third power supply, the 4th power supply, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance and the 7th
Resistance；The first comparator positive input terminates the bistable trigger-action circuit output end；The first comparator negative input end
Connect third capacitor first end, the second comparator positive input terminal, 3rd resistor first end；The third capacitor second end ground connection；Institute
It states 3rd resistor second and terminates the second zener diode anode, the 4th resistance first end；The third power supply connects the 4th resistance
Two ends；The second comparator negative input terminates the 5th resistance second end, the 6th resistance first end, the 7th resistance first end；Institute
It states the 4th power supply and connects the 5th resistance first end；The 6th resistance second end ground connection；Second comparator output terminal connects second
Zener diode cathode, the 7th resistance second end.
RF pulse signal coupling is first sent to peak by the way that a coupler is arranged in transmitting input terminal by the utility model
It is worth wave detector and carries out detection, DC component detected, such DC component has RF envelope information, is then passing through
Double D stable trigger circuits carry out pulse width inspection, finally send to comparison circuit after being compared, and generate one and cross pulsewidth protection
Signal.And this signal can be used to control the controlable electric currents such as RF switch, amplifier power supply, close hair to reach
The purpose of transmit-receive radio road.
After power on circuitry, the second comparator negative input end is generated the direct current of 8.25V by the 5th resistance and the 6th electric resistance partial pressure
Voltage, the second comparator positive input terminal current potential is lower than the second comparator negative input end, the high electricity of the second comparator output when being initially powered
Position.Due to the positive feedback effect of the 7th resistance, so that comparator is saturated rapidly, over time, third capacitor gradually fills
The current potential of electricity, the second comparator positive input terminal gradually rises, when being higher than current potential (8.25V) of the second comparator negative input end,
The overturning of second comparator, exports low potential, and the effect of same positive feedback is so that the process is stronger, and third capacitor passes through the at this time
Three resistance and the second zener diode discharge to the second comparator output terminal.When the voltage on third capacitor is lower than the second comparator
When the voltage of negative input end, circuit is overturn again, the process of front is repeated, to form 8000Hz's at third capacitor both ends
Sawtooth voltage.The sawtooth voltage is directly applied to the negative input end of first comparator, and is compared with control voltage.When
When third capacitor both end voltage is higher than input control voltage, first comparator exports low potential, is lower than defeated when input control voltage
High potential out is equivalent to and the top half of sawtooth is cut away, therefore control voltage is higher, and sawtooth is cut away fewer, output
Pulsewidth is wider.First zener diode and the second zener diode play slicing, realize the shaping of pulse output.
The utility model is capable of the input signal of effective monitoring transmitter, judges that the pulse width for emitting input signal is
No is more than preset value, and then control unit carries out logic judgment, realizes the open/close state of transmitter, avoids transmitting input signal
The excessive power tube caused in transmitter of pulse width damage, greatly improve the job stability of transmitter and reliable
Property, and circuit is simple, low in cost, the device mature and reliable of use.
The limitation that the technical solution of the utility model is not limited to the above specific embodiments, all skills according to the present utility model
The technology deformation that art scheme is made, each falls within the protection scope of the utility model.
Claims (3)
1. transmitting input pulsewidth protects circuit in a kind of solid-state radar, which is characterized in that including wave detector, coupler, bistable state
Trigger circuit, comparison circuit and transmitter；The wave detector input terminal is connected by coupler with transmitter input end；The inspection
Wave device output end is connected by bistable trigger-action circuit with comparison circuit input terminal；The comparison circuit output end and the transmitting
Device control signal input is connected, for exporting pulsewidth protection signal.
2. transmitting input pulsewidth protects circuit in a kind of solid-state radar according to claim 1, which is characterized in that the bistable
State trigger circuit includes the first steady-state circuit and the second steady-state circuit；
First steady-state circuit includes the first power supply, the first trigger, the second trigger, first resistor, first capacitor, first
Diode and the first phase inverter；The wave detector output end and the first trigger input, the second trigger input, phase inverter
Input terminal；First inverter output connects the asynchronous zero setting end of second trigger；First trigger first exports
Terminate the second trigger first input end；The input of first trigger second termination the first resistor first end, first diode
Cathode；First power supply connects the asynchronous zero setting end of first trigger, first resistor second end, the one or two by first capacitor
Pole pipe anode；The second trigger output end is connected with the comparator input terminal；
Second steady-state circuit includes second source, third trigger, the 4th trigger, second resistance, people's capacitor, second
Diode and the second phase inverter；The wave detector output end is connected with third trigger input, the second inverter input；Institute
The second inverter output is stated to be connected with the 4th trigger input；The output of third trigger first the 4th trigger of termination
Asynchronous zero setting end；The third trigger second output terminal connects second resistance first end, the second diode cathode；Second electricity
Source connects the asynchronous zero setting end of third trigger, second resistance second end, the second diode cathode；The 4th trigger output end with
The comparator input terminal is connected.
3. transmitting input pulsewidth protects circuit in a kind of solid-state radar according to claim 1, which is characterized in that the comparison
Circuit includes first comparator, the second comparator, third capacitor, the first zener diode, the second zener diode, third electricity
Source, the 4th power supply, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance and the 7th resistance；The first comparator is just defeated
Enter to terminate the bistable trigger-action circuit output end；The first comparator negative input termination third capacitor first end, the second ratio
Compared with device positive input terminal, 3rd resistor first end；The third capacitor second end ground connection；The termination of 3rd resistor second second is steady
Press diode cathode, the 4th resistance first end；The third power supply connects the 4th resistance second end；The second comparator negative input
Terminate the 5th resistance second end, the 6th resistance first end, the 7th resistance first end；4th power supply connects the 5th resistance first
End；The 6th resistance second end ground connection；Second comparator output terminal connects the second zener diode cathode, the 7th resistance
Two ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921359798.3U CN209545546U (en) | 2019-08-21 | 2019-08-21 | Transmitting input pulsewidth protects circuit in a kind of solid-state radar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921359798.3U CN209545546U (en) | 2019-08-21 | 2019-08-21 | Transmitting input pulsewidth protects circuit in a kind of solid-state radar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209545546U true CN209545546U (en) | 2019-10-25 |
Family
ID=68247001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921359798.3U Active CN209545546U (en) | 2019-08-21 | 2019-08-21 | Transmitting input pulsewidth protects circuit in a kind of solid-state radar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209545546U (en) |
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2019
- 2019-08-21 CN CN201921359798.3U patent/CN209545546U/en active Active
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