CN108988886A - Inexpensive three branch millimeter wave alarm devices receive circuit - Google Patents
Inexpensive three branch millimeter wave alarm devices receive circuit Download PDFInfo
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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
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/68—Combinations of amplifiers, e.g. multi-channel amplifiers for stereophonics
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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
- H04B1/12—Neutralising, balancing, or compensation arrangements
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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
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- H04B1/1638—Special circuits to enhance selectivity of receivers not otherwise provided for
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Abstract
The invention discloses a kind of inexpensive three branches millimeter wave alarm devices to receive circuit, including low noise difference amplifier, integrator, subtracter, emitter following circuit, low noise exchange amplification branch, low noise AC linear amplifies branch, low noise direct current logarithmic amplification branch, controllable a reference source and embedded system, differential signal inputs low noise difference amplifier, integrated device is connected with subtracter and emitter following circuit respectively, the output end of emitter following circuit is connected with amplification branch in a low voice is exchanged, the output end of low noise exchange amplification branch is connected with the first input end of embedded system, the input terminal that the output end of subtracter saves Linear Amplifer branch and low noise direct current logarithmic amplification branch with direct current low noise respectively is connected, its output end is connected with the second input terminal of embedded system and third input terminal respectively.Structure of the invention is compact, low in cost, and the accuracy of object judgement can be improved, and effectively excludes the influence that active interference receives circuit to millimeter wave alarm device.
Description
Technical field
The present invention relates to target acquisitions to alert field, and especially a kind of inexpensive three branches millimeter wave alarm device receives electricity
Road.
Background technique
It is the device for receiving the millimeter-wave signal of active Terminal munition on battlefield, millimeter that millimeter wave alarm device, which receives circuit,
Wave is located among microwave band and infrared band, and wavelength is 1mm to 10mm, and frequency is from 300GHz to 30GHz.With panzer
Protection level is continuously improved, and the development of active Terminal munition is shown one's talent in numerous precise strike ammunitions, it specially attacks smooth
The most weak place of the top protection of gram armored vehicle threatens maximum caused by armored target.Such armored target is quasi- in real time
Really effective alarm becomes the main direction of development of current ammunition weapon, and at the same time, various perturbation techniques are also flourishing,
This also means that traditional millimeter wave alarm device is unable to satisfy the requirement in battlefield.
Traditional millimeter wave alarm device receive circuit only include communication channel module and usually receive the dynamic range of signal compared with
It is small, identification signal can be provided when receiving active Terminal munition target, but when there are active interference effects to the alarm device to receive
When circuit, which, which receives circuit, can also provide alarm signal, so that millimeter wave alarm device circuit is quick to active end
The recognition capability of bullet substantially reduces, and causes it that can not effectively identify target.
Summary of the invention
The purpose of the present invention is to provide a kind of inexpensive three branches millimeter wave alarm devices to receive circuit.
Realize technical solution of the invention are as follows: a kind of inexpensive three branches millimeter wave alarm device reception circuit, it is special
Sign is, including low noise difference amplifier, integrator, subtracter, emitter following circuit, low noise exchange amplification branch, low noise
AC linear amplifies branch, low noise direct current logarithmic amplification branch, controllable a reference source and embedded system；Wherein:
The low noise difference amplifier is received from receiver front end treated millimeter wave differential signal, by the signal
It is converted into millimeter wave single-ended signal and exports to integrator；Integrator is filtered integral to millimeter wave single-ended signal, after integral
Single-ended signal be separately input into the first input end of subtracter and the input terminal of emitter following circuit, the output level of controllable a reference source
It is input to the second input terminal of subtracter, subtracter subtracts each other the signal of two input terminals, and is exported respectively to low noise
AC linear amplifies branch and low noise direct current logarithmic amplification branch；The emitter following circuit delays the single-ended signal after integral
Output signal is input to low noise exchange amplification branch after punching；
The low noise direct current Linear Amplifer branch carries out the amplification of direct current signal in-phase proportion to the millimeter-wave signal of input,
Amplified signal is exported to the second input terminal of embedded system, by the A/D acquisition conversion module of embedded system that this is defeated
Enter signal and is converted into digital signal, to carry out Digital Signal Processing, when received millimeter-wave signal voltage value is less than 3.3V, and
When meeting required time width, then the signal voltage value of this branch is compared with first threshold, then if more than the threshold value
Outputting alarm signal, otherwise without alarm；
The low noise direct current logarithmic amplification branch carries out logarithmic amplification, the amplified letter to the millimeter-wave signal of input
Number output is converted the input signal by the A/D acquisition conversion module of embedded system to the third input terminal of embedded system
At digital signal, so that Digital Signal Processing is carried out, when received millimeter-wave signal voltage value is greater than 3.3V without generating saturation
When overloading, and meeting required time width, then by the signal voltage value and the second threshold of low noise direct current logarithmic amplification branch
Value compares, if more than the threshold value then outputting alarm signal, otherwise without alarm；
The low noise exchange amplification branch carries out stopping direct current to output signal after buffering, retains AC signal processing, then
It is filtered amplification, output signal is input to the first input end of embedded system, acquires modulus of conversion by the A/D of embedded system
The input signal is converted into digital signal by block, so that Digital Signal Processing is carried out, when low noise direct current logarithmic amplification branch is sent out
When raw overload saturation, then the signal voltage value that low noise exchanges amplification branch is compared with third threshold value, if more than the threshold
It is worth then outputting alarm signal, otherwise without alarm；
First output end of the embedded system is connected with the input terminal of controllable a reference source, controls the defeated of controllable a reference source
Level out, to control the incoming level of the second input terminal of subtracter, embedded system carries out target knowledge according to algorithm
Not, if it is determined that there is target, the second output terminal of embedded system will export alarm signal.
Compared with prior art, the present invention its remarkable advantage are as follows: (1) three branch millimeter wave alarm device of low cost of the invention
Receiving circuit and receiving circuit compared to traditional millimeter wave alarm device has a direct current Linear Amplifer branch, direct current logarithmic amplification branch and
Alternating current-direct current can be received signal and compared, improved the accuracy of object judgement, can effectively exclude active by exchange amplification branch
Interfere the influence that circuit is received to millimeter wave alarm device；(2) three branch millimeter wave alarm device of low cost of the invention receives circuit
Circuit is received compared to traditional millimeter wave alarm device and has carried out blocking stream process, and increases logafier, can effectively be increased
The dynamic range of signal is received, to guarantee normally receive strong, weak signal；(3) low cost three branches milli of the invention
Metric wave alarm device receives circuit and selects low-power chip, substantially reduces work number of the invention, adequately achieves the design of low-power consumption
Theory；(4) present invention uses compact-sized, and small in size, easy to use, used chip and device cost are lower.
Detailed description of the invention
Fig. 1 is the system global structure block diagram that the inexpensive three branch millimeter wave alarm devices of the present invention receive circuit.
Fig. 2 is low noise differential amplifier circuit schematic diagram of the present invention.
Fig. 3 is subtraction circuit schematic diagram of the present invention.
Fig. 4 is low noise direct current branch linear amplifier circuit schematic diagram of the present invention.
Fig. 5 is that low noise of the present invention exchanges amplifier section circuit diagram.
Fig. 6 is log amp circuit schematic diagram of the present invention.
Fig. 7 is the work flow diagram that embedded system of the present invention controls that controllable a reference source carries out dynamic regulation.
Fig. 8 is the work flow diagram of embedded system of the present invention.
Specific embodiment
In conjunction with Fig. 1, a kind of inexpensive three branches millimeter wave alarm device reception circuit realizes target alarms function, including low
Noise differential amplifier 1, integrator 2, subtracter 3, emitter following circuit 4, low noise exchange amplification branch 5, low noise AC linear
Amplify branch 6, low noise direct current logarithmic amplification branch 7, controllable a reference source 8 and embedded system 9.Wherein:
Low noise difference amplifier 1 is received from receiver front end treated millimeter wave differential signal, and by the signal
It is converted into millimeter wave single-ended signal and exports to integrator 2；
Integrator 2 is filtered integral to millimeter wave single-ended signal, and the single-ended signal after integral is separately input into subtracter 3
First input end and emitter following circuit 4 input terminal, the output level of the controllable a reference source 8 is input to the second of subtracter 3
Input terminal, subtracter 3 subtract each other the signal of two input terminals, and are exported respectively to low noise AC linear and amplify branch 6
With low noise direct current logarithmic amplification branch 7；
Output signal is input to low noise exchange amplification branch after single-ended signal after 4 pairs of emitter following circuit integrals buffers
5；
The millimeter-wave signal of 6 pairs of branch of low noise direct current Linear Amplifer inputs carries out the amplification of direct current signal in-phase proportion, puts
Signal after big is exported to the second input terminal of embedded system 9, by the A/D acquisition conversion module of embedded system 9 that this is defeated
Enter signal and is converted into digital signal, to carry out Digital Signal Processing, when received millimeter-wave signal voltage value is less than 3.3V, and
When meeting required time width, then the signal voltage value of this branch is compared with first threshold, if more than the threshold value
Then outputting alarm signal, otherwise without alarm；
The millimeter-wave signal of 7 pairs of branch of low noise direct current logarithmic amplification inputs carries out logarithmic amplification, after logarithmic amplification
The dynamic range for receiving signal can effectively be increased, which exports to the third input terminal of embedded system 9, by
The input signal is converted into digital signal by the A/D acquisition conversion module of embedded system 9, so that Digital Signal Processing is carried out,
When received millimeter-wave signal voltage value is greater than 3.3V without generating saturation overload, and meet required time width
When, then the signal voltage value of this branch is compared with second threshold, if more than the threshold value then outputting alarm signal, otherwise not into
Row alarm；
Output signal carries out stopping direct current, retains AC signal processing after low noise exchange 5 pairs of branch bufferings of amplification, then carries out
Filter and amplification, output signal are input to the first input end of embedded system 9, acquire conversion module by the A/D of embedded system 9
The input signal is converted into digital signal, so that Digital Signal Processing is carried out, when low noise direct current logarithmic amplification branch 7 occurs
When overload saturation, then the signal voltage value of this branch is compared with third threshold value, if more than the threshold value, then outputting alarm is believed
Number, otherwise without alarm；
First output end of embedded system 9 is connected with the input terminal of controllable a reference source 8, controls the defeated of controllable a reference source 8
Level out has the function that control subtracter output to control the incoming level of the second input terminal of subtracter 3, embedding
Embedded system 9 carries out target identification according to algorithm, if it is determined that there is target, the second output terminal of embedded system 9 reports output
Alert signal.
Further, low noise difference amplifier 1 uses low noise difference chip LT1996.
Further, low noise exchange amplification branch 5 includes capacitance, the first second-order low-pass filter circuit, the two or two
Rank low-pass filter circuit and low noise amplifier circuit, wherein the first second-order low-pass filter circuit, the second second-order low-pass filter circuit
It is all made of OP484ESZ amplifier chip, low noise amplifier circuit uses AD8599ARZ amplifier chip, and capacitance is straight for being isolated
It flows signal and retains AC signal, two second-order low-pass filter circuits carry out second-order filter twice to the millimeter wave AC signal of input
Guarantee that the signal quality of input subsequent amplification circuitry, low noise amplifier circuit carry out positive low noise to the AC signal of input and put
Greatly, the process range for receiving signal can effectively be increased.
Further, low noise direct current Linear Amplifer branch 6 uses AD8599ARZ operation amplifier chip.
Further, low noise direct current logarithmic amplification branch 7 includes the first emitter following circuit and log amp circuit, wherein
First emitter following circuit uses AD8599ARZ operation amplifier chip, and log amp circuit uses AD8138ARMZ operation amplifier core
Piece and AD8310ARM chip.
Further, controllable a reference source 8 includes digital potentiometer circuit and the second emitter following circuit, and wherein digital regulation resistance is electric
Road uses X9118TV14IZ-2.7 digital potentiometer chip, and the second emitter following circuit uses AD8599ARZ chip, embedded system 9
The size of digital potentiometer circuit output level is controlled, which passes through emitter following electronic feedback to subtracter 3, emitter following circuit
Primarily serve buffering, isolation, the effect for improving load capacity.
Further, embedded system 9 includes STM32F405 micro process control module, signal output module and power supply mould
Block, the STM32F405 micro process control module turn the input signal of first input end, the second input terminal, third input terminal
It changes digital signal into, then Digital Signal Processing is carried out to the signal, if the low noise direct current Linear Amplifer branch is not satisfied
And overload, then the signal voltage value of the branch is compared with first threshold, if the branch occur saturation overload but it is described low
Noise direct current logarithmic amplification branch do not occur saturation overload, then by the signal voltage value of the low noise direct current logarithmic amplification branch with
Second threshold is compared, and is otherwise compared the signal voltage value that the low noise exchanges amplification branch with third threshold value,
The then outputting alarm signal, while STM32F405 micro process control mould when the signal voltage value of corresponding branch is greater than corresponding threshold value
Root tuber collects the size of signal according to alarm branch, exports analog signal from the first output end by the internal D/A, goes adjustment can
The output level size of a reference source 8 is controlled, the power module provides electric power support for entire operating circuit.
In conjunction with Fig. 2, low noise difference amplifier includes low noise difference chip LT1996 and its peripheral circuit, broadband receiver
The active target millimeter-wave signal received amplification post-detection is converted to video differential signal and inputs to low noise difference and put by front end
Big device, the differential signal are inputted by Vin1+ and Vin1- respectively, and Vin1- is inputted by first resistor R13, first resistor R13's
The other end is connected with the tenth pin of LT1996, while the tenth pin of LT1996 is connected with second resistance R14, second resistance
The other end of R14 is grounded, and Vin1+ is inputted by 3rd resistor R23, the other end of 3rd resistor R23 and the first foot of LT1996
It is connected, while the first foot of LT1996 is connected with the 4th resistance R18, the other end ground connection of the 4th resistance R18, the second of LT1996
Foot and third foot are connected with the both ends of the 5th resistance Z1 respectively, and the octal and the 9th foot of LT1996 is respectively with the 6th resistance Z2's
Both ends are connected, and the 4th foot of LT1996 is connected with -5V power supply, the 7th foot of LT1996 and+5V power supply and first capacitor C15 and second
One end of capacitor C14 is connected, and the 5th foot of the other end and LT1996 of first capacitor C15 and the second capacitor C14 is grounded,
The 6th foot of LT1996 is connected with the 7th resistance R29, the amplified single-ended signal of other end output difference of the 7th resistance R29
U1_OUT, while being connected with third capacitor C16, the other end ground connection of third capacitor C16.
In conjunction with Fig. 3, subtraction circuit includes amplifier chip OP484 and its peripheral circuit, the millimeter wave exported by integrator
Signal Vin+ is input to the third pin of OP484 chip, while the third of OP484 chip via the 8th resistance R21 of 5.1K Ω
Pin meets the 9th resistance R18 of 51K Ω, resistance other end ground connection, the feedback level signal Vin- exported by controllable a reference source
The second pin of OP484 chip is input to via the tenth resistance R23 of 5.1K Ω, while Vin- connects one end of the 4th capacitor C3,
Capacitor other end ground connection, the 4th pin of OP484 chip and the 8th pin are respectively connected to -5V and+5V power supply, the first pin with
The eleventh resistor of a 51K Ω is bridged between second pin, then the signal of the first pin output is the output letter of subtracter
Number, by the resistance parameter used in this circuit, the signal of output and the signal relation of input are as follows: Vout=(R18/R21) *
((Vin+)-(Vin-))=10* ((Vin+)-(Vin-)).
In conjunction with Fig. 4, low noise direct current branch linear amplifier circuit includes amplifier chip AD8599ARZ and its peripheral circuit,
Input signal of the output signal of subtracter as direct current branch low noise amplifier circuit, passes through the twelfth resistor of 5.1K Ω
R64 is input to the 5th pin of AD8599ARZ chip, while the pin connects the thirteenth resistor R36 of a 51K Ω, the resistance
Other end ground connection, bridges the 14th resistance R63 of a 51K Ω between the 6th pin of AD8599ARZ chip and the 7th pin,
And the 6th pin connect the 15th resistance of a 5.1K Ω, resistance other end ground connection, the 7th pin of AD8599ARZ chip
Signal be the direct current branch low noise amplifier circuit output signal, pass through the resistance parameter used in this circuit, output
Signal and input signal relationship are as follows: Vout=(1+R36/R62) * Vin=11*Vin.
In conjunction with Fig. 5, it includes capacitance, the first second-order low-pass filter circuit, second that low noise, which exchanges amplifier section circuit,
Second-order low-pass filter circuit, low noise amplifier circuit, signal are inputted from one end of capacitance C8, then capacitance C8's is another
What end was output to the 16th resistance R2 is exchange millimeter-wave signal, which passes through by U2D-OP484 chip and its periphery electricity
The the first second-order low-pass filter circuit and U2C-OP484 chip of road composition and its second second-order low-pass filter of peripheral circuit composition
Circuit is filtered, and filtered signal is exported by the 8th pin of U2C-OP484 chip, which is input to the tenth
One end of seven resistance R19 to the low noise amplifier circuit being made of U3B-AD8599ARZ chip and its peripheral circuit carries out low noise
Sound enhanced processing, amplified signal are exported by the 7th pin of U3B-AD8599ARZ chip to embedded system.
In conjunction with Fig. 6, log amp circuit includes that master chip AD8138ARMZ, AD8310ARM and its peripheral circuit form,
Input signal is input to AD8138ARMZ chip from one end of the 18th resistance RS1, defeated from the 4th pin of AD8310ARM chip
Out, amplified signal is input to embedded system and carries out analog-to-digital conversion and Digital Signal Processing.
In conjunction with Fig. 7, embedded system carries out the flow chart of dynamic regulation to controllable a reference source, to currently not after system electrification
The tributary signal that saturation is overloaded and signal voltage value is minimum carries out data buffer storage, first determines whether the tributary signal needs to carry out
Alarm, judges whether the signal is slow varying signal, if desired alerts and does not control number if not alerting according to the characteristic of signal
Word potentiometer carries out dynamic regulation, if slow varying signal then carries out threshold decision to the sampled value of the tributary signal, when the sampling
Value is greater than threshold value 1 and then increases the output level of digital regulation resistance, to reduce the input signal of embedded system, when the sampled value
Then reduce the output level of digital regulation resistance no more than threshold value 1 and when being less than threshold value 2, to increase the input letter of embedded system
Number, when the sampled value is greater than threshold value 2, then digital regulation resistance is not controlled and carries out dynamic range adjustment.
In conjunction with Fig. 8, three branch millimeter wave alarm device of low cost of the invention receives circuit and successively carries out upon power-up of the system
System initialization and delay wait, and then carry out self-test, main the adopting according to the A/D module inside embedded system of self-checking function
Sample value and the size relation paid in advance of setting are realized, if system does not alert at this time, when sampled value is greater than given threshold 1, are led to
Embedded system control digital regulation resistance increase output is crossed, to reduce the signal for being input to embedded system, if sampled value
It is reduced to normal range (NR) then self-test success and digital regulation resistance is controlled by embedded system when sampled value is less than given threshold 2
Reduce output, to increase the signal for being input to embedded system, if being input to the signal of embedded system after self-test
Reach normal range (NR) then self-test success.Exporting self-test if self-test success, the indicator light is always on, exports certainly if fail self-test
Examine indicator light flashing.Data acquisition is carried out by the A/D module inside embedded system after self-test success, and to the data after acquisition
Digital Signal Processing is carried out, carries out echo signal identification according to treated data and the algorithm of setting, then if there is target
Then outputting alarm signal carries out data if carrying out dynamic range adjustment if outputting alarm signal without target or again
Acquisition.
Claims (7)
1. a kind of inexpensive three branches millimeter wave alarm device receives circuit, which is characterized in that including low noise difference amplifier, product
Device, subtracter, emitter following circuit, low noise exchange amplification branch, low noise AC linear is divided to amplify branch, low noise direct current logarithm
Amplify branch, controllable a reference source and embedded system；Wherein:
The low noise difference amplifier is received from receiver front end treated millimeter wave differential signal, which is converted
At millimeter wave single-ended signal and export to integrator；Integrator is filtered integral to millimeter wave single-ended signal, the list after integral
End signal is separately input into the first input end of subtracter and the input terminal of emitter following circuit, the output level input of controllable a reference source
To the second input terminal of subtracter, subtracter subtracts each other the signal of two input terminals, and is exported respectively to low noise and exchanged
Linear Amplifer branch and low noise direct current logarithmic amplification branch；After the emitter following circuit buffers the single-ended signal after integral
Output signal is input to low noise exchange amplification branch；
The low noise direct current Linear Amplifer branch carries out the amplification of direct current signal in-phase proportion, amplification to the millimeter-wave signal of input
Signal afterwards is exported to the second input terminal of embedded system, is believed the input by the A/D acquisition conversion module of embedded system
Number it is converted into digital signal, to carry out Digital Signal Processing, when received millimeter-wave signal voltage value is less than 3.3V, and met
When required time width, then the signal voltage value of this branch is compared with first threshold, is then exported if more than the threshold value
Alarm signal, otherwise without alarm；
The low noise direct current logarithmic amplification branch carries out logarithmic amplification to the millimeter-wave signal of input, and the amplified signal is defeated
Out to the third input terminal of embedded system, the input signal is converted into counting by the A/D acquisition conversion module of embedded system
Word signal is overloaded when received millimeter-wave signal voltage value is greater than 3.3V without generating saturation to carry out Digital Signal Processing,
And when meeting required time width, then by the signal voltage value of low noise direct current logarithmic amplification branch compared with second threshold
Compared with if more than the threshold value then outputting alarm signal, otherwise without alarm；
The low noise exchange amplification branch carries out stopping direct current to output signal after buffering, retains AC signal processing, then carries out
Filter and amplification, output signal are input to the first input end of embedded system, will by the A/D acquisition conversion module of embedded system
The input signal is converted into digital signal, so that Digital Signal Processing is carried out, when low noise direct current logarithmic amplification branch occurred
When carrying saturation, then the signal voltage value that low noise exchanges amplification branch is compared with third threshold value, then if more than the threshold value
Outputting alarm signal, otherwise without alarm；
First output end of the embedded system is connected with the input terminal of controllable a reference source, controls the output electricity of controllable a reference source
Flat size, to control the incoming level of the second input terminal of subtracter, embedded system carries out target identification according to algorithm, such as
Fruit judgement has target, and the second output terminal of embedded system will export alarm signal.
2. inexpensive three branches millimeter wave alarm device according to claim 1 receives circuit, which is characterized in that the low noise
Difference amplifier uses low noise difference chip LT1996.
3. inexpensive three branches millimeter wave alarm device according to claim 1 receives circuit, which is characterized in that the low noise
Sound exchange amplification branch includes capacitance, the first second-order low-pass filter circuit, the second second-order low-pass filter circuit and low noise
Amplifying circuit, wherein the first second-order low-pass filter circuit, the second second-order low-pass filter circuit are all made of OP484ESZ amplifier chip,
Low noise amplifier circuit use AD8599ARZ amplifier chip, capacitance for isolated DC signal retain AC signal, two
Second-order low-pass filter circuit carries out second-order filter twice to the millimeter wave AC signal of input, and low noise amplifier circuit is to input
AC signal carries out positive low noise amplification.
4. inexpensive three branches millimeter wave alarm device according to claim 1 receives circuit, which is characterized in that the low noise
Sound direct current Linear Amplifer branch uses AD8599ARZ operation amplifier chip.
5. inexpensive three branches millimeter wave alarm device according to claim 1 receives circuit, which is characterized in that the low noise
Sound direct current logarithmic amplification branch includes the first emitter following circuit and log amp circuit, wherein the first emitter following circuit uses
AD8599ARZ operation amplifier chip, log amp circuit use AD8138ARMZ operation amplifier chip and AD8310ARM core
Piece.
6. inexpensive three branches millimeter wave alarm device according to claim 1 receives circuit, which is characterized in that described controllable
A reference source includes digital potentiometer circuit and the second emitter following circuit, and wherein digital regulation resistance circuit uses X9118TV14IZ-2.7
Digital potentiometer chip machine, the second emitter following circuit use AD8599ARZ chip, and it is defeated that embedded system controls digital potentiometer circuit
The size of level out, the output level pass through emitter following electronic feedback to subtracter.
7. inexpensive three branches millimeter wave alarm device according to claim 1 receives circuit, which is characterized in that the insertion
Formula system includes STM32F405 micro process control module, signal output module and power module, the STM32F405 micro process
The input signal of first input end, the second input terminal, third input terminal is converted into digital signal by control module, then to the signal
Digital Signal Processing is carried out, if saturation overload does not occur for the low noise direct current Linear Amplifer branch, by the signal of the branch
Voltage value is compared with first threshold, if saturation overload occurs for the branch but the low noise direct current logarithmic amplification branch is not sent out
The signal voltage value of the low noise direct current logarithmic amplification branch, then be compared by raw saturation overload with second threshold, otherwise will
The signal voltage value of the low noise exchange amplification branch is compared with third threshold value, when the signal voltage value of corresponding branch is big
Then outputting alarm signal when corresponding threshold value, while STM32F405 micro process control module collects signal according to alarm branch
Size, by internal D/A from the first output end export analog signal, adjust the output level size of controllable a reference source, the electricity
Source module provides electric power support for entire operating circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810545714.9A CN108988886B (en) | 2018-05-25 | 2018-05-25 | Low-cost three-branch millimeter wave alarm receiving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810545714.9A CN108988886B (en) | 2018-05-25 | 2018-05-25 | Low-cost three-branch millimeter wave alarm receiving circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108988886A true CN108988886A (en) | 2018-12-11 |
| CN108988886B CN108988886B (en) | 2020-08-11 |
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| CN201810545714.9A Expired - Fee Related CN108988886B (en) | 2018-05-25 | 2018-05-25 | Low-cost three-branch millimeter wave alarm receiving circuit |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205080198U (en) * | 2015-09-18 | 2016-03-09 | 成都九洲迪飞科技有限责任公司 | Millimeter wave detector |
| CN105703718A (en) * | 2014-11-27 | 2016-06-22 | 西安丁子电子信息科技有限公司 | A portable double-phase digital lock-in amplifier instrument |
| CN206164484U (en) * | 2016-10-31 | 2017-05-10 | 成都安普利电子有限责任公司 | Detection logarithm video amplifier |
| CN106941359A (en) * | 2017-01-12 | 2017-07-11 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | The high-power low-noise reception front end of millimeter wave |
| CN107659326A (en) * | 2017-08-30 | 2018-02-02 | 南京理工大学 | Novel millimeter wave receiver output signal dynamic expansion device |
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2018
- 2018-05-25 CN CN201810545714.9A patent/CN108988886B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105703718A (en) * | 2014-11-27 | 2016-06-22 | 西安丁子电子信息科技有限公司 | A portable double-phase digital lock-in amplifier instrument |
| CN205080198U (en) * | 2015-09-18 | 2016-03-09 | 成都九洲迪飞科技有限责任公司 | Millimeter wave detector |
| CN206164484U (en) * | 2016-10-31 | 2017-05-10 | 成都安普利电子有限责任公司 | Detection logarithm video amplifier |
| CN106941359A (en) * | 2017-01-12 | 2017-07-11 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | The high-power low-noise reception front end of millimeter wave |
| CN107659326A (en) * | 2017-08-30 | 2018-02-02 | 南京理工大学 | Novel millimeter wave receiver output signal dynamic expansion device |
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| CN108988886B (en) | 2020-08-11 |
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