CN102788892B - A kind of digital oscilloscope for accurately triggering - Google Patents
A kind of digital oscilloscope for accurately triggering Download PDFInfo
- Publication number
- CN102788892B CN102788892B CN201110128582.8A CN201110128582A CN102788892B CN 102788892 B CN102788892 B CN 102788892B CN 201110128582 A CN201110128582 A CN 201110128582A CN 102788892 B CN102788892 B CN 102788892B
- Authority
- CN
- China
- Prior art keywords
- data
- trigger
- triggering
- accurate
- memorizer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The invention discloses a kind of digital oscilloscope for accurately triggering, including a digital filter, a trigger element, a data acquisition memory, a waveform interpolation device, a display unit, an accurate triggering memorizer, an accurate trigger interpolator, a control unit and a display unit, the described memorizer that accurately triggers is used for responding triggering signal, preserves trigger data；Described accurate trigger interpolator processes for the trigger data accurately triggered described in memorizer preservation performs interpolation of data, produces accurate trigger data；Described control unit, for according to described accurate trigger data, produces accurate trigger signal；Described display unit is for according to described accurate trigger signal, and signal waveform is measured in display.Digital oscilloscope of the present invention, utilizes and accurately triggers the original trigger data triggering the moment that memorizer preserves, solve after triggering is shifted out screen, it is impossible to the problem accurately triggered.
Description
Technical field
The present invention relates to digital oscilloscope field, lead particularly to the digital oscilloscope with digital triggering function
Territory.
Background technology
Along with the development of digital oscilloscope technology, because well solving during simulation triggers uncontrollable
Triggering jitter problem, digital triggering function has developed into one of Core Feature for digital oscilloscope.
The digital oscilloscope with digital triggering function generally comprises data acquisition unit, acquired data storage list
Unit, digital triggering unit, control unit and display unit etc., data acquisition unit is mainly used in gathering outside
Measured signal, and by its digitized generate digitized measurement signal, digital triggering unit the most also includes
Wave filter and trigger, wave filter, for being filtered digitized measurement signal, produces and is suitable for triggering
Trigger data, trigger, for the trigger condition exported according to described trigger data and described control unit, produces
The raw signal that triggers, collection data acquisition memory element stores digitized measurement signal in a looping fashion, and rings
Should produce video data by described triggering signal, described display unit generally includes display screen, for waveform
Mode presents described video data.
In the prior art, disclosed in there is the oscillograph of digital triggering function have multiple:
Such as, United States Patent (USP) US7072804 " Digital trigger filter for a real time
Digital oscilloscope (for the digital triggering wave filter of digital oscilloscope) " with reference to Fig. 1, public
Having opened a kind of digital oscilloscope with digital triggering function, this digital oscilloscope not only has digital triggering electricity
Road 24 is with thinking that data acquisition memorizer 25 provides triggering signal, it is achieved digital triggering function, also has one
The individual sampled data for exporting a/d converter 21 performs the digital filter 23 of filtering operation, this filtering
The essence of device 23 is high pass or the low pass filter of a fixed-bandwidth, and it can control list oscillographic
Under the control of unit, digitized measurement signal being performed filtering, filtering mode includes AC, DC, HF (high frequency
Suppression) and the mode such as LF (low frequency suppression), by using this wave filter can remove in input measurement signal
Some frequency content, the Trigger Function that can make its digital flip flop 24 is more stable.
The most such as, United States Patent (USP) US7610178 " Noise reduction filter for trigger
Circuit (for triggering the noise-reduction filter of circuit) ", as in figure 2 it is shown, do not only disclose one
Plant the digital oscilloscope with digital triggering function, also disclose a kind of noise filter for filtering noise
31, this wave filter 31 is used for being connected between above-mentioned digital filter 23 and digital flip flop 24,
For inputting the target signal filter noise of digital flip flop 24, in order to the stable work of digital flip flop 24,
Produce accurately and trigger signal.
The most such as, Chinese patent application CN201010618550.1 " has the digital oscillography of fine trigger function
Device ", with reference to Fig. 3, disclose a kind of digital oscilloscope with fine trigger function, it includes sampled data
Acquisition memory 11, display module 13, it is connected between data acquisition memorizer 11 and display module 13
Interpolater 12, this oscillograph also includes: by enumerator 14, viscous comparator 15 with finely trigger control
The 16 fine trigger elements constituted.Enumerator 14 therein, for inserting between two sampling numbers evidences
Interpolative data count, viscous comparator 15, for will sampling number according between insert interpolative data
Compare with a triggering level signal, and produce a triggering signal according to comparative result, finely trigger
Control module 16, when triggering signal for foundation and produce this triggering signal, the count results of enumerator 14,
Producing an accurate trigger signal, central control unit 17, for according to accurate trigger signal, fine setting display
The waveform display position of module 13.Digital oscilloscope disclosed in this invention can realize the essence of digital oscilloscope
Carefully trigger control, it is possible to reach substantially to reduce the effect triggering shake.
But, it is seen that, this accurate Trigger Function, can not be good be applied at digital oscilloscope
Triggering offset functions under RUN operator scheme.
The most above-mentioned problem, it is assumed that under oscillograph is in run pattern, complete
After waveform acquisition, the delay after the waveform in the pre-trigger stage before triggering moment h and triggering moment h is touched
The waveform in the stage of sending out length in data acquisition memorizer 11 is identical, in conjunction with reference to Fig. 4 a, when showing
The midpoint O of the storage depth k of the data acquisition memorizer 11 of ripple device is the reference zero triggering skew, in advance
The skew triggering direction is just, postpones the skew triggering direction for time negative.If, the oscillograph that user sets
Triggering skew when being zero, the video data S of described data acquisition memorizer 11 output will be deep with storage
Point centered by the midpoint O of degree k.On oscillographic display screen, trigger moment h and also can be positioned at screen
Central point, the length of pre-trigger data i of this video data S and delay trigger data j is equal；
With reference to 4b, when user's forward arranges triggering skew for triggering side-play amount T, trigger side-play amount T reach or
Exceed the forward two of storage depth k/for the moment, it is meant that the position triggering moment h is arranged at by user
In left-most position D of screen or beyond left-most position D of screen, at this moment, data acquisition memorizer 11
It is all to postpone trigger data j to data S of display module 13 output.Due to, in this case, data
Acquisition memory 11 export data S by do not comprise trigger moment h data, therefore, in prior art,
Trigger skew meet or exceed the forward two of storage depth k/for the moment when user's forward arranged, oscillograph without
The fine trigger position triggering moment h is sentenced by data S that method utilizes data acquisition memorizer 11 to export
Certainly.
According to same reason, when negative sense arranges triggering skew, there is also same situation, the most superfluous
State.
Summary of the invention
In order to solve problems of the prior art, the present invention proposes a kind of has accurate Trigger Function
Digital oscilloscope.
A kind of digital oscilloscope for accurately triggering, including:
One digital filter, for digitized measurement signal filtering, produces trigger data；
One trigger element, triggers signal for producing according to described trigger data；
One data acquisition memory, is used for responding described triggering signal, preserves described digitized measurement signal；
One waveform interpolation device, performs at interpolation of data for the measurement signal preserving described data acquisition memorizer
Reason, produces Waveform display signal；
One display unit, for according to described Waveform display signal, signal waveform is measured in display；
Also include,
One accurate triggering memorizer, is used for responding described triggering signal, preserves described trigger data；
One accurate trigger interpolator, performs in data for the trigger data preserving described accurate triggering memorizer
Insert and process, produce accurate trigger data；
One control unit, for according to described accurate trigger data, produces accurate trigger signal；
Described display unit, is additionally operable to according to described accurate trigger signal, the measurement signal waveform described in display.
Digital oscilloscope of the present invention, preserves the data in triggering moment by accurately triggering memorizer, solves
Determine in the case of triggering is shifted out screen, it is achieved the problem accurately triggered.
As an embodiment, in digital oscilloscope of the present invention, described accurately triggers memorizer,
Can be also used for circulation and store described trigger data, and respond described triggering signal, produce a section and trigger
Data；Described accurate trigger interpolator, it is also possible to for described section trigger data is performed at interpolation of data
Reason, produces accurate trigger data.
As an embodiment, in digital oscilloscope of the present invention, described accurate trigger interpolator,
Sub regions data in described section trigger data can also be performed interpolation of data to process, produce accurately
Trigger data.
As an embodiment, in digital oscilloscope of the present invention, described accurate trigger interpolator,
The region comprising 5-10 data in described section trigger data can also be performed interpolation of data to process, produce
The true trigger data of spermatogenesis.
As an embodiment, in digital oscilloscope of the present invention, described control unit, it is also possible to
For making described waveform interpolation device and described accurate trigger interpolator, it is alternately performed the interpolation of data behaviour of correspondence
Make.
As an embodiment, in digital oscilloscope of the present invention, described control unit, it is also possible to
For making a shared interpolater timesharing be used as described waveform interpolation device and described accurate trigger interpolator.
