红外遥控芯片外文文献.docx

红外遥控芯片外文文献.docx

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InfraredRemoteAndChipsAreIntroduced

People'seyescanseethevisiblewavelengthfromlongtoshortaccordingtothearrangement,inordertored,orange,yellow,green,green,blue,violet.Oneoftheredwavelengthsfor0.62~0.76muonm,Purpleis0.38wavelengthrange~muonm.Purpleisshorterthanthewavelengthoflightcalledultravioletray,redwavelengthsoflightislongerthanthatofinfraredlight.Infraredremotecontrolistousewavelengthfor0.76~1.5muonmbetweenthenearinfraredtotransfercontrolsignal.

Commonlyusedinfraredremotecontrolsystemofgeneralpointstransmitandreceivetwoparts.Themaincomponentpartforthelaunchofinfraredlightemittingdiode.Itisactuallyaspeciallightemittingdiode,duetoitsinternalmaterialdiffersfromordinarylightemittingdiode,resultinginitsendsoncertainvoltage,itisaratherinfraredlight.Useofinfraredlightemittingdiodetheinfraredwavelengths,for940nmappearanceandordinary,justthesamelightemittingdiodefivedifferentcolors.Infraredlightemittingdiodegenerallyhaveblackandblue,transparentthreecolors.Judgementofinfraredlightemittingdiodeandjudgmentmethod,usingamultimetertoordinarydiodeelectricblockmeasureofinfraredlightemittingdiode,reverseresistance.Theinfraredlightemittingdiodeluminescenceefficiencytousespecialinstrumenttomeasureprecise,anduseonlyspareconditionstopullawayfromroughlyjudgement.Receivingpartofinfraredreceivingtubeisaphotosensitivediode.

Inactualapplicationofirreceivingdiodetoreversebias,itcanworknormally,i.e.,theinfraredreceivingcircuitapplicationindiodeisusedtoreverse,highersensitivity.Infraredreceivingdiodeusuallyhavetworoundandrectangular.Duetothepowerofinfraredlightemittingdiode（orlesscommonly100mW）,soirreceivingdiodereceivedsignalsisweak,sowillincreasehigh-gainones.theamplifiercircuit.

IncommonCX20106A,etcPC1373Hmuoninfraredreceivingspecialamplifiercircuit.Inrecentyearsbothamateurorformalproducts,mostlyusinginfraredreceivingheadfinished.Theheadofinfraredreceivingproductpackagesgenerallyhastwokinds:

onekindUSESsheetshielding,Akindofplasticpackaging.Thereare

threepin,namelythepoweris（VDD）,powernegative（GND）anddataoutput（VOorOUT）.Infraredreceivingheadfootarrangementfortypesvaried,manufacturer'sinstructions.Finishedtheadvantagesofinfraredreceivingheadisnotinneedofsophisticateddebuggingandshellscreen,useriseasatransistor,veryconvenient.Butwhenusedintheinfraredreceivingattentionfinishedfirstcarrierfrequency.

Infraredremotecommoncarrierfrequencyfor38kHz,thisistransmittedbyusing455kHzTaoZhentodecide.Atthelaunchofcrystalswereintegerfrequency,frequencycoefficients,socommonly12,so455kHz÷12hundredthkHz38kHzhundredth379,000.Someremotecontrolsystemadopts36kHz,56kHz,etc,general40kHzlaunchedbythecrystalsofoscillationfrequencytodecide.

Infraredremotecharacteristicisnotinfluencethesurroundingenvironmentanddoesnotinterferewithotherelectricequipment.Duetoitscannotpenetratewalls,sotheroomcanusecommonhouseholdapplianceofremotecontrolwithoutmutualinterference,Circuittestingissimple,aslongasgivencircuitconnection,generallydoesnotneedanycommissioningcanwork,Decodingeasily,canundertakemultipleremotecontrol.Becauseeachmanufacturerproducesagreatdealofinfraredremoteapplication-specificintegratedcircuit,whenneedpressdiagramsuoji.Therefore,theinfraredremotenowinhouseholdappliances,indoorclose（lessthan10meters）intheremotecontroliswidelyused.

Multipleinfraredremotecontrolsystemofinfraredemissioncontrolbuttons,therearemanypartsgeneralrepresentativeofdifferentcontrolfunction.Whenpressedabutton,correspondinglyinthereceiverwithdifferentoutput.

Receivingtheoutputstatecanberoughlydividedintopulse,level,self-lockingandinterlock,datafiveforms."Thepulseoutputisaccordingtolaunch"whenthebutton,thereceiveroutputterminalsoutputcorresponding"effective",apulsewidth100msingeneral."Level"referstotheoutputlaunchpressbutton,thereceiveroutputcorrespondingoutputlevel","effectivetransmittoloosenthereceiver"level"disappears.This"effectivepulse"and"effective",maybeofhighlevelislow,andmayalsodependontheoutputcorrespondingstaticstate,suchasfeetforlow,static"high"foreffective,Asforthestatic,"low"higheffective.Inmostcases,"high"for

effective."Sincethelock"referstolaunchtheoutputofeachtimeyoupressthebutton,areceiveroutputcorrespondingchange,namelyoriginallyastateforhighlevelintoalowlevel,originallyforlowlevelintohighlevel.Theou