CN207601127U - A kind of oscilloprobe and oscillograph - Google Patents
A kind of oscilloprobe and oscillograph Download PDFInfo
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- CN207601127U CN207601127U CN201721392600.2U CN201721392600U CN207601127U CN 207601127 U CN207601127 U CN 207601127U CN 201721392600 U CN201721392600 U CN 201721392600U CN 207601127 U CN207601127 U CN 207601127U
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Abstract
The utility model is related to a kind of oscilloprobe and oscillograph, the oscilloprobe includes：Probe entry port, comparator module, D/A converter module and output terminal；Measuring signal is transferred to after comparator module is handled by the probe entry port to be exported to the D/A converter module, and the output terminal is by the transformed analog signal output of the D/A converter module to the analog channel of oscillograph.Using, only with shared analog channel and shared flow chart of data processing, not only saving design cost, while can easily also complete logic analysis function and the function of oscillograph inside the oscilloprobe and its oscillograph of the utility model.
Description
Technical field
The utility model belongs to instrument field, and in particular to a kind of oscilloprobe and oscillograph.
Background technology
In the middle and high-end market of present oscillograph, most of function of being all integrated with logic analyser becomes and shows tool
There is the oscillograph of logic analysis function.The designing scheme of this oscillograph is substantially：Oscillograph and logic analyser use each
From independent interface, that is to say, that the interface for having its independent logic analyser funtion part so that each logic analysis
The channel of instrument occupies an I/O port or a pair of low-voltage differential signal transmission LVDS I/O.Therefore on the market it is common have patrol
The oscillograph for collecting analytic function usually has 2,4 or 8 analog channels and several digital channels, to ensure at data
It is independent for the data in the data and analog channel in the digital channel of logic analysis during reason.That is
When handling data, the data of logic analysis channel and the data of analog channel are independent data flows.But
It is that method needs to occupy bigger space and I/O resource, workload used by middle and high end oscillograph of the prior art
It is bigger, and the development cost of product is substantially increased, it is not appropriate for the demand of most of common survey occasion.
Utility model content
In view of the above-mentioned problems, the purpose of this utility model is to provide a kind of oscilloprobe and oscillograph.
To achieve the above object, the utility model takes following technical scheme：
A kind of oscilloprobe of the utility model, including：Probe entry port, comparator module, D/A converter module with
And output terminal；Measuring signal is transferred to after comparator module is handled and exports to the digital-to-analogue conversion by the probe entry port
Module, the output terminal is by the transformed analog signal output of the D/A converter module to the analog channel of oscillograph.
Above-mentioned oscilloprobe, it is preferred that the output terminal further comprises：Cable and BNC out splice going splices, the BNC
Out splice going splice connects the BNC input adapters of the analog channel, and the analog signal passes sequentially through the cable and BNC outputs
Connector is exported to the BNC input adapters of the analog channel.
Above-mentioned oscilloprobe, it is preferred that the cable progress one includes：Signal core, ground connection core, supply voltage line
Core and reference voltage core.
Above-mentioned oscilloprobe, it is preferred that the comparator module further comprises：Reference voltage unit, comparing unit
And output unit, the reference voltage unit Memory Reference voltage, the comparing unit measuring signal and base
The size of quasi- voltage, and comparison result is exported by the output unit to the D/A converter module.
Above-mentioned oscilloprobe, it is preferred that the D/A converter module is：High-speed A/D converter or resistor network.
Above-mentioned oscilloprobe, it is preferred that the probe entry port includes several digital channels.
A kind of oscillograph disclosed in the utility model, including：Oscilloprobe, analog channel and modulus as described above
Modular converter, the analog signal transmission that the analog channel exports the oscilloprobe give the analog-to-digital conversion module, institute
It states after analog-to-digital conversion module is handled by the oscilloscope display.
Above-mentioned oscillograph, it is preferred that the oscillograph further includes：BNC input adapters, the BNC for connecting the output terminal are defeated
Go out connector.
The probe of oscillograph and oscillograph in the utility model, by changing internal structure and using shared simulation
Channel and shared flow chart of data processing not only save design cost, at the same can easily also complete logic analysis function with
And the function of oscillograph.
Description of the drawings
Fig. 1 is the structure diagram of a kind of oscilloprobe that the utility model embodiment is provided.
Specific embodiment
The utility model is described in detail with reference to the accompanying drawings and examples.
The utility model embodiment provides a kind of oscilloprobe, as shown in Figure 1, the probe includes：Probe entry port
101st, comparator module 102, D/A converter module 103 and output terminal 104；The probe entry port 101 passes measuring signal
It is defeated handled to comparator module 102 after export to the D/A converter module 103, the output terminal 104 is by the digital-to-analogue
103 transformed analog signal output of modular converter is to the analog channel (not shown) of oscillograph.In specific embodiment, probe is defeated
Enter the input terminal that end 101 is similar to traditional logic analyser, there is the digital channel that can receive digital signal, measuring signal
Comparator module 102 is input to by probe entry port 101 to be handled, then by D/A converter module 103 by comparator mould
The data that block 102 exports are sampled and digital-to-analogue conversion is into after analog signal, are exported to the analog channel of oscillograph.Existing skill
The digital channel of oscillograph and analog channel are independent input and independent flow chart of data processing in art, and the utility model is real
Example is applied unlike the prior art, only with shared analog channel and shared data processing stream inside oscillograph
Journey not only saves design cost, while can easily also complete logic analysis function and the function of oscillograph.
Preferably, probe entry port includes N number of digital channel, digital channel number N can be according to rear end analog channel
The resolution ratio and noise margin range of analog-to-digital conversion module ADC determines, such as the ADC resolution ratio of analog channel is 8bit, is had
256 ranks, then digital channel number N is proper for 4 channels, but the utility model embodiment is not limited to 4 channels.
The oscilloprobe that the utility model embodiment is provided, preferably, the output terminal further comprises：Cable and
BNC out splice going splices, the BNC out splice going splices connect the BNC input adapters of the analog channel, and the analog signal passes sequentially through
The cable and BNC out splice going splices are exported to the BNC input adapters of the analog channel.Certainly, the utility model embodiment is simultaneously
The method is not only limited to, can also oscillograph be connected to by other connection modes, then the rear end of oscillograph, i.e. modulus turn
Change the data flow that part means that shared digital channel and analog channel.
The oscilloprobe that the utility model embodiment provides, preferably, the cable progress one includes：Signal core,
It is grounded GND cores, supply voltage VCC line core and reference voltage V ref cores.Preferably, supply voltage VCC cores simultaneously to
Comparator module and D/A converter module output power.
The oscilloprobe that the utility model embodiment provides, preferably, the comparator module further comprises：Benchmark
Voltage cell, comparing unit and output unit, the reference voltage unit Memory Reference voltage, the comparing unit compare institute
Measuring signal and the size of reference voltage are stated, and comparison result is exported by the output unit to the digital-to-analogue conversion mould
Block.Specifically, comparator module by the measuring signal of input and reference voltage V ref relatively after, output high level (1) or low
The digital signal of level (0).Wherein reference voltage V ref is configurable, and compares demand with the level for realizing different.
The oscilloprobe that the utility model embodiment provides, preferably, the D/A converter module is：High-speed digital-analog turns
Parallel operation or resistor network by digital analog converter or resistor network, allow the voltage of each digital channel by the method for weighting
Be barricaded as an analog signal, but the utility model embodiment is not limited to above two method, it is any in the prior art can be with
The method for realizing digital-to-analogue conversion belongs to the range that the utility model embodiment is protected.
A specific embodiment is provided below.Measuring signal enters comparator module by probe entry port, per number
Reference voltage V ref in the voltage value and comparator module of word channel compares.Digital channel output higher than Vref is high level
(1), the channel output less than Vref is low level (0).So N channel inputs, and N bit are can be obtained by by comparing device module
Binary digit.Such as N inputs CH1~CH4 for 4 channels, voltage is respectively 0.2V, 2.5V, 0.3V, 3.1V.Reference voltage
Vref is set as 1.2V, then after comparator module, the binary system of output is 2 ' b0101.
The binary code value obtained in above process can be made up of high-speed A/D converter or resistor network
Digital analog converter, binary code form digital quantity change into analog quantity, after the requirement of analog channel and analog channel
The resolution ratio of analog-to-digital conversion module ADC determine the most suitable voltage weight of each digital channel, such as analog channel mould
The reference voltage of number modular converter ADC is 2.56V, resolution ratio 8bit, 2^8=256 rank, the electricity per single order (ADC resolution ratio)
It presses as 0.01V.For example, digital channel number N is 4, in the case of 4 digital channels, the weight of CH1 is 1.28V, CH2
It is the weight of 0.32V, CH4 is 0.16V that weight, which is the weight of 0.64V, CH3,.Specifically, the voltage weight of each channel is to set
It sets.But concrete numerical value, it can be determined according to the resolution ratio and other factors of ADC.Since 4 digital channels form 4^ altogether
2=16 kind situations, therefore its stepping is 0.160V.Due to the 0.01V that is distinguished as of ADC, and the input stepping of digital signal is
0.16V, therefore there are enough intervals to distinguish.Certainly, the utility model embodiment be not limited to the input of 4 digital channels and
The ADC of 0.01V resolution ratio.
