资源描述:
《陈建智专业英语翻译》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、外文翻译学院:物理与信息工程学院专业:微电子学与固体电子学姓名:陈建智学号:141120039导师:(签名)成绩:年级:2014级2015年03月TemperatureSensorICsSimplifyDesignsWhenyousetouttoselectatemperaturesensor,youarenolongerlimitedtoeitherananalogoutputoradigitaloutputdevice.Thereisnowabroadselectionofsensortypes,oneofwhichshouldmatchyoursy
2、stcnfsnccds.Untilrecently,allthetemperaturesensorsonthemarketprovidedanalogoutputs.Thermistors,RTDs,andthermocoupleswerefollowedbyanotheranalog-outputdevice,thesilicontemperaturesensor.Inmostapplications,unfortunately,theseanalog-outputdevicesrequireacomparator,anADC,oranamplifie
3、rattheiroutputtomakethemuseful.Thus,whenhigherlevelsofintegrationbecamefeasible,temperaturesensorswithdigitalinterfacesbecameavailable.TheseICsaresoldinavarietyofforms,fromsimpledevicesthatsignalwhenaspecifictemperaturehasbeenexceededtothosethatreportbothremoteand1ocaltemperature
4、swhileprovidingwarningsatprogrammedtcmpcraturcsettings.Thechoicenowisn"tsimplybetweenanalog-outputanddigital-outputsensors;thereisabroadrangeofsensortypesfromwhichtochoose.ClassesofTemperatureSensorsFourtcmpcrature-sensortypcsarcillustratedinFigure1.Anidceilanalogsensorprovidesan
5、outputvoltagethatisaperfectlylinearfunctionoftemperature(A).InthedigitalI/Oclassofsensor(B),temperaturedataintheformofmultipieIsandOsarepassedtothemicrocontroller,oftenviaaserialbus.Alongthesamebus,dataaresenttothetemperaturesensorfromthemicrocontroller,usuallytosetthetemperature
6、limitatwhichthealertpinsdigitaloutputwilltrip.Alertinterruptsthemicrocontrollerwhenthetemperaturehasbeenexceeded.Thistypeofdevicecanalsoprovidefancontrol.pc丄AknDigitalVO^AnalogPlus"SyMcmMiMiilurM—述¥lAknFin—•••■—Figure1・SensorandICmanufacturerscurrentlyofferfourclassesoftemperatur
7、esensors.HAnalog-plus'1sensors(C)areavailablewithvarioustypesofdigitaloutputs.TheV()utversustemperaturecurveisforanICwhosedigitaloutputswitcheswhenaspecifictemperaturehasbeenexceeded.Inthiscase,the"plus”addedtotheanalogtemperaturesensorisnothingmorethanacomparatorandavoltagerefer
8、ence・Othertypesof"plus"partsshiptemperat