As an embodiment, in digital oscilloscope of the present invention, described shared interpolater is used as institute
When stating accurate trigger interpolator, its interpolation of data multiple is used as waveform interpolation device higher than described shared interpolater
Interpolation of data multiple.
As an embodiment, in digital oscilloscope of the present invention, described accurate triggering memorizer
Memory rate can be above the memory rate of described data acquisition memorizer, and described accurate triggering memorizer
Consistent memory bandwidth is kept with described data acquisition memorizer.
As an embodiment, in digital oscilloscope of the present invention, described accurate triggering memorizer
Memory rate can be with the memory rate of 2 times of described data acquisition memorizeies.
As an embodiment, in digital oscilloscope of the present invention, described shared interpolater, numeral
Wave filter and described accurate triggering memorizer can also be constituted by with a piece of programming device.
Digital oscilloscope of the present invention, is possible not only in the case of triggering is shifted out screen realize essence
Really Trigger Function, determine the position of fine triggering, but also have the following characteristics that
1, due to, oscillographic accurate triggering memorizer of the present invention may be used for preserving described digital filter
Output, filtered some frequency content after signal, therefore, oscillograph of the present invention has essence
Thin Trigger Function is more stable, reliable feature.
2, due to, oscillographic shared interpolater of the present invention, digital filter and accurately trigger memorizer can
To be made up of a piece of programming device, and, owing to described accurately triggers the data acquisition that memorizer is relatively more described
Collection memorizer have employed high speed storing technology, both ensure that the bandwidth of access data, and had decreased again data wire
Usage quantity, has saved resource for PLD, reduces oscillographic cost.
3, due to, oscillograph of the present invention can pass through one shared interpolater of multiplexing, and timesharing realizes described ripple
Shape interpolater and the interpolation of data function of described accurate trigger interpolator, saved hardware resource, dropped further
Low oscillographic cost；
4, due to, oscillograph of the present invention can realize two different interpolations by one shared interpolater of multiplexing
The function of device, and, when shared interpolater is for described accurate trigger interpolator, interpolation of data multiple is permissible
It is used as interpolation of data multiple during waveform interpolation device, in this case, oscillography of the present invention higher than it
Utensil has finer triggering precision.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of digital oscilloscope with digital triggering function of the prior art.
Fig. 2 is the structural representation of a kind of digital oscilloscope with noise filter function of the prior art.
Fig. 3 is the structural representation of a kind of digital oscilloscope with fine trigger function in prior art.
Fig. 4 a is the explanatory diagram of fine trigger function in prior art.
Fig. 4 b be in prior art fine trigger function further illustrate figure.
Fig. 5 is the structural representation of the digital oscilloscope in present pre-ferred embodiments.
Fig. 6 is the side that the digital oscilloscope in invention preferred embodiment judges the actual trigger position of measured signal
Method explanatory diagram.
Detailed description of the invention
Introduce a better embodiment of the present invention below in conjunction with the accompanying drawings.
Refer to Fig. 5, in better embodiment of the present invention, for the numeral of accurate Trigger Function
Oscillograph includes a data acquisition unit 501, a data acquisition memory 502, a waveform interpolation
Device 503, a display unit 504, a digital filter 505, a trigger element 506, an essence
Really trigger memorizer 507, an accurate trigger interpolator 508 and a control unit 509.
Data acquisition unit 501 is used for gathering measured signal, and this signal carries out analog digital conversion, exports number
Collection data a of word；
Digital filter 505 under the control of control unit 509, to gather data a carry out high frequency,
Low frequency, AC or DC filter, and produce trigger data d being suitable to trigger；
Trigger element 506, under the control of control unit 509, produces according to trigger data d and triggers letter
Number e；
Data acquisition memorizer 502 is used for circulating storage and gathers data a, and is used for responding triggering signal e generation
Storage data b；
Waveform interpolation device 503, for storage data b are carried out interpolation of data process, produces and shows for waveform
Video data c, the display unit 504 video data c described in show with wavy manner；
Accurately triggering memorizer 507 and be used for when triggering signal e and arriving, storage triggers before and after the moment
The trigger data of section；
Accurately trigger interpolator 508 is for comprising the actual triggering moment by accurately trigger that memorizer 507 exports
Front and back the trigger data of one piece of data carries out interpolation process, produces accurate trigger data f；
Control unit 509 is additionally operable to produce accurate trigger signal g according to accurate trigger data f；
Display unit 504 is for according to accurate trigger signal g, adjusting the triggering of the waveform representing video data c
Position.
