I. Intshayelelo
Amanzi Anokukhanyisa Amakhandlela, Ngaba Yinyaniso?Yinyani!
Ngaba yinyani ukuba iinyoka ziyayoyika irealgar?Bubuxoki!
Into esiza kuyixoxa namhlanje yile:
Ukuphazamiseka kunokuphucula ukuchaneka komlinganiselo, ngaba yinyani?
Kwiimeko eziqhelekileyo, ukuphazamiseka lutshaba lwendalo lokulinganisa.Ukuphazamiseka kuya kunciphisa ukuchaneka komlinganiselo.Kwiimeko ezinzima, umlinganiselo awuyi kwenziwa ngokuqhelekileyo.Kulo mbono, ukuphazamiseka kunokuphucula ukuchaneka komlinganiselo, obuxoki!
Noko ke, ngaba oku kusoloko kunjalo?Ngaba kukho imeko apho ukuphazamiseka kunganciphisi ukuchaneka komlinganiselo, kodwa kunokuphucula?
Impendulo nguewe!
2. IsiVumelwano soMphazamiseko
Ngokudityaniswa nemeko yokwenyani, senza esi sivumelwano silandelayo ngophazamiseko:
- Ungenelelo aluqulathanga amacandelo eDC.Kumlinganiselo wangempela, ukuphazamisa ikakhulu kukuphazamiseka kwe-AC, kwaye le ngcinga inengqiqo.
- Xa kuthelekiswa nomlinganiselo wombane we-DC, i-amplitude yokuphazamiseka incinci.Oku kuhambelana neyona meko.
- Uphazamiseko luphawu lwexesha, okanye ixabiso lentsingiselo nguziro ngaphakathi kwexesha elimiselweyo.Le ngongoma ayiyonyani kumlinganiselo wokwenyani.Nangona kunjalo, njengoko uphazamiso luqhelekile luphawu oluphezulu lwe-AC, kuphazamiso oluninzi, ingqungquthela ye-zero ithetha ingqiqo ixesha elide.
3. Ukuchaneka komlinganiselo phantsi kokuphazamiseka
Uninzi lwezixhobo zokulinganisa umbane kunye neemitha ngoku zisebenzisa abaguquli be-AD, kwaye ukuchaneka kokulinganisa kwabo kuhambelana ngokusondeleyo nesisombululo somguquli we-AD.Ngokuqhelekileyo, abaguquli be-AD abanesisombululo esiphezulu banokuchaneka komlinganiselo ophezulu.
Nangona kunjalo, