红外遥控芯片外文文献Word文档格式.docx
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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"
maybeofhighlevelislow,andmayalsodependontheoutputcorrespondingstaticstate,suchasfeetforlow,static"
high"
foreffective,Asforthestatic,"
low"
higheffective.Inmostcases,"
for
effective."
Sincethelock"
referstolaunchtheoutputofeachtimeyoupressthebutton,areceiveroutputcorrespondingchange,namelyoriginallyastateforhighlevelintoalowlevel,originallyforlowlevelintohighlevel.Theou