Further, in the present embodiment, data acquisition unit 501 includes two Measurement channel, each survey
Amount passage all includes an analog to digital conversion circuit ADC, for gathering the measured signal of outside, and is converted
For digital signal；Data acquisition unit 501 can also include an intertexture controller, and this intertexture controller is used
In opening situation according to each passage, the output data of analog to digital conversion circuit ADC are combined accordingly
Arrangement operation, such as, if oscillograph is operated in the case of the dual pathways works alone, now interweave control
Device is in non-interwoven state, and the data of each passage are directly exported to each self-corresponding data by intertexture controller
Acquisition memory；And, if in the case of oscillograph is operated in single channel work, now interweave controller
May be at interleaved order, make the analog to digital conversion circuit ADC of two passages letter to be measured simultaneously to a passage
Number carry out data acquisition, then, the number that intertexture controller can collect according to two analog to digital conversion circuit ADC
According to time relationship or phase relation, carry out interleaving or assembled arrangement of data, generate final for exporting
Collection data a.Therefore, in the present embodiment, the sample rate of the service aisle under interleaved order is permissible
It it is the twice under non-interleaved order.In the present embodiment, in order to realize sample rate at a high speed, each passage
Analog to digital conversion circuit ADC can also be made up of multiple analog to digital conversion circuit ADC, by these analog digital conversion electricity
Road ADC time sharing sampling and intertexture control can realize higher sample rate.
In the present embodiment, digital filter 505 can receive the collection number of data acquisition unit 501 output
According to a, it is carried out high frequency, low frequency, AC or DC filtering etc. and processes, produce trigger data d, digital filtering
The implementation method of device 505 has multiple, is not repeating.
In the present embodiment, trigger element 506 includes a digital comparator and a trigger decoder,
Under the control of control unit 509, digital comparator may be used for trigger data d and predetermined triggering electricity
Putting down and compare, result of the comparison is given trigger decoder the most again, trigger decoder is then for controlling
Under the control of unit 509, the output result of described comparator is processed and triggers judgement, such as performs
Pulsewidth calculating, edge judgement etc., when described be judged as meeting trigger condition time, make trigger element 506 produce
Trigger signal e.In the present embodiment, it is achieved the concrete grammar of trigger element 506 and circuit can use many
Plant specific design scheme, do not repeating.
In the present embodiment, data acquisition memorizer 502 can be a high-speed circulating memorizer, in data
When gathering beginning, data acquisition memorizer 502 starts sequentially to store collection data from the beginning address of memorizer
A, has reached the end addresses in data acquisition memorizer 502 when preserving the storage address gathering data a
Time, data acquisition memorizer 502 will start new round circulation storage in address the most from the outset, new preserving
While one takes turns collection data a obtained in circulation storage, override in data acquisition memorizer 502 and protected
Old collection data a deposited, so move in circles.When receiving the triggering signal from trigger element 506
During e, data acquisition memorizer 502 just, under the control of control unit 509, automatically saves predetermined quantity
Data after the triggering of data and scheduled volume before triggering, as storage data b output.
In the present embodiment, waveform interpolation device 503 can use Sync interpolation, for depositing data acquisition
Storage data b of reservoir 502 output perform interpolation of data computing, to realize waveform amplification on a timeline.
When base resolution is less than waveform sampling rate at that time, waveform interpolation device 503 is operated in direct mode operation, not to storage
Data b do interpolative operation, direct output display data c.When base resolution is higher than waveform sampling rate at that time,
Waveform interpolation device 503 according to user specify time base corresponding to interpolation multiple to data acquisition memory 502
Storage data b of output carry out real time data interpolation, described interpolation of data is to storing the total of data b
Perform interpolation of data according to the data of bandwidth range, generate video data c, in order to meet different display requirements,
Such as oscillograph current demand under run and stop state；
In the present embodiment, when waveform interpolation device 503 performs interpolation of data to storage data b, described control
Unit 509 processed can automatically according to time base facilities control described waveform interpolation device 503 select correspondence
Interpolation of data multiple, generates video data c.When base resolution is relatively low at that time, select less interpolation multiple,
Insert less data, when base resolution is higher at that time, selects bigger interpolation multiple, insert more number
According to, in order to form finer video data c.
In the present embodiment, accurately triggering memorizer 507 can be by a programmable device FPGA
Storage depth is that the internal memory of 1k realizes.In order to save the resource of programmable device FPGA, less account for
With data wire, accurately trigger the data wire shared by memorizer 507 and be only the number of data acquisition memorizer 502
According to the half of line, but, have identical in order to make accurately to trigger memorizer 507 with data acquisition memorizer 502
Data bandwidth, accurately triggering the memory rate that memorizer 507 used is data acquisition memorizer 502
2 times.
In the present embodiment, accurately trigger memorizer 507 to can be used to circulation storage digital filter 505 and send
Trigger data d come, and, when receiving the triggering signal e that trigger element 506 is sent here, accurately trigger
Memorizer 507 will stop datacycle storage operation.Due to, trigger element 506 judge trigger condition,
Output triggers signal e needs the consuming time, therefore, accurately triggers memorizer 507 and receives triggering signal e
Time can trigger later than reality the moment occurs, therefore, stop circulation depositing accurately triggering memorizer 507
During storage operation, it is saved in and accurately triggers trigger data d in memorizer 507, reality can be contained with regard to natural
Trigger data d of a period of time before and after the generation of triggering moment.To preserve accurately triggering memorizer 507
Contain the actual triggering moment occur before and after a period of time trigger data d output after, accurately trigger storage
Device 507 can start new circulation storage operation again, starts again at circulation storage digital filter 505
Trigger data d sent here.
In the present embodiment, described digital oscilloscope also includes an accurate trigger interpolator 508, due to,
Oscillographic display and triggering work are the Serial Relation having precedence in time, at display process, ripple
Shape interpolater 503, for storage data b are carried out Sync interpolation, generates video data c；Trigger fine
During, accurate trigger interpolator 508 is for comprising the triggering moment to accurately triggering memorizer 507 output
The data of one section of trigger data front and back carry out SYNC interpolation process, generate accurate trigger data f.
Theoretically, accurate trigger interpolator 508 need the corresponding actual previous sampled point triggering the moment and
Data between later sampled point perform interpolation of data, can realize finely triggering judgement work, but actual
In the case of, in addition it is also necessary to consider that boundary condition and the performance by accurate trigger interpolator 508 are limited, in this reality
Executing in example, interpolation of data length is more than two sampled points, is that reality triggers 7-8 sampled point before and after the moment
Carry out Sync interpolative operation, produce accurate trigger data f.
After accurate trigger interpolator 508 produces accurate trigger data f, control unit 509 can be according to essence
Really trigger data f produces an accurate trigger signal g, and exports this to display unit 504 and accurately trigger letter
Number g.The time base situation and sample rate situation that display unit 504 will set according to user, decides whether to use
Finely triggering, when employing finely triggers, display unit 504 will offset and essence according to the triggering that user sets
Really trigger signal g, adjust shown trigger position corresponding to waveform.
In the present embodiment, in order in accurate trigger data f of interpolation of data, draw more accurate
Trigger position, control unit 509 also includes an accurate trigger module, wherein accurately in trigger module
Including enumerator, viscous comparator, triggering level depositor and accurate trigger control unit, enumerator is used
The interpolative data inserted in accurate trigger data f counts；Viscous comparator for by sampled point it
Between insert interpolative data and a triggering level signal compare, control unit 509 will compare according to this
The comparative result of device output and the described enumerator count results when producing this comparative result, produce and accurately touch
Signalling g.In conjunction with reference to Fig. 5, Fig. 6, it is assumed that, in the 7th between sampled point A and sampled point B
Inserting some C, described viscous comparator produces comparison signal, and control unit 509 receives this comparison signal and meter
After the count results of number device, accurate trigger signal g will be produced, and this accurate trigger signal g is exported extremely
Display unit 504.After display unit 504 receives accurate trigger signal g, will be according to accurate trigger signal
The triggering calculations of offset that g and user set goes out an accurate trigger position, makes the trigger position of display waveform adjust
Accurate in this accurate trigger position.
In the present embodiment, with reference to Fig. 5, in order to, under STOP state, display unit 504 can be shown by user
The waveform shown be deployed into need perform interpolative data time base time, waveform also is able to show exactly, this enforcement
Oscillograph described in example, need not fine trigger data time base in the case of, it is also desirable to carry out complete essence
Carefully trigger calculating, i.e. often when receiving the triggering signal e that trigger element 506 is sent here, accurately trigger storage
Device 507 will respond this triggering signal, stops datacycle storage, contains the actual triggering moment under preservation
Trigger data d of a period of time before and after generation.Often produce this actual triggering moment at accurately triggering memorizer 507
Before and after generation during trigger data d of a period of time, accurate trigger interpolator 508 is just to the actual triggering in data
7-8 data near moment perform interpolation of data, generate accurate trigger data f.Often accurately touch described
Send out interpolater 508 when generating accurate trigger data f, control unit 509 all must according to this accurate trigger data f,
Generate accurate trigger signal g.
In the present embodiment, turn owing to reality triggering signal to perform modulus through data acquisition unit 501
Change, the control that interweaves, digital filter 505 perform coupling filter, and trigger element 506 performs numeral
If after the dry runs such as viscous compares, triggering control and the decoder module of trigger element 506 just can be come, therebetween
Creating certain process time delay, but this time delay is fixing, therefore, trigger element 506 produces and triggers
After signal e, control unit 509 can utilize the time of origin of this triggering signal e to reduce this constant time lag,
Calculating the triggering moment of reality, accordingly, control unit 509 is possible not only to control data acquisition memorizer 502
Obtain and trigger moment corresponding storage data b with actual, it is also possible to by accurately triggering memorizer 507,
Accurately trigger interpolator 508, obtains accurate trigger data f corresponding with the actual triggering moment, and foundation
This accurate trigger data f and described constant time lag, calculate the more accurate actual triggering moment, produce
Accurate trigger signal g.The more accurate actual triggering time information provided according to accurate trigger signal g,
Reducing waveform jitter phenomenon, the waveform making display unit 504 export is more stable.
As an example, the oscillograph described in this enforcement can be single channel oscillograph, it is also possible to be to have
More multichannel multitrace oscilloscope, e.g., four-track oscilloscope.In multitrace oscilloscope, each Measurement channel
One can be included by accurately triggering memorizer 507, accurate trigger interpolator 508 and control unit 509
The fine trigger module constituted, triggers for fine.
As an example, accurately trigger the storage depth of memorizer 507, can be according to triggering signal e
Arrive depending on accurately triggering the delay time needed for memorizer 507, when delay time is longer, accurately trigger and deposit
The storage depth of reservoir 507 is accomplished by bigger, in order to accurately triggers memorizer 507 and is receiving triggering signal
E, when stopping circulation storage operation, in its internal data preserved, it is ensured that the actual triggering moment included
Trigger data d of one section front and back.
As an example, in the present embodiment, digital filter 505 can also include for eliminating
The filter circuit of signal noise.
As an example, in the present embodiment, accurately triggering memorizer 507 is to utilize in programming device
Internal memory realize, in order to save the resource of programming device, make it possible to do more thing, also
Can be accurately to trigger memorizer 507 to select less data line, and by making accurately to trigger memorizer
The higher method of memory rate of 507, makes accurately to trigger memorizer 507 and data acquisition memory 502 is protected
Hold consistent data transfer bandwidth.Certainly, in the case of aboundresources, accurately trigger memorizer 507 also
The data line identical with data acquisition memorizer 502 and data storage rate can be used.
As an example, in the present embodiment, control unit 509 can be same by multiplexing at times
Shared interpolation unit realizes waveform interpolation device 503 and accurate trigger interpolator 508, thus has reached to save firmly
The purpose of part resource.Two independent interpolaters can also be used to constitute accurate trigger interpolator 508 and ripple
Shape interpolater 503.
As an example, the one piece of data before and after reality can be triggered the moment by accurate trigger interpolator 508
Carrying out interpolative operation, concrete interpolative data length can select according to system requirements, such as to reality
Before and after trigger position, 7-8 data carry out interpolation, it is also possible to be to 6 data before and after the reality triggering moment,
Or 9 to 10 data perform interpolation of data.
As an example, waveform interpolation device 503, accurate trigger interpolator 508, digital filter 505 and
Accurately triggering memorizer 507 can use independent a piece of programming device to constitute, e.g., by FPGA or CPLD etc.
Device is constituted, and the volume making digital oscilloscope is less.
As an example, when waveform interpolation device 503 and accurate trigger interpolator 508 are by control unit 509 points
When the same shared interpolation unit of time period multiplex realizes, described shared interpolater, digital filter 505 and
Accurately triggering memorizer 507 can use independent a piece of programming device to constitute, e.g., by FPGA or CPLD etc.
Device is constituted.
In the present embodiment, when the triggering that user sets is shifted out screen, control unit 509 is the most permissible
Utilize and accurately trigger memorizer 507, accurate trigger interpolator 508, confirm to trigger the moment with reality corresponding
Accurate trigger data f, produce accurate trigger signal g so that display unit 504 still can be according to accurately
Trigger the triggering skew of signal g and user's setting, be accurately determined the trigger position that waveform shows.