Assuming that the voltage of CH1~CH4 is respectively 0.2V, 2.5V, 0.3V, 3.1V.The voltage of reference voltage V ref is
1.2V, then after comparator module, the binary system of output is 2 ' b 0101.After D/A converter module DAC,
The voltage value of output is 1.28*0+0.64*1+0.32*0+0.16*1=0.80V.This signal passes through cable and BNC out splice going splices
Afterwards, the analog channel of oscillograph can be directly entered.Finally according to the acquisition of the analog-to-digital conversion module ADC of analog channel rear end electricity
Pressure value judges digital channel code value.The voltage value that ADC is read is 0.80V, and the reference voltage of ADC is 2.56V, the step of ADC
Into for 0.01V, then the code value read is 80,2 ' b01010000 of binary system, due to consideration that noise margin and error, are
The bit error rate is avoided the occurrence of, the sampling of ADC is allowed the error range of several code values, specific error range and its true value occur
Table is as shown in Table 1.For example, the voltage value of ADC acquisitions may be located at any one numerical value (73~88 in 0.73~0.88V sections
ADC code values), all judge input for 0101, that is, the output voltage of DAC is 0.8V.
Table one
A kind of oscilloprobe with logic analysis channel designed by the utility model embodiment, in oscilloprobe
After digital signal is changed into analog signal by place, the analog channel of the existing oscillograph of reusable is not only saved cost and is reduced and develops
Difficulty, even if while on the existing oscillograph without logic analyser hardware, by simply being dismounted to hardware components
With smaller change is done to software section, can also increase logic analysis function, specific implementation step is without in the utility model reality
It applies in example and repeats.
The utility model embodiment also provides a kind of oscillograph, and the oscillograph is disclosed including a kind of above-mentioned any embodiment
Oscilloprobe, analog channel and analog-to-digital conversion module, the simulation that the analog channel exports the oscilloprobe
Signal transmission gives the analog-to-digital conversion module, by the oscilloscope display after the analog-to-digital conversion module processing.
Unlike traditional mixed signal oscillograph, the oscillograph described in the utility model embodiment, by logic point
The digital channel and the analog channel of oscillograph that analyzer is included are incorporated as common channel, do not need to additionally increase number again
Channel saves space and I/O resources.
To sum up, a kind of oscilloprobe described in the utility model embodiment and oscillograph have the following advantages that：
1st, the digital signal of input is changed into analog signal by way of weighting at oscilloprobe, subsequently to show
The multiplexing of wave device analog channel.
2nd, the digital channel of multichannel can be changed into signal all the way by D/A converter module, facilitates transmission.
3rd, the input of multiplexed analog channel is popped one's head in as logic analyser and is inputted, to reduce development difficulty and cost.
4th, when Back end data is handled, analog channel and digital channel shared data stream.
Those skilled in the art will also be appreciated that the various illustrative components, blocks that the utility model embodiment is listed
(illustrative logical block), unit and step can pass through the combination of electronic hardware, computer software, or both
It is realized.To clearly show that the replaceability (interchangeability) of hardware and software, above-mentioned is various illustrative
Component (illustrative components), unit and step universally describe their function.Such function
It is that specific application and the design requirement of whole device are depended on to realize by hardware or software.Those skilled in the art can
For each specific application, various methods can be used to realize the function, but this realization is understood not to surpass
Go out the range of the utility model embodiment protection.
Various illustrative logical blocks or unit described in the utility model embodiment can pass through general procedure
Device, digital signal processor, application-specific integrated circuit (ASIC) or other programmable logic devices, discrete gate or transistor logic,
Described function is realized or is operated in discrete hardware components or the design of any of the above described combination.General processor can be micro-
Processor, optionally, the general processor may be any traditional processor, controller, microcontroller or state machine.Place
Managing device can also be realized, such as digital signal processor and microprocessor by the combination of computing device, multi-microprocessor,
One or more microprocessors combine a digital signal processor core or any other like configuration to realize.
The step of method or algorithm described in the utility model embodiment, can be directly embedded into hardware, processor performs
Software module or the two combination.Software module can be stored in RAM memory, flash memory, ROM memory, EPROM
Other any form of storages in memory, eeprom memory, register, hard disk, moveable magnetic disc, CD-ROM or this field
In medium.Illustratively, storaging medium can be connect with processor, so that processor can read letter from storaging medium
Breath, and can be to storaging medium stored and written information.Optionally, storaging medium can also be integrated into processor.Processor and storage
Medium can be set in ASIC, and ASIC can be set in user terminal.Optionally, processor and storaging medium can also be set
It is placed in the different components in user terminal.
In one or more illustrative designs, the described above-mentioned function of the utility model embodiment can be hard
Part, software, firmware or the arbitrary of this three combine to realize.If realized in software, these functions can store and computer
It is transmitted on the medium of computer-readable on readable medium or with one or more instruction or code form.Computer readable medium
Including computer storaging medium and convenient for allow computer program to be transferred to from a place telecommunication media in other places.Store matchmaker
Jie can be that any general or special computer can be with the useable medium of access.For example, such computer readable media can be with
Including but not limited to RAM, ROM, EEPROM, CD-ROM or other optical disc storage, disk storage or other magnetic storage devices or
It is other it is any can be used for carrying or store with instruct or data structure and it is other can be general or special by general or special computer
The medium of the program code of different processor reading form.In addition, any connection can be properly termed computer-readable matchmaker
It is situated between, if for example, software is to pass through a coaxial cable, optical fiber electricity from a web-site, server or other remote resources
Cable, twisted-pair feeder, Digital Subscriber Line (DSL) are also contained in institute with wireless way for transmitting such as example infrared, wireless and microwaves
In the computer readable medium of definition.The disk (disk) and disk (disc) including compress disk, radium-shine disk, CD,
DVD, floppy disk and Blu-ray Disc, disk is usually with magnetic duplication data, and disk usually carries out optical reproduction data with laser.On
The combination stated can also be included in computer readable medium.
The utility model is not limited to above-mentioned preferred forms, anyone can obtain under the enlightenment of the utility model
Other various forms of products, however, make any variation in its shape or structure, it is every that there is same as the present application or phase
Approximate technical solution, all falls within the scope of protection of the utility model.
Claims (8)
1. a kind of oscilloprobe, which is characterized in that the probe includes：Probe entry port, comparator module, digital-to-analogue conversion mould
Block and output terminal；Measuring signal is transferred to after comparator module is handled and exports to the digital-to-analogue by the probe entry port
Modular converter, the output terminal is by the transformed analog signal output of the D/A converter module to the analog channel of oscillograph.
2. oscilloprobe according to claim 1, which is characterized in that the output terminal further comprises：Cable and BNC
Out splice going splice, the BNC out splice going splices connect the BNC input adapters of the analog channel, and the analog signal passes sequentially through institute
It states cable and BNC out splice going splices is exported to the BNC input adapters of the analog channel.
3. oscilloprobe according to claim 2, which is characterized in that the cable progress one includes：Signal core connects
Wire core, supply voltage core and reference voltage core.
4. oscilloprobe according to claim 1, which is characterized in that the comparator module further comprises：Benchmark
Voltage cell, comparing unit and output unit, the reference voltage unit Memory Reference voltage, the comparing unit compare institute
Measuring signal and the size of reference voltage are stated, and comparison result is exported by the output unit to the digital-to-analogue conversion mould
Block.
5. oscilloprobe according to claim 1, which is characterized in that the D/A converter module is：High-speed digital-analog turns
Parallel operation or resistor network.
6. oscilloprobe according to claim 1, which is characterized in that it is logical that the probe entry port includes several numbers
Road.
7. a kind of oscillograph, which is characterized in that the oscillograph includes oscillograph as claimed in any one of claims 1 to 6 and visits
Head, analog channel and analog-to-digital conversion module, the analog channel by the analog signal transmission that the oscilloprobe exports to
The analog-to-digital conversion module, by the oscilloscope display after the analog-to-digital conversion module processing.
8. a kind of oscillograph according to claim 7, which is characterized in that the oscillograph further includes：BNC input adapters,
Connect the BNC out splice going splices of the output terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201721392600.2U CN207601127U (en) | 2017-10-25 | 2017-10-25 | A kind of oscilloprobe and oscillograph |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721392600.2U CN207601127U (en) | 2017-10-25 | 2017-10-25 | A kind of oscilloprobe and oscillograph |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107782931A (en) * | 2017-10-25 | 2018-03-09 | 优利德科技(中国)有限公司 | A kind of oscilloprobe, oscillograph and its measuring method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107782931A (en) * | 2017-10-25 | 2018-03-09 | 优利德科技(中国)有限公司 | A kind of oscilloprobe, oscillograph and its measuring method |
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