外文翻译led显示屏数字电压表(适用于毕业论文外文翻译+中英文

《外文翻译led显示屏数字电压表(适用于毕业论文外文翻译+中英文》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、w外文文献原稿和译文原稿FrontsideCopyrightofthiscircuitbelongstosmartkitelectronics.InthispagewewillusethiscircuittodiscussforimprovementsandwewillintroducesomechangesbasedonoriginalschematicGeneralDescriptionThisisaneasytobuildbutneverthelessveryaccurateanduseful

2、digitalvoltmeter.IthasbeendesignedasapanelmeterandcanbeusedinDCpowersuppliesoranywhereelseitisnecessarytohaveanaccurateindicationofthevoltagepresent.ThecircuitemploystheADCAnaloguetoDigitalConverterI.C.CL7107madebyINTERSIL.ThisICincorporatesina40pincas

3、eallthecircuitrynecessarytoconvertananaloguesignaltodigitalandcandriveaseriesoffoursevensegmentLEDdisplaysdirectly.ThecircuitsbuiltintotheICareananaloguetodigitalconverteracomparatoraclockadecoderandasevensegmentLEDdisplaydriver.Thecircuitasitisdescrib

4、edherecandisplayanyDCvoltageintherangeof0-1999Volts.TechnicalSpecifications-CharacteristicsSupplyVoltage:............./-5VSymmetricalPowerrequirements:.....200mAmaximumMeasuringrange:........../-0-1999VDCinfourrangesAccuracy:.......................0.1F

5、EATURESSmallsizeEasyconstructionLowcost.Simpleadjustment.Easytoreadfromadistance.wFewexternalcomponents.HowitWorksInordertounderstandtheprincipleofoperationofthecircuititisnecessarytoexplainhowtheADCICworks.ThisIChasthefollowingveryimportantfeatures:Gr

6、eataccuracy.Itisnotaffectedbynoise.Noneedforasampleandholdcircuit.Ithasabuilt-inclock.Ithasnoneedforhighaccuracyexternalcomponents.Schematicfixed16-11-09w7-segmentdisplaypinoutMAN6960AnAnaloguetoDigitalConverterADCfromnowonisbetterknownasadualslopeconv

7、erterorintegratingconverter.Thistypeofconverterisgenerallypreferredoverothertypesasitoffersaccuracysimplicityindesignandarelativeindifferencetonoisewhichmakesitveryreliable.Theoperationofthecircuitisbetterunderstoodifitisdescribedintwostages.Duringthef

8、irststageandforagivenperiodtheinputvoltageisintegratedandintheoutputoftheintegratorattheendofthisperiodthereisavoltagewhichisdirectlyproportionaltotheinputvoltage.Attheendofthepresetperiodtheintegratorisfedwithaninternalreferencevoltage