In the present embodiment, owing to accurately triggering trigger data d that memorizer 507 preserves, it is to have passed through numeral
The data of wave filter 505 Filtering Processing, have filtered some frequency content gathered in data a, especially
It is when digital filter includes noise filter circuit, also includes having filtered the noise letter gathered in data a
Number composition.Make accurate trigger data f produced subsequently have reliable and stable feature, make of the present invention
Oscillographic fine trigger function is more stable, reliable.
The above-described specific embodiment being only the present invention, the protection domain being not intended to limit the present invention,
All within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. done, all should wrap
Within being contained in protection scope of the present invention.
Claims (10)
1. for the digital oscilloscope accurately triggered, including:
One digital filter, for digitized measurement signal filtering, produces trigger data；
One trigger element, triggers signal for producing according to described trigger data；
One data acquisition memory, is used for responding described triggering signal, preserves described digitized measurement signal；
One waveform interpolation device, performs at interpolation of data for the measurement signal preserving described data acquisition memorizer
Reason, produces Waveform display signal；
One display unit, for according to described Waveform display signal, signal waveform is measured in display；
It is characterized in that: also include,
One accurate triggering memorizer, is used for responding described triggering signal, preserves described trigger data；
One accurate trigger interpolator, performs in data for the trigger data preserving described accurate triggering memorizer
Insert and process, produce accurate trigger data；
One control unit, for according to described accurate trigger data, produces accurate trigger signal；
Described display unit, is additionally operable to according to described accurate trigger signal, the measurement signal waveform described in display.
Digital oscilloscope the most according to claim 1, it is characterised in that
Described accurately triggers memorizer, is used for circulating the described trigger data of storage, and responds described triggering signal,
Produce a section trigger data；
Described accurate trigger interpolator, processes for described section trigger data is performed interpolation of data, produces accurately
Trigger data.
Digital oscilloscope the most according to claim 2, it is characterised in that described accurate trigger interpolator,
Sub regions data in described section trigger data are performed interpolation of data process, produce and accurately trigger number
According to.
Digital oscilloscope the most according to claim 2, it is characterised in that described accurate trigger interpolator,
The region comprising 5-10 data in described section trigger data is performed interpolation of data process, produce accurately
Trigger data.
5. according to the digital oscilloscope described in claim 3 or 4, it is characterised in that: described control unit, use
In making described waveform interpolation device and described accurate trigger interpolator, it is alternately performed the interpolation of data operation of correspondence.
6. according to the digital oscilloscope described in claim 3 or 4, it is characterised in that: described control unit, use
It is used as described waveform interpolation device and described accurate trigger interpolator in making a shared interpolater timesharing.
Digital oscilloscope the most according to claim 6, it is characterised in that: described shared interpolater is used as institute
When stating accurate trigger interpolator, its interpolation of data multiple is used as waveform interpolation device higher than described shared interpolater
Interpolation of data multiple.
Digital oscilloscope the most according to claim 7, it is characterised in that: described accurate triggering memorizer
Memory rate is higher than the memory rate of described data acquisition memorizer, and described accurate triggering memorizer and described
Data acquisition memorizer keeps consistent memory bandwidth.
Digital oscilloscope the most according to claim 8, it is characterised in that: described accurate triggering memorizer
The memory rate of the described data acquisition memorizer of memory rate 2 times.
10. according to the digital oscilloscope described in claim 7,8 or 9, it is characterised in that: described shared interpolation
Device, digital filter and described accurate triggering memorizer are constituted by with a piece of programming device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110128582.8A CN102788892B (en) | 2011-05-18 | 2011-05-18 | A kind of digital oscilloscope for accurately triggering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110128582.8A CN102788892B (en) | 2011-05-18 | 2011-05-18 | A kind of digital oscilloscope for accurately triggering |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102788892A CN102788892A (en) | 2012-11-21 |
| CN102788892B true CN102788892B (en) | 2016-09-07 |
Family
ID=47154349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110128582.8A Active CN102788892B (en) | 2011-05-18 | 2011-05-18 | A kind of digital oscilloscope for accurately triggering |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102788892B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103048508B (en) * | 2012-12-06 | 2016-03-16 | 深圳市鼎阳科技有限公司 | Improve the method for digital oscilloscope activation levels precision, device and digital oscilloscope |
| CN103869120A (en) * | 2012-12-13 | 2014-06-18 | 北京普源精电科技有限公司 | Oscilloscope with fine equivalent triggering function and method for fine equivalent triggering |
| CN103353543B (en) * | 2013-05-30 | 2015-06-24 | 电子科技大学 | Digital oscillator with functions of triggering and decoding serial protocols |
| CN104280586A (en) * | 2014-09-04 | 2015-01-14 | 安徽华盛科技控股股份有限公司 | Oscilloscope with storing function |
| CN104535815B (en) * | 2014-12-16 | 2017-08-25 | 北京航天测控技术有限公司 | A kind of digital two-stage combination trigger signal extracting method |
| US10365300B2 (en) * | 2016-02-05 | 2019-07-30 | Tektronix, Inc. | Trigger on final occurrence |
| CN107515325B (en) * | 2017-07-03 | 2019-09-10 | 深圳市鼎阳科技有限公司 | A kind of oscillograph rolling triggering |
| CN109765412B (en) * | 2018-12-28 | 2021-06-01 | 中电科思仪科技股份有限公司 | Method for accurately positioning trigger position based on programmable circuit |
| CN110108916B (en) * | 2019-05-27 | 2021-03-16 | 西安交通大学 | Synchronous trigger device with multistage digital delay function and trigger method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1241723A (en) * | 1998-04-03 | 2000-01-19 | 特克特朗尼克公司 | Non-linearity corrections for digital oscilloscope with variable intensity rasterization |
| US6753677B1 (en) * | 2003-02-28 | 2004-06-22 | Agilent Technologies, Inc. | Trigger jitter reduction for an internally triggered real time digital oscilloscope |
| US7072804B2 (en) * | 2004-09-28 | 2006-07-04 | Agilent Technologies, Inc. | Digital trigger filter for a real time digital oscilloscope |
| CN201508381U (en) * | 2009-07-21 | 2010-06-16 | 北京普源精电科技有限公司 | Digital oscilloscope with video triggering function |
| CN102053186B (en) * | 2009-11-10 | 2014-08-20 | 北京普源精电科技有限公司 | Digital oscilloscope with variable-order digital filter |
-
2011
- 2011-05-18 CN CN201110128582.8A patent/CN102788892B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN102788892A (en) | 2012-11-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102788892B (en) | A kind of digital oscilloscope for accurately triggering | |
| CN107145468B (en) | Signal generating and reading device and control method | |
| CN1178114C (en) | Electric-wave-shape digital sampling method and apparatus thereof | |
| CN101666834B (en) | Industrial frequency-harmonic interference resistant signal sampling method and system | |
| EP2343557B1 (en) | Dynamic oscilloscope triggering | |
| CN110166046B (en) | Sequential equivalent sampling system based on phase delay | |
| CN100529772C (en) | Power network overvoltage signal frequency conversion sampling method | |
| CN103901243B (en) | A kind of oscillograph with high triggering precision | |
| CN109655644B (en) | Method and device for reducing random wave signal output jitter | |
| WO2015110150A1 (en) | Digital measurement input for an electric automation device, electric automation device comprising a digital measurement input, and method for processing digital input measurement values | |
| CN104297543A (en) | Hybrid oscilloscope with channel synchronization function | |
| CN109765412A (en) | A method of the accurate positioning trigger position based on programmable circuit | |
| CN100508102C (en) | Langmuir probe plasma diagnostic method based on virtual instrument | |
| CN104007300B (en) | Digital fluorescence oscilloscope stochastical sampling disturbs circuitry phase method for designing | |
| CN103048506B (en) | Method for calibrating data merging sequences of parallel acquisition system | |
| CN110887984A (en) | Digital oscilloscope supporting eye pattern reconstruction | |
| DE102009038705A1 (en) | Mass spectrum generating method for mass spectrometer, involves summing synthesized samples with temporally-aligned accumulated samples to produce mass spectrum, where accumulated samples are obtained from mass scan signals | |
| CN101764614B (en) | V-shaped sampling method of AD converter based on FPGA | |
| CN207571261U (en) | A kind of system for signal acquisition in integrated circuit testing | |
| CN102957643B (en) | A kind of triggering catching method of broadband signal and device | |
| CN102735946B (en) | Method for eliminating interference during signal sampling | |
| CN105678072B (en) | A kind of method for reducing electronic mutual inductor error under message effect of jitter | |
| CN108982967A (en) | A kind of network of ship parameter real time monitoring system and method | |
| CN103616563B (en) | A kind of open type spectrometer receiving channel extension system | |
| CN109556741B (en) | Sensor data processing method and intelligent temperature sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |