电子信息工程专业专业英语-lesson30logic analysers

1、Unit 10 Electronic Instruments & MeasurementsLesson 30 Logic Analyzers电子信息工程专业英语教程任治刚 主编电子工业出版社 Lesson 30 Logic AnalysersBackgroundsText tour Language in useVocabulary Structure Reading/writing techniquesTerminology Threshold门限，开端，极限Timing diagram时序图Pulse width脉冲宽度，脉冲持续时间Backgrounds2022/8/5电子信息工程专业英

2、语教程4Terminology SUT: System Under Test被测系统Impedance阻抗Time base时基，扫描基线，扫描发生器Backgrounds2022/8/5电子信息工程专业英语教程5Terminology Data acquisition数据采集Propagation delay传播延迟Mnemonics 助记符；速记法BackgroundsText tour Outline Capabilities and FeaturesArchitecture and OperationProbeSetup (Clock Mode and Triggering)Acqui

3、sition: Real-time Acquisition Memory analysis and Display 2022/8/5电子信息工程专业英语教程7Capabilities and FeaturesThe logic analyzer has different capabilities than the oscilloscope. the number of channels (inputs) Typical digital oscilloscopes have up to four signal inputs. Some complex system designs requir

4、e thousands of input channels. Appropriately-scaled logic analyzers are available for those tasks as well.2022/8/5电子信息工程专业英语教程8Capabilities and FeaturesA logic analyzer measures and analyzes signals differently than an oscilloscope. The logic analyzer doesnt measure analog details. Instead, it detec

5、ts logic threshold levels. A logic analyzers waveform timing display is similar to that of a timing diagram found in a data sheet or produced by a simulator. All of the signals are time-correlated, so that setup-and-hold time, pulse width, extraneous or missing data can be viewed. 2022/8/5电子信息工程专业英语

6、教程9Capabilities and FeaturesIn addition to their high channel count, logic analyzers offer important features that support digital design verification and debugging. Among these are:Sophisticated triggering that lets you specify the conditions under which the logic analyzer acquires data.High-densit

7、y probes and adapters that simplify connection to the system under test (SUT).Analysis capabilities that translate captured data into processor instructions and correlate it to source code.2022/8/5电子信息工程专业英语教程10Architecture and OperationFigure 10-7 Simplified logic analyzer block diagram2022/8/5电子信息

8、工程专业英语教程11Architecture and OperationProbeThe probes internal comparator is where the input voltage is compared against the threshold voltage (Vth), and where the decision about the signals logic state (1or 0) is made. The probe provides a high-quality signal path to the logic analyzer, minimizes ele

9、ctrical loading on the SUT and adapts to the various types of connections on circuit boards and devices .2022/8/5电子信息工程专业英语教程12Architecture and OperationProbeThe impedance of the logic analyzers probes (capacitance, resistance, and inductance) es part of the overall load on the circuit being tested.

10、 It is always critical to choose a probe with the lowest possible total capacitance.2022/8/5电子信息工程专业英语教程13Architecture and OperationSetup (Clock Mode and Triggering)Asynchronous acquisition captures signal timing information. In this mode, a clock internal to the logic analyzer is used to sample dat

11、a. The faster that data is sampled, the higher will be the resolution of the measurement. There is no fixed timing relationship between the target device and the data acquired by the logic analyzer. This acquisition mode is primarily used when the timing relationship between SUT signals is of primar

12、y importance.2022/8/5电子信息工程专业英语教程14Architecture and OperationSetup (Clock Mode and Triggering)Synchronous acquisition is used to acquire the “state” of the SUT. A signal from the SUT defines the sample point (when and how often data will be acquired). The signal used to clock the acquisition may be

13、the system clock, a control signal on the bus, or a signal that causes the SUT to change states. Data is sampled on the active edge and it represents the condition of the SUT when the logic signals are stable. The logic analyzer samples when, and only when, the chosen signals are valid.2022/8/5电子信息工

14、程专业英语教程15Architecture and OperationAcquisition: Real-time Acquisition Memory The logic analyzers probing, triggering, and clocking systems exist to deliver data to the real-time acquisition memory. This memory is the heart of the instrument the destination for all of the sampled data from the SUT, a

15、nd the source for all of the instruments analysis and display.2022/8/5电子信息工程专业英语教程16Architecture and OperationAcquisition: Real-time Acquisition Memory key factors in choosing a logic analyzerwidth depthsome tips to help determine channel count and memory depth:How many signals do you need to captur

16、e and analyze? How much “time” do you need to acquire? 2022/8/5电子信息工程专业英语教程17Architecture and Operationanalysis and Display The waveform display a multi-channel detailed view that lets you see the time relationship of all the captured signalsThe listing displayprovides state information in user-sele

17、ctable alphanumeric form.The source code debug displayAn additional displaycorrelating the source code to the instruction trace historyArchitecture and Operationanalysis and Display The waveform display is ideal for: Diagnosing timing problems in SUT hardwareVerifying correct hardware operation by c

18、omparing the recorded results with simulator output or data sheet timing diagramsMeasuring hardware timing-related characteristics: Race conditionsPropagation delaysAbsence or presence of pulsesAnalyzing glitchesVocabulary Threshold concern probe Base Impedance StructureReading/writing techniquesLan

19、guage in useVocabulary2022/8/5电子信息工程专业英语教程21Threshold in dictionaryA piece of wood or stone placed beneath a door; a doorsill.门槛An entrance or a doorway.入口，门口The place or point of beginning; the outset.起点；开端2022/8/5电子信息工程专业英语教程22Threshold in dictionaryA point separating conditions that will produce

20、a given effect from conditions of a higher or lower degree that will not produce the effect, as the intensity below which a stimulus is of sufficient strength to produce sensation or elicit a response:上限，下限，阀值2022/8/5电子信息工程专业英语教程23Threshold in dictionaryA point separating conditions that will produc

21、e a given effect from conditions of a higher or lower degree that will not produce the effect, as the intensity below which a stimulus is of sufficient strength to produce sensation or elicit a response:上限，下限，阀值2022/8/5电子信息工程专业英语教程24Threshold in textA logic analyzer measures and analyzes signals dif

22、ferently than an oscilloscope. The logic analyzer doesnt measure analog details. Instead, it detects logic threshold levels.逻辑分析仪测量、分析信号的方式也和示波器不一样。逻辑分析仪并不测量信号的模拟细节，而是检测信号的逻辑门限电平。 2022/8/5电子信息工程专业英语教程25Threshold in use interference threshold干扰门限operating threshold工作阈pulse improvement threshold脉冲信噪比改

23、善阈值quantizer threshold量化器门限2022/8/5电子信息工程专业英语教程26Threshold in use threshold of reaction反应极限threshold of sensitivity灵敏度界限2022/8/5电子信息工程专业英语教程27Concern in dictionaryTo have to do with or relate to:涉及,相关To be of interest or importance to:有关This problem concerns all of us.To engage the attention of; inv

24、olve:参与We concerned ourselves with plishing the task at hand.To cause anxiety or uneasiness in:使担忧The firms weak financial posture is starting to concern its stockholders.2022/8/5电子信息工程专业英语教程28Concern in dictionaryA matter that relates to or affects one.利害Regard for or interest in someone or somethi

25、ng.考虑,关心A troubled or anxious state of mind arising from solicitude or interest.顾虑A business establishment or enterprise; a firm.公司或企业A contrivance; a gadget.器具2022/8/5电子信息工程专业英语教程29Concern in textWhen you connect a logic analyzer to a digital circuit, youre only concerned with the logic state of th

26、e signal. 当把逻辑分析仪连接到数字电路的时候，人们只关心信号的逻辑状态。 2022/8/5电子信息工程专业英语教程30Concern in use Concerned adj.Interested and involved 有关的sent a memorandum to those concerned.Anxious; troubled 担忧；焦虑的the concerned parents of youthful offenders.Concerning prep.关于,有关I spoke to him concerning his behavior. 2022/8/5电子信息工程

27、专业英语教程31Probe in dictionaryAn exploratory action, expedition, or device, especially one designed to investigate and obtain information on a remote or unknown region:探索A slender, flexible surgical instrument used to explore a wound or body cavity.探针2022/8/5电子信息工程专业英语教程32Probe in dictionaryThe act of

28、exploring or searching with or as if with a device or an instrument.探查，探测An investigation into unfamiliar matters or questionable activities; a penetrating inquiry:调查，查究2022/8/5电子信息工程专业英语教程33Probe in dictionaryTo explore with or as if with a probe:探测To delve into; investigate.调查；查究2022/8/5电子信息工程专业英语

29、教程34Probe in textThe probes are capable of acquiring high-quality signals, and have a minimal impact on the SUT. 探头能够采集高质量信号，而且对被测系统的影响最小。 2022/8/5电子信息工程专业英语教程35Probe in use active probe有源探测器capacitance-divider probe电容分压探针comb probe梳状测针deep-space probe太空探测器2022/8/5电子信息工程专业英语教程36Probe in use four poi

30、nt probe四点探针gamma-ray probe射线探头grounded probe接地探头Hall probe霍尔探头2022/8/5电子信息工程专业英语教程37Base in dictionaryIn a numeration system, the number that is raised to the power denoted by the exponent and then multiplied the mantissa to determine the number represented. 底数A reference value.基准2022/8/5电子信息工程专业英语

31、教程38Base in dictionaryIn a numeration system, the number that is raised to the power denoted by the exponent and then multiplied the mantissa to determine the number represented. 底数A reference value.基准2022/8/5电子信息工程专业英语教程39Base in dictionaryIn a document copying machine, a sup- porting material for

32、an emulsion or other sensitizing agent.基片, 基底In a bipolar transistor, the control area or the electrical connection to the control area.基极2022/8/5电子信息工程专业英语教程40Base in text Logic analyzers are designed to capture data from multi-pin devices and buses. The term “capture rate” refers to how often the

33、inputs are sampled. It is the same function as the time base in an oscilloscope. “采集速率”这个词是指输入信号的采样频率。其功能和示波器中的时基电路是一样的。 2022/8/5电子信息工程专业英语教程41Base in use base basis foundation ground groundworkThese nouns all pertain to what underlies and supports. Base is applied chiefly to material objects: Basis

34、 is used in a nonphysical sense Foundation applies physically (the foundation of a house)and figuratively (a statement without foundation in fact). It often stresses firmness of support for something of relative magnitude: 2022/8/5电子信息工程专业英语教程42Base in use base basis foundation ground groundworkThese nouns all pertain to what underlies and