CN205883257U - Pulse modulation signal reception system - Google Patents
Pulse modulation signal reception system Download PDFInfo
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- CN205883257U CN205883257U CN201620751779.5U CN201620751779U CN205883257U CN 205883257 U CN205883257 U CN 205883257U CN 201620751779 U CN201620751779 U CN 201620751779U CN 205883257 U CN205883257 U CN 205883257U
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Abstract
The utility model discloses a pulse modulation signal reception system, include automatic gain control amplifier, squaring circuit, low pass filter, fixed pulse width decider, trigger formula adc and differential phase demodulator, automatic gain control amplifier input pulse formula 2DPSK modulating signal, the input of squaring circuit and the signal input part who triggers formula adc are connected respectively to automatic gain control amplifier's output, low pass filter's input is connected to the output of squaring circuit, fixed pulse width decider's input is connected to low pass filter's output, fixed pulse width decider's output connect trigger formula adc trigger the input in step, the input of differential phase demodulator is connected to the output that triggers formula adc, fixed pulse width decider is including the decider and the fixed pulse stretcher that connect gradually. The utility model discloses directly carry out carrier recovery output baseband absolute code data, satisfy the application demand.
Description
Technical field
This utility model relates to human body medium's communication technical field, particularly relates to a kind of pulse-modulated signal and receives system
System.
Background technology
Along with electronic information technology, wireless communication technology, semiconductor integrated circuit technology, the swift and violent of bio-medical technology are sent out
Open up, and wireless application demand is improved constantly by people, body area network (BAN, the BodyArea with human body as medium
Network) communication system because it is portable, low-power consumption, the feature of low complex degree, it is possible to be well adapted for medical treatment, space flight, physical culture with
And the demand that human body physical sign is measured and monitored by the field such as military affairs in real time, it is increasingly becoming next generation mobile communication technology and has ground
One of focus direction in studying carefully.
Compared with traditional wireless communication means, the advantage of human body medium's communication is to accomplish nearly full-automation, Ke Yilian
Continuous or be periodically detected and motility is strong, highly reliable and precision is high, and (the body area network sensor being attached to human body can be effective and high
The process human body physical signalling of precision), efficiency is high (low-power consumption lower node length in service life), low cost, low-power consumption, high security
And the advantage such as low human body infringement, and there is not the problem that many people communication efficiency rate reduces.Therefore, research is with human body self
Communication system as transmission medium has become the urgent needs of industry.
At present, the modulation and demodulation technical elements of signal is studied rank also in starting in the human body medium communications field by industry
Section, is around what human body channel, data access, networking and signal processing algorithm aspect were carried out more, and only minority team uses and divides
Vertical element has tentatively been built human body medium and has been transmitted hardware experiment, and the modulation-demodulation technique of human body medium's communication is rarely had report
Road, existing human body medium communicates with OOK (On-Off Keying, binary system on off keying), ASK (amplitude shift keying), 2FSK
Modulation-demodulation techniques such as (Binary Frequency Shift Keyings) is main.2PSK (binary phase shift keying) has preferable error code by contrast
Rate performance, but in 2PSK signal transmission system, there is phase indeterminacy, and will result in receiving symbol " 0 " and the top of " 1 "
Fall, produce error code.In order to keep 2PSK advantage, reduce the bit error rate, 2PSK modulation is improved to BDPSK binary differential phase shift keying and adjusts
System.2DPSK (binary system difference keyed phase shift keying) modulation technique has that efficiency of transmission is high, capacity of resisting disturbance strong, bit error rate
The advantages such as function admirable.But, owing to 2DPSK modulated signal not containing carrier component, it is impossible to directly carry out carrier auxiliary, because of
This existing demodulation method is all to be used with Costas loop correlation demodulation method by quadratic loop phaselocked loop correlation demodulation method
Complicated circuit recovers and modulates the coherent carrier of carrier wave stringent synchronization, virtually adds complexity and the energy of reception system
Consumption, and cause chip area and power consumption after the system integration relatively big, and need to bear higher operating frequency.
Utility model content
Based on above-mentioned situation, the utility model proposes a kind of pulse-modulated signal and receive and method, directly carry out carrier wave
Recover output base band absolute code data, have low-power consumption, low complex degree, at a high speed, feature easy of integration, meet human body medium's transmission
The demand of application.
To achieve these goals, the embodiment of technical solutions of the utility model is:
A kind of pulse-modulated signal receives system, including automatic gain control amplifier, squarer, low pass filter, consolidates
Determine pulse width decision device, trigger-type analog-digital converter and difference phase demodulation device；
The input input pulse formula 2DPSK modulated signal of described automatic gain control amplifier, described automatic gain control
The outfan of amplifier processed connects input and the signal input part of described trigger-type analog-digital converter of described squarer respectively,
The outfan of described squarer connects the input of described low pass filter, and the outfan of described low pass filter connects described solid
Determining the input of pulse width decision device, the outfan of described fixed pulse width decision device connects described trigger-type analog digital conversion
The synchronization of device triggers input, and the outfan of described trigger-type analog-digital converter connects the input of described difference phase demodulation device
End；
Described fixed pulse width decision device includes decision device and fixed pulse stretcher, the output of described low pass filter
End connects the input of described decision device, and the outfan of described decision device connects the input of described fixed pulse stretcher, institute
The outfan stating fixed pulse stretcher connects the synchronization triggering input of described trigger-type analog-digital converter.
Compared with prior art, the beneficial effects of the utility model are: this utility model pulse-modulated signal receives system,
The input input pulse formula 2DPSK modulated signal of automatic gain control amplifier, dynamic gain-controlled amplifier is to pulsed
2DPSK modulated signal carries out automatic growth control amplification, the signal that first via automatic gain control amplifier is exported by squarer
Carrying out square operation, low pass filter extracts the envelope signal carried out after square operation in signal；Fixed pulse width decision device
The envelope signal extracted is made decisions and pulse stretching, it is thus achieved that synchronous digital pulse signal；When synchronous digital pulse signal is defeated
When entering trigger-type analog-digital converter, the second road amplitude envelops stabilization signal is sampled by trigger-type analog-digital converter；The poorest
Divide phase demodulator according to the second road amplitude envelops stabilization signal carries out adjacent two hits that before and after's double sampling obtains
According to, settle recovery output base band absolute code data at one go.This utility model uses pulsed 2DPSK modulated signal to improve human body
The band efficiency of channel, improves transmission rate, and system is operated in digital trigger-type state, directly carries out carrier auxiliary,
The per bit energy consumption of system can be brought with low-power consumption, low complex degree, advantage at a high speed in realization to significantly reduce, and can be complete
Use CMOS (Complementary Metal Oxide Semiconductor, complementary metal oxide semiconductors (CMOS)) integrated electricity
Road technique realizes, and there is not large-area integrated resistor and electric capacity shaping circuit, be suitable for being integrated in SOC (System on Chip,
System level chip) chip, there is good promotional value.
Accompanying drawing explanation
Fig. 1 is that in an embodiment, pulse-modulated signal receives system structure schematic diagram；
Fig. 2 is difference phase demodulation device structural representation in an embodiment；
Fig. 3 is phase comparator structural representation in an embodiment；
Fig. 4 is to receive system structure schematic diagram based on pulse-modulated signal in one concrete example of system shown in Figure 1；
Fig. 5 is that a pulse-modulated signal receives systematic difference example.
Detailed description of the invention
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples,
This utility model is described in further detail.Should be appreciated that detailed description of the invention described herein is only in order to solve
Release this utility model, do not limit protection domain of the present utility model.
In one embodiment pulse-modulated signal receive system, as it is shown in figure 1, include automatic gain control amplifier 101,
Squarer 102, low pass filter 103, fixed pulse width decision device 104, trigger-type analog-digital converter 105 and differential phase solution
Adjust device 106；
The input input pulse formula 2DPSK modulated signal of described automatic gain control amplifier 101, described automatic gain
Control the outfan of amplifier 101 and connect the input of described squarer 102 and described trigger-type analog-digital converter 105 respectively
Signal input part, the outfan of described squarer 102 connects the input of described low pass filter 103, described low pass filter
The outfan of 103 connects the input of described fixed pulse width decision device 104, described fixed pulse width decision device 104
Outfan connects the synchronization of described trigger-type analog-digital converter 105 and triggers input, described trigger-type analog-digital converter 105 defeated
Go out end and connect the input of described difference phase demodulation device 106；
Described fixed pulse width decision device 104 includes decision device 1041 and fixed pulse stretcher 1042, described low pass
The outfan of wave filter 103 connects the input of described decision device 1041, and the outfan of described decision device 1041 connects described solid
Determining the input of pulse stretcher 1042, the outfan of described fixed pulse stretcher 1042 connects described trigger-type analog digital conversion
The synchronization of device 105 triggers input.
Automatic gain control amplifier 101 carries out automatic growth control amplification to pulsed 2DPSK modulated signal, exports two
Road amplitude envelops stabilization signal；Squarer 102 carries out square operation to first via amplitude envelops stabilization signal；Low pass filter
103 extract the envelope signal carried out after square operation in signal；Decision device 1041 in fixed pulse width decision device 104 is to bag
Network signal makes decisions, and fixed pulse stretcher 1042 carries out arteries and veins according to predetermined pulse width to the envelope signal after making decisions
Rush broadening, it is thus achieved that synchronous digital pulse signal；When synchronous digital pulse signal arrives, trigger-type analog-digital converter 105 uses
Preset sample rate the second road amplitude envelops stabilization signal is sampled；Last difference phase demodulation device 106 is according to the second tunnel
Amplitude envelops stabilization signal carries out adjacent two sampled datas that before and after's double sampling obtains, and settles recovery output base band at one go exhausted
To code data.
Trigger-type analog-digital converter is just sampled when synchronous digital pulse signal arrives, remaining time analog-digital converter
Enter holding state and do not export data.
It is evidenced from the above discussion that, this utility model pulse-modulated signal receives system, uses pulsed 2DPSK modulated signal
Improve the band efficiency of human body channel, improve transmission rate, system is operated in digital trigger-type state, directly carries
Ripple recovers, and can bring the per bit energy consumption of system with low-power consumption, low complex degree, advantage at a high speed in realization and significantly reduce,
And CMOS integrated circuit technology can be used completely to realize, there is not large-area integrated resistor and electric capacity shaping circuit, be suitable for
It is integrated in SOC, there is good promotional value.
Additionally, in a concrete example, as in figure 2 it is shown, described difference phase demodulation device 106 includes the first shift LD
Device the 1061, second shift register 1062 and phase comparator 1063；
The outfan of described trigger-type analog-digital converter 105 connects described first shift register 1061, and described first moves
First outfan of bit register 1061 connects the input of described second shift register 1062, described first shift register
Second outfan of 1061 and the outfan of described second shift register 1062 connect described phase comparator 1063 respectively
Input.
Trigger-type analog-digital converter 105 output sampled data for the first time is posted to the first shift register 1061, the first displacement
Storage 1061 carries out shift LD operation to first time sampled data, obtains the first shift LD data dn(t), trigger-type modulus
Transducer 105 output second time sampled data shifts first to the first shift register 1061, the first shift register 1061
Registered data dnT () exports to the second shift register 1062, the second shift register 1062 exports the first shift LD data dn
T () arrives phase comparator 1063, the first shift register 1061 carries out shift LD operation to second time sampled data, obtains the
Two shift LD data dn+1T (), the first shift register 1061 exports the second shift LD data dn+1T () arrives phase comparator
1063, phase comparator 1063 is according to the first shift LD data dn(t) and the second shift LD data dn+1(t) output base band
Absolute code data.
Additionally, in a concrete example, as it is shown on figure 3, described phase comparator 1063 includes digital multiplying circuit
10631, average obtains circuit 10632 and threshold value decision circuit 10633；
Second outfan of described first shift register 1061 connects the first input of described digital multiplying circuit 10631
End, the outfan of described second shift register 1062 connects the second input of described digital multiplying circuit 10631, described number
The outfan of word mlultiplying circuit 10631 connects described average and obtains the input of circuit 10632, and described average obtains circuit
The outfan of 10632 connects the input of described threshold value decision circuit 10633.
Such as first shift register 1061 output signal dn(t), the second shift register 1062 output signal dn+1(t),
So digital multiplying circuit 10631 is by above-mentioned two signal multiplication, obtains circuit 10632 by average and obtains digital multiplying circuit
The direct current average of 10631 output products, threshold value decision circuit 10633 is by this direct current average and a certain mathematics threshold set in advance
Value, corresponding output " logic 1 " or " logical zero ", thus realize the demodulation of pulsed 2DPSK unrelated signal.
Additionally, in a concrete example, said system also includes low-noise amplifier, described low-noise amplifier defeated
Entering end and input described pulsed 2DPSK modulated signal, the outfan of described low-noise amplifier connects described automatic growth control
The input of amplifier.
Low-noise amplifier noise coefficient is the lowest, is amplifying the occasion of small-signal, the noise of low-noise amplifier self
Interference to signal is the least, improves the signal to noise ratio of output.
Additionally, in a concrete example, said system also includes frequency-selecting filter, the input of described frequency-selecting filter
Inputting described pulsed 2DPSK modulated signal, the outfan of described frequency-selecting filter connects the input of described low-noise amplifier
End.
Here special frequency channel in pulsed 2DPSK modulated signal can be obtained by frequency-selecting filter according to actual needs
Signal carries out follow-up study process, is suitable for application.
Additionally, in a concrete example, described fixed pulse stretcher is monostable flipflop.Monostable flipflop pair
The signal of input is fixed pulse stretching, meets and is actually needed.
In order to be more fully understood that said system, this utility model pulse-modulated signal detailed below receives system
Application example.
As shown in Figure 4, frequency-selecting filter 401, low-noise amplifier 402, automatic gain control amplifier can be included
403, squarer 404, low pass filter 405, decision device 406, fixed pulse stretcher 407, trigger-type analog-digital converter 408 and
Difference phase demodulation device 409；
The input input pulse formula 2DPSK modulated signal of frequency-selecting filter 401, the outfan of frequency-selecting filter 401 is even
Connecing the input of low-noise amplifier 402, the outfan of low-noise amplifier 402 connects automatic gain control amplifier 403
Input, the outfan of automatic gain control amplifier 403 connects input and the trigger-type analog digital conversion of squarer 404 respectively
The signal input part of device 408, the outfan of squarer 404 connects the input of low pass filter 405, low pass filter 405
Outfan connects the input of decision device 406, and the outfan of decision device 406 connects the input of fixed pulse stretcher 407, Gu
Determine pulse stretcher 407 outfan connect trigger-type analog-digital converter 408 synchronization trigger input, trigger-type modulus turns
The outfan of parallel operation 408 connects the input of difference phase demodulation device 409；
Described difference phase demodulation device 409 includes that first shift register the 4091, second shift register 4092, numeral are taken advantage of
Method circuit 4093, average obtain circuit 4094 and threshold value decision circuit 4095；
The outfan of trigger-type analog-digital converter 408 connects the first shift register 4091, the first shift register 4091
The first outfan connect the input of the second shift register 4092, the second outfan of the first shift register 4091 connects
The first input end of digital multiplying circuit 4093, the outfan of the second shift register 4092 connects digital multiplying circuit 4093
Second input, the outfan of digital multiplying circuit 4093 connects average and obtains the input of circuit 4094, and average obtains circuit
The outfan of 4094 connects the input of threshold value decision circuit 4095.
Specifically, frequency-selecting filter 401 carries out frequency-selecting filter to the wideband pulse formula 2DPSK modulated signal through human body medium
Ripple, the wideband pulse formula 2DPSK modulated signal after carrying out frequency-selective filtering is amplified by low-noise amplifier 402, automatic gain
Control amplifier 403 and the wideband pulse formula 2DPSK modulated signal of a certain frequency range after amplifying carried out automatic growth control amplification,
Obtaining amplitude envelops stabilization signal r (t), point two-way output amplitude envelope stabilization signal r (t), squarer 404 is to first via amplitude
Envelope stabilization signal r (t) carries out square operation and obtains signal a (t), by low pass filter 405 further noise suppressed, filter
Ripple obtains signal b (t), after being made decisions b (t) by decision device 406, is fixed by fixed pulse stretcher 407 again
The pulse stretching operation of width, thus obtain synchronous digital pulse c (t), the pulse width of c (t) must be more than the arteries and veins of signal r (t)
Rush width, effective pulse information in r (t) can be collected ensureing that trigger-type analog-digital converter 408 is sampled every time, and often
Often group data d that secondary sampling time length and sampling are exportednT the data length (quantity of sampled point) of () is identical, work as synchronization
When digit pulse c (t) arrives, with the sample frequency more than or equal to 2 times of r (t) carrier frequencies, by trigger-type analog-digital converter
Sampling in 408 pairs of the second roads amplitude envelops stabilization signal r (t), obtains data dn (t) (n correspondence sampling number), pass through difference
Phase demodulator 409 settles recovery output base band absolute code data e (t) and synchronous digital pulse c (t) at one go；
Here when synchronous digital pulse c (t) i.e. finally demodulates the supporting synchronization exporting absolute code data e (t) as system
Clock；
Further, trigger-type analog-digital converter 408 is just sampled when the lock-out pulse of signal c (t) arrives, and is gathered
To data be i.e. the digital form of corresponding pulse signal in r (t), and remaining Time Triggered formula analog-digital converter 408 enters
Holding state does not export data；
Further, trigger-type analog-digital converter 408 output sampled data for the first time to the first shift register 4091, first
Shift register 4091 carries out shift LD operation to first time sampled data, obtains the first shift LD data dnT (), triggers
Formula analog-digital converter 408 output second time sampled data is to the first shift register 4091, and the first shift register 4091 is by the
One shift LD data dnT () exports to the second shift register 4092, the second shift register 4092 exports the first displacement and posts
Deposit data dnT () arrives digital multiplying circuit 4093, the first shift register 4091 carries out shift LD to second time sampled data
Operation, obtains the second shift LD data dn+1T (), the first shift register 4091 exports the second shift LD data dn+1(t)
To digital multiplying circuit 4093, such as, the first shift register 4091 output signal is expressed as dn(t)=COS (ω t), second
Shift register 4092 output signal is expressed as dn+1T ()=COS (ω t+ θ), digital multiplying circuit 4093 output signal can be with table
It is shown as:Obtained by average
Circuit 4094 obtains direct current mean value signalThe size of described direct current mean value signal q (t) i.e. embodies dn(t)
With dn+1T the phase information of () data, threshold value decision circuit 4095 compares q (t) and a certain mathematics threshold value set in advance, right
" logic 1 " or " logical zero " should be exported, thus realize the demodulation of pulsed 2DPSK unrelated signal.
As it is shown in figure 5, pulse-modulated signal receives system is applied to human body medium when communicating, the letter that signal source 31 is produced
Number uiSending into the input of 2DPSK transmitter 32, the human body that the outfan of 2DPSK transmitter 32 person wherein is worn is situated between
Wideband pulse formula 2DPSK signal u launched by matter sensor 1n, signal unThe human body medium's channel built by two shaking hands of people is passed
Deliver to the human body medium's sensor 2 worn on the body of another person, human body medium's sensor 2 export wideband pulse formula 2DPSK
Signal u'n, then by the embodiment 33 of Fig. 4 to signal u'nCarry out the irrelevant reception of pulsed 2DPSK and demodulation, export base band
Data Data, complete to process Data data finally by the internal host computer of computer 34, it is not necessary to complicated carrier synchronization is extensive
The circuit such as multiple, Costas loop, high speed and real time sampling, low complex degree, low-power consumption and be easily integrated.
It is evidenced from the above discussion that, wideband pulse formula 2DPSK through human body medium is modulated by the present embodiment frequency-selecting filter
Signal carries out frequency-selective filtering, and the wideband pulse formula 2DPSK modulated signal after carrying out frequency-selective filtering is put by low-noise amplifier
Greatly, automatic gain control amplifier carries out automatic gain to the wideband pulse formula 2DPSK modulated signal of a certain frequency range after amplifying
Control to amplify, it is thus achieved that amplitude envelops stabilization signal；Squarer carries out square operation to first via amplitude envelops stabilization signal；Low pass
Wave filter extracts the envelope signal carried out after square operation in signal；The envelope signal extracted is made decisions by decision device, fixing
Pulse stretcher carries out pulse stretching according to predetermined pulse width to the envelope signal after making decisions, it is thus achieved that synchronous digital pulse
Signal；When synchronous digital pulse signal arrives, trigger-type analog-digital converter uses presets sample rate to the second road amplitude envelops
Stabilization signal is sampled；Last difference phase demodulation device is adopted for twice according to the second road amplitude envelops stabilization signal is carried out before and after
Adjacent two sampled datas that sample obtains, settle recovery output base band absolute code data at one go.This utility model uses pulsed
2DPSK modulated signal improves the band efficiency of human body channel, improves transmission rate, and system is operated in digital trigger-type shape
State, directly carries out carrier auxiliary, can bring the per bit of system in realization with low-power consumption, low complex degree, advantage at a high speed
Energy consumption significantly reduces, and CMOS integrated circuit technology can be used completely to realize, and there is not large-area integrated resistor and electric capacity
Shaping circuit, is suitable for being integrated in SOC, has good promotional value.
Each technical characteristic of embodiment described above can combine arbitrarily, for making description succinct, not to above-mentioned reality
The all possible combination of each technical characteristic executed in example is all described, but, as long as the combination of these technical characteristics is not deposited
In contradiction, all it is considered to be the scope that this specification is recorded.
Embodiment described above only have expressed several embodiments of the present utility model, and it describes more concrete and detailed,
But therefore can not be interpreted as the restriction to utility model patent scope.It should be pointed out that, for the common skill of this area
For art personnel, without departing from the concept of the premise utility, it is also possible to make some deformation and improvement, these broadly fall into
Protection domain of the present utility model.Therefore, the protection domain of this utility model patent should be as the criterion with claims.
Claims (6)
1. a pulse-modulated signal receives system, it is characterised in that include automatic gain control amplifier, squarer, low pass
Wave filter, fixed pulse width decision device, trigger-type analog-digital converter and difference phase demodulation device；
The input input pulse formula 2DPSK modulated signal of described automatic gain control amplifier, described automatic growth control is put
The outfan of big device connects input and the signal input part of described trigger-type analog-digital converter of described squarer respectively, described
The outfan of squarer connects the input of described low pass filter, and the outfan of described low pass filter connects described fixing arteries and veins
Rushing the input of width decision device, the outfan of described fixed pulse width decision device connects described trigger-type analog-digital converter
Synchronizing to trigger input, the outfan of described trigger-type analog-digital converter connects the input of described difference phase demodulation device；
Described fixed pulse width decision device includes decision device and fixed pulse stretcher, and the outfan of described low pass filter is even
Connecing the input of described decision device, the outfan of described decision device connects the input of described fixed pulse stretcher, described solid
The outfan determining pulse stretcher connects the synchronization triggering input of described trigger-type analog-digital converter.
Pulse-modulated signal the most according to claim 1 receives system, it is characterised in that described difference phase demodulation device bag
Include the first shift register, the second shift register and phase comparator；
The outfan of described trigger-type analog-digital converter connects described first shift register, the of described first shift register
One outfan connects the input of described second shift register, the second outfan of described first shift register and described the
The outfan of two shift registers connects the input of described phase comparator respectively.
Pulse-modulated signal the most according to claim 2 receives system, it is characterised in that described phase comparator includes number
Word mlultiplying circuit, average obtain circuit and threshold value decision circuit；
Second outfan of described first shift register connects the first input end of described digital multiplying circuit, and described second moves
The outfan of bit register connects the second input of described digital multiplying circuit, and the outfan of described digital multiplying circuit connects
Described average obtains the input of circuit, and described average obtains the input of the outfan described threshold value decision circuit of connection of circuit
End.
Pulse-modulated signal the most as claimed in any of claims 1 to 3 receives system, it is characterised in that also include
Low-noise amplifier, the input of described low-noise amplifier inputs described pulsed 2DPSK modulated signal, and described low noise is put
The outfan of big device connects the input of described automatic gain control amplifier.
Pulse-modulated signal the most according to claim 4 receives system, it is characterised in that also include frequency-selecting filter, institute
The input stating frequency-selecting filter inputs described pulsed 2DPSK modulated signal, and the outfan of described frequency-selecting filter connects institute
State the input of low-noise amplifier.
Pulse-modulated signal the most according to claim 1 receives system, it is characterised in that described fixed pulse stretcher is
Monostable flipflop.
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| CN201620751779.5U CN205883257U (en) | 2016-07-13 | 2016-07-13 | Pulse modulation signal reception system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111158011A (en) * | 2020-01-06 | 2020-05-15 | 航天金鹏科技装备（北京）有限公司 | Pulse laser spot comprehensive test system and spot test method |
| CN112835315A (en) * | 2021-01-06 | 2021-05-25 | 苏州维嘉科技股份有限公司 | Device and method for controlling drilling depth of circuit board |
| CN114257257A (en) * | 2021-12-17 | 2022-03-29 | 清华大学深圳国际研究生院 | Multi-order peak detection pulse ultra-wideband receiver |
-
2016
- 2016-07-13 CN CN201620751779.5U patent/CN205883257U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111158011A (en) * | 2020-01-06 | 2020-05-15 | 航天金鹏科技装备（北京）有限公司 | Pulse laser spot comprehensive test system and spot test method |
| CN112835315A (en) * | 2021-01-06 | 2021-05-25 | 苏州维嘉科技股份有限公司 | Device and method for controlling drilling depth of circuit board |
| CN112835315B (en) * | 2021-01-06 | 2022-03-08 | 苏州维嘉科技股份有限公司 | Device and method for controlling drilling depth of circuit board |
| CN114257257A (en) * | 2021-12-17 | 2022-03-29 | 清华大学深圳国际研究生院 | Multi-order peak detection pulse ultra-wideband receiver |
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