CN104734673B - Burst changeable parameters signal generator and the burst signal generator that recurring number is variable - Google Patents
Burst changeable parameters signal generator and the burst signal generator that recurring number is variable Download PDFInfo
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Abstract
The invention discloses a kind of signal generators of changeable parameters of bursting, including clock unit, control unit, internal trigger unit and wave generating unit, the clock unit is used for generation system clock, the control unit is for receiving externally input N(N > 1) a different burst time interval, the internal trigger unit is used to generate N number of internal trigger signal according to N number of burst time interval and system clock；The wave generating unit is used for waveform of bursting according to N number of internal trigger signal generation.In order to solve the technical problem that burst time interval is fixed in the prior art, signal generator of the present invention can satisfy the demand that customer segment is burst, and multiple burst time intervals can be set, and export waveform of bursting according to the segmentation of each time interval.
Description
Technical field
The present invention relates to test fields of measurement, in particular to the signal generator of a kind of changeable parameters of bursting and a kind of circulation
The variable burst signal generator of number.
Background technique
Signal generator as a kind of signal source, because its can generate different frequency, different amplitudes rule or do not advise
Waveform then is widely used in the measurement of electronic system, verification and maintenance.With the hair that electronic chip is integrated
Exhibition is based on direct digital synthesizers (Direct Digital Synthesis, hereinafter referred to as DDS) technology and programmable logic array
(FPGA) signal generator of technology has function abundant, set function generator, arbitrary waveform generator, pulse generation
The functions such as device, harmonic oscillator, analog/digital modulator, frequency sweep generator, burst signal generator are.
It bursts function, also known as " train of pulse " function or " Burst " function, refers to when trigger signal is effective, export
The function of one or more waveforms, when using the function, burst time interval, circulation of bursting can be arranged in user according to demand
The parameters of bursting such as number, burst type, trigger source and triggering polarity.It is the schematic illustration for generating waveform of bursting, figure with reference to Fig. 1
Middle a is trigger signal, and it is that waveform of bursting is exported in the rising edge of trigger signal in figure that b, which is waveform of bursting,.Two of them are effective
Time interval T between trigger signal is burst time interval, and the number C of waveform is recurring number of bursting, and trigger source can be with
Outer triggering signal or internal trigger signal are selected, when selecting outer triggering signal, burst time interval is by external trigger
Signal deciding, when selecting internal trigger signal, burst time interval can be set by the user, existing burst signal generator
In, a burst time interval only can be set in user, i.e. burst time interval is constant, but in certain application environments,
Such as aircraft is monitored for radar, the reflection signal of aircraft is by remote and close or near and far, i.e., between burst time
Every being unfixed, therefore the function of bursting of existing signal generator is unable to satisfy the application environment of some complexity.And it is existing
Signal generator in, recurring number of bursting also is fixed and invariable, and is equally unable to satisfy many applications.
As stated above, lack a kind of burst time interval in the prior art and the variable signal of recurring number of bursting occurs
Device.
Summary of the invention
In order to solve the problems in the existing technology, the invention proposes a kind of generations of the signal of changeable parameters of bursting
Device.
The invention proposes a kind of signal generators of changeable parameters of bursting, including clock unit, control unit, internal trigger
Unit and wave generating unit, the clock unit are used for generation system clock, and the control unit is for receiving outside
N(N > 1 of input) a different burst time interval, the internal trigger unit is used for according between N number of burst time
Every generating N number of internal trigger signal with system clock；The wave generating unit is used to be produced according to N number of internal trigger signal
Raw waveform of bursting.
In signal generator of the present invention, the internal trigger unit can also include time counting unit, institute
The time counting unit stated is for counting burst time interval with system clock, when count is burst to one
Between when being spaced, generate one and recycled using system clock as the internal trigger signal of width with this, generate N number of different internal trigger letter
Number.
In signal generator of the present invention, the internal trigger unit can also include space-number control unit,
The space-number control unit is used to that the quantity at burst time interval to add up when the internal trigger signal is high level
1, until the quantity be equal to N-1, then the quantity is set 0 and added up again.
In signal generator of the present invention, it is single that the control unit can also receive the space-number control
The accumulated value that member generates, and according to the accumulated value, N number of burst time interval is successively sent to time counting unit.
In signal generator of the present invention, the signal generator can also include a circulation counting unit,
The control unit is also used to receive externally input M(M > 1) a different recurring number, the circulation counting unit is used for root
According to the M recurring number and internal trigger signal, cumulative enable signal is generated, the wave generating unit is tired out according to described
Enable signal is added to generate waveform of bursting.
In signal generator of the present invention, the circulation counting unit can also include that a recurring number control is single
Member, the recurring number control unit are used for when the internal trigger signal is high level, by the quantity of recurring number cumulative 1,
Until the quantity be equal to M-1, then the quantity is set 0 and added up again.
In signal generator of the present invention, the control unit can also include a storage unit, for depositing
Storage N number of different burst time interval and/or M different recurring number.
In signal generator of the present invention, the control unit can also include an input unit, for compiling
Collect N number of different burst time interval and/or M different recurring number.
In order to solve the problems in the existing technology, the invention also provides a kind of signal hairs that recurring number of bursting is variable
Raw device.
The invention proposes the burst signal generators that a kind of recurring number can be changed, including clock unit, control unit, interior touching
Bill member, circulation counting unit and wave generating unit, the clock unit are used for generation system clock, the control unit
For receiving externally input burst time interval and M different recurring numbers, the internal trigger unit is used for basis and bursts
Time interval and system clock generate internal trigger signal；The circulation counting unit is used for according to the M different circulations
Several and internal trigger signal, generates cumulative enable signal, and the wave generating unit is used for according to the cumulative enable signal
Generation is burst waveform.
In signal generator of the present invention, the circulation counting unit can also include that a recurring number control is single
Member, the recurring number control unit are used for when the internal trigger signal is high level, by the quantity of recurring number cumulative 1,
Until the quantity be equal to M-1, then the quantity is set 0 and added up again.
Compared with prior art, signal generator of the present invention, can be set multiple burst time intervals, and according to
Each time interval segmentation exports waveform of bursting, and can satisfy the demand that customer segment is burst, and can pass through display interface
On burst time Interval editing menu, realize Various Complex time interval setting, widened the application range for function of bursting.
And multiple and different recurring numbers can also be arranged in signal generator of the present invention, and output is burst, and recurring number is variable to burst
Waveform can also export burst time interval and the variable waveform of bursting of recurring number of bursting.
Detailed description of the invention
Fig. 1 is the schematic diagram of the waveform of bursting of signal generator output in the prior art.
Fig. 2 is the structural schematic diagram of signal generator 2 in the embodiment of the present invention 1.
Fig. 3 is the structural schematic diagram for the signal generator 2 that the embodiment of the present invention 1 has 203 detailed construction of internal trigger unit.
Fig. 4 is the structural schematic diagram for the signal generator 2 that the embodiment of the present invention 1 has circulation counting unit 205.
Fig. 5 is the work flow diagram of signal generator 2 in the embodiment of the present invention 1.
Fig. 6 is the schematic diagram of the variable waveform of bursting of the burst time interval that signal generator 2 exports and recurring number.
Fig. 7 is the structural schematic diagram of the signal generator 7 of the embodiment of the present invention 2.
Specific embodiment
Presently preferred embodiments of the present invention is introduced with reference to the accompanying drawing.
It is the reality at a kind of burst time interval proposed by the present invention and the variable signal generator 2 of recurring number with reference to Fig. 2
Example is applied, the signal generator 2 of embodiment 1 includes clock unit 201, control unit 202, interior wave generating unit 203 and triggering
Unit 204,
Clock unit 201 is used for generation system clock 210, provides work clock for each unit in signal generator 2,
Control unit 202 is for receiving externally input N(N > 1) a different burst time interval 211,
Internal trigger unit 203 is used to generate N number of internal trigger signal according to N number of burst time interval 211 and system clock 210
212；
Wave generating unit 204 is used for waveform 213 of bursting according to the generation of N number of internal trigger signal 212.
In the present embodiment, control unit 202 includes following functions: controlling function for realizing the system of signal generator 2
Can, for connecting externally measured instrument, network or the interface function of computer, and for the parameter input of human-computer interaction, system
The functions such as configuration.In the present embodiment, user can actual measurement need, pass through the display screen soft key for human-computer interaction
Hard manual on disk or signal generator panel inputs N number of different burst time interval.
In the present embodiment, internal trigger unit 203 is according to sequence set by user of bursting, successively according to N number of burst time
A burst time interval and system clock 210 in interval 211 generate an internal trigger signal 212, so recycle, and generate N
A different internal trigger signal 212, i.e. internal trigger unit 203 generate corresponding according to different burst time intervals 211
Different internal trigger signals 212 finally generates N number of different internal trigger signal.
In the present embodiment, wave generating unit 204 according to internal trigger unit 203 generate in order it is N number of it is different in
Trigger signal 212, segmentation generate waveform 213 of bursting, i.e., generate one section of waveform of bursting according to an internal trigger signal 212, finally
The waveform 213 of bursting of output is to burst what waveform was constituted with different burst time intervals by N sections.
In the present embodiment, wave generating unit 204 turns including phase accumulator 2041, wave memorizer 2042 and digital-to-analogue
Parallel operation 2043, phase accumulator 2041 be used for the frequency control word that is configured to control unit 202 and add up, and will obtain
Accumulated value 214 gives wave memorizer 2042, and wave memorizer 2042 is read address with accumulated value 214, reads data point, composition
Number waveform 215 of bursting is converted into simulation and burst after waveform 213 by the waveform 215 of bursting of digital form, digital analog converter 2043
Output
As an example, the control unit 202 in the present embodiment can be made of devices such as DSP, ARM or FPGA.
As an example, the phase accumulator in the internal trigger unit 203 and wave generating unit 204 in the present embodiment
2041 and wave memorizer 2042 can be made of FPGA device.
With reference to Fig. 3, in the present embodiment, internal trigger unit 203 includes time counting unit 2031, time counting unit
2031 for counting burst time interval 211 with system clock 210, when count to a burst time interval
When, generating one with system clock 210 is the internal trigger signal 212 of width, is recycled with this, and N number of different internal trigger letter is generated
Numbers 212.In the present embodiment, time counting unit 2031 in control unit 202 first from taking out in N number of burst time interval 211
A burst time interval, then with clock unit 201 generate system clock 210 counted, when count value from 0 be incremented by
When to the burst time interval, one is just generated using the pulse width of system clock 210 as the high level pulse signal of width, is made
For internal trigger signal corresponding with the burst time interval；Then time counting unit 2031 takes out from control unit 202 again
One burst time interval, the system clock 210 that reuse clock unit 201 generates is counted, when count value is incremented to this from 0
When burst time interval, just generate one using the pulse width of system clock 210 as the high level pulse signal of width, as with
The corresponding internal trigger signal in the burst time interval, and so on, it generates N number of corresponding with burst time interval 211 interior respectively
Trigger signal 212.
In the present embodiment, internal trigger unit 203 includes space-number control unit 2032, and space-number control unit 2032 is used
In when internal trigger signal 212 is high level, by the quantity at burst time interval 212 cumulative 1, until the quantity is equal to N-1, then
The quantity is set 0 to add up again.In the present embodiment, space-number control unit 2032 internal trigger signal 212 be high level when,
The controlling value 216 from 0 generated is added to 1, when internal trigger signal 212 next time is high level, then by controlling value 216
2 are added to from 1, and so on, when each internal trigger signal 212 is high level, controlling value 216 is burst with regard to cumulative 1 until being added to
The number N-1(of time interval, that is, N number of burst time interval), stop adding up, controlling value 216 is set 0, is added to N-1 again, such as
This circulation.When controlling value 216 is equal to the quantity N-1 at the burst time interval of user setting, that is, completes a cycle and burst
Controlling value 216 is set 0 by waveform again, that is, is started the waveform of bursting for exporting next cycle, so recycled, export multiple periods
Waveform of bursting.
In the present embodiment, control unit 202 receives the control accumulated value 216 that space-number control unit 2032 generates, and
According to the accumulated value 216, N number of burst time interval 211 is successively sent to time counting unit 2031.In the present embodiment,
When coming, the controlling value 216 that space-number control unit 2032 generates all adds up each internal trigger signal 212, control unit
202 according to the accumulated value, according to the sequence at the N number of burst time interval 211 of user setting, successively one by one by burst time interval
211 are sent to time counting unit 2031, and time counting unit 2013 generates corresponding according to the burst time interval received
Internal trigger signal.
With reference to Fig. 4, in the present embodiment, signal generator 2 further includes a circulation counting unit 205, and control unit 202 is also
For receiving externally input M(M > 1) a different recurring number 217, circulation counting unit 205 is used for according to M 217 He of recurring number
Internal trigger signal 212, generates cumulative enable signal 218, and wave generating unit 204 is burst according to the generation of cumulative enable signal 218
Waveform 213.It has been previously mentioned, waveform of bursting is several carrier waveforms to be exported, then recycling when internal trigger signal is effective
Several meanings is exactly the number in a burst time interval intercarrier waveform.In the present embodiment, including circulation counting unit 205
When trigger signal 212 is effective, from the recurring number taken out in control unit 202 in M recurring number, and generate cumulative enabled
Signal 218 gives wave generating unit 204, and wave generating unit 204 generates the load of a cycle according to cumulative enable signal 218
Wave signal, and circulation 205 1 pulse signals 219 of counting unit are fed back to, circulation counting unit 205 carries out the pulse signal 219
It counts, when count value reaches the value of the recurring number, then stops generating cumulative enable signal 218.Then, until next effective
Internal trigger signal 212 after, from the recurring number further taken out in control unit 202 in M recurring number, generate again effective
Cumulative enable signal 218, circulation executes above-mentioned step, variable sudden of final output burst time variable spaced, recurring number
Send out waveform.
As an example, circulation counting unit 205 includes a recurring number control unit, and recurring number control unit is for working as
When internal trigger signal 212 is high level, by the quantity of recurring number cumulative 1, until the quantity is equal to M-1(, that is, M recurring number), then
The quantity is set 0 to add up again.The pulse signal 219 that recurring number control unit generates wave generating unit 204 counts,
When count value reaches the value of the recurring number, then stop generating cumulative enable signal.Then, next effective internal trigger is waited until
After signal 212, from the recurring number further taken out in M recurring number in control unit 202, generating effective add up again makes
Can signal 218, repeatedly above step again, the variable waveform of bursting of output burst time variable spaced, recurring number.
In the present embodiment, control unit 202 further includes a storage unit, for storing described N number of different burst
Time interval and/or M different recurring number.
As an example, storage unit can be realized using volatile or nonvolatile storage.
In the present embodiment, control unit 202 further includes an input unit, for editing between N number of different burst time
Every and/or the different recurring numbers of M.In the present embodiment, there is burst time interval editor module and circulation in input unit
Number editor module, is respectively used to edit multiple burst time interval and recurring number.
As an example, input unit can be the display screen of signal generator 2, pass through the menu on display screen
Option enters burst time interval editor module and recurring number editor module, and user can be by keyboard or knob between burst time
It is edited every with recurring number.
It is the work flow diagram of signal generator 2 with reference to Fig. 5, illustrates signal generator in the present embodiment below with reference to Fig. 5
2 specific workflow.
501: 202 configuration parameter of control unit；
The function of bursting of enabling signal generator 2 first, and according to the parameter of bursting that needs to configure of measurement, control unit
202 before configuration parameter, first generates ' 0 ' enabled instruction, i.e., signal generator 2 will not generate waveform of bursting at this time；Deng
After control unit 202 all configures all parameters of bursting well, enabled instruction ' 1 ' is generated, signal generator 2 starts to generate at this time
It bursts waveform.
The parameter that control unit 202 needs to configure includes: the number N at burst time interval；The tool at N number of burst time interval
Body value；Trigger source parameter (internal trigger)；The occurrence of M recurring number, in the present embodiment, M=N；To wave generating unit 204
Frequency control word parameter and carrier waveform parameter etc..
502: internal trigger unit 203 generates internal trigger signal 212.
Internal trigger unit 203 is generated according to different burst time intervals 211 and system clock 210 between each burst time
Every corresponding different internal trigger signal 212, i.e., finally generate N number of different internal trigger signal.Concrete methods of realizing can join
Description above is examined, details are not described herein again.
503: circulation counting unit 205 generates cumulative enable signal 218.
Counting unit 205 is recycled after receiving effective internal trigger signal 212, M recurring number is taken out from control unit 202
In a recurring number, effectively cumulative enable signal 218 is generated, after next effective internal trigger signal 212, from control
A recurring number in M recurring number is further taken out in unit 202 processed, generates effectively cumulative enable signal 218, circulation again
Execute above-mentioned step, the variable waveform of bursting of final output burst time variable spaced, recurring number.Counting unit 205 is recycled to produce
The concrete methods of realizing of raw cumulative enable signal 218 can refer to description above, and details are not described herein again.
504: wave generating unit 204 generates waveform 213 of bursting according to cumulative enable signal 218.
As described above, wave generating unit 204 includes phase accumulator 2041, wave memorizer 2042 and digital-to-analogue conversion
Device 2043.When cumulative enable signal 218 is effective, phase accumulator 2041 adds up to frequency control word parameter, and gained is tired
Value added 214 give wave memorizer 2042, the read address as wave memorizer 2042.When cumulative enable signal 218 is effective,
The circulation of accumulated value 214 is incremented by, and using accumulated value 214 as read address, circulation exports prestored load from wave memorizer 2042
Wave waveform sampling point；When cumulative enable signal 218 is invalid, the value of accumulated value 218 is 0, and is remained unchanged, then wave memorizer
The value of 2042 outputs also remains unchanged, and is direct current signal.The spilling of phase accumulator 2041, it is meant that accumulated value 214 completes
A cycle is incremented by, i.e. the carrier signal of the output of wave memorizer 2042 a cycle；As the circulation of accumulated value 214 is passed
Increase, the number for the carrier signal that wave memorizer 2042 exports can follow the number of the carrier cycle of recurring number defined, finally
The burst signal of digital form is exported, then the burst signal of digital form is converted into analog form by digital analog converter 2043
Then burst signal exports.
With reference to Fig. 6, be burst time interval that signal generator 2 exports and recurring number it is variable burst waveform wherein
The schematic diagram of a part of waveform.It is divided into T1 between first burst time in figure, T2, first circulation are divided between the second burst time
Number is 2, and second circulation number is 4.
It is a kind of structural schematic diagram of the variable signal generator 7 of recurring number proposed by the present invention with reference to Fig. 7.Embodiment 2
Signal generator 7 include clock unit 701, control unit 702, internal trigger unit 703, circulation counting unit 705 and waveform produce
Raw unit 704, clock unit 701 are used for generation system clock 710, and control unit 702 is for when receiving externally input burst
Between the different recurring numbers 717 of 711 and M of interval, internal trigger unit 703 is used for according to burst time interval 711 and system clock
710 generate internal trigger signal 712；Counting unit 705 is recycled to be used for according to M different recurring numbers 717 and internal trigger signal 712,
Cumulative enable signal 718 is generated, wave generating unit 704 is used for waveform 713 of bursting according to the generation of enable signal 718 that adds up.
Embodiment 2 and the difference of embodiment 1 be only that, internal trigger unit 703 according only to one it is changeless burst when
Between interval generate the signal of an internal trigger, circulation counting unit 705 generates multiple cumulative enabled letters according to internal trigger signal
Numbers 718, final wave generating unit 704 generates the waveform 713 of bursting that only recurring number is variable.The reality of other units in embodiment 2
Existing method and in embodiment 1 essentially identical, can be cross-referenced.
Signal generator of the present invention is generated more by being counted with system clock to multiple burst time intervals
A internal trigger signal meets customer segment to realize the waveform of bursting for generating multistage according to different internal trigger signals
The demand burst, and multiple and different recurring numbers can also be set, output recurring number is realized by way of counting and burst
Time interval is variable, and the only variable waveform of bursting of recurring number, and can also be by display screen when bursting
Between interval and recurring number edit menu, realize Various Complex time interval and recurring number setting, widened answering for function of bursting
Use range.
Claims (9)
1. a kind of signal generator for changeable parameters of bursting, which is characterized in that including clock unit, control unit, internal trigger list
Member and wave generating unit,
The clock unit is used for generation system clock,
The control unit is used to receive a different burst time interval externally input N (N > 1),
The internal trigger unit includes time counting unit, when the time counting unit is used for system clock to bursting
Between be spaced and counted, when count is to a burst time interval, generate one using system clock as in width
Trigger signal is recycled with this, generates N number of different internal trigger signal；
The wave generating unit is used for waveform of bursting according to N number of internal trigger signal generation.
2. signal generator according to claim 1, which is characterized in that the internal trigger unit includes space-number control
Unit, the space-number control unit are used for when the internal trigger signal is high level, by the number at burst time interval
The quantity is then set 0 and added up again until the quantity is equal to N-1 by amount cumulative 1.
3. signal generator according to claim 2, which is characterized in that the control unit receives the space-number
The accumulated value that control unit generates, and according to the accumulated value, N number of burst time interval is successively sent to time counting
Unit.
4. signal generator according to claim 1, which is characterized in that the signal generator further includes a circulation
Counting unit, the control unit are also used to receive a different recurring number of externally input M (M > 1), the recurring number list
Member for according to the M recurring number and internal trigger signal, generating the enable signal that adds up, the wave generating unit according to
The cumulative enable signal generates waveform of bursting.
5. signal generator according to claim 4, which is characterized in that the circulation counting unit includes a recurring number
Control unit, the recurring number control unit are used for when the internal trigger signal is high level, by the quantity of recurring number
Cumulative 1, until the quantity is equal to M-1, then the quantity is set 0 and added up again.
6. signal generator according to claim 4, which is characterized in that the control unit further includes a storage list
Member, for storing N number of different burst time interval and/or M different recurring number.
7. signal generator according to claim 4, which is characterized in that the control unit further includes an input list
Member, for editing N number of different burst time interval and/or M different recurring numbers.
8. a kind of variable burst signal generator of recurring number, which is characterized in that including clock unit, control unit, internal trigger
Unit, circulation counting unit and wave generating unit,
The clock unit is used for generation system clock,
The control unit is used to receive externally input burst time interval and M different recurring numbers,
The internal trigger unit is used to generate internal trigger signal according to burst time interval and system clock；
The circulation counting unit is used to generate cumulative enabled letter according to the M different recurring numbers and internal trigger signal
Number,
The wave generating unit is used for waveform of bursting according to the cumulative enable signal generation.
9. signal generator according to claim 8, which is characterized in that the circulation counting unit includes a recurring number
Control unit, the recurring number control unit are used for when the internal trigger signal is high level, by the quantity of recurring number
Cumulative 1, until the quantity is equal to M-1, then the quantity is set 0 and added up again.
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| CN102204204A (en) * | 2011-05-20 | 2011-09-28 | 华为技术有限公司 | A method for realizing pulse synchronization and a device thereof |
| CN103095622A (en) * | 2011-11-01 | 2013-05-08 | 上海华虹集成电路有限责任公司 | Binary phase shift keying (BPSK) signal recovery circuit suitable for ISO14443 protocol |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102204204A (en) * | 2011-05-20 | 2011-09-28 | 华为技术有限公司 | A method for realizing pulse synchronization and a device thereof |
| CN103095622A (en) * | 2011-11-01 | 2013-05-08 | 上海华虹集成电路有限责任公司 | Binary phase shift keying (BPSK) signal recovery circuit suitable for ISO14443 protocol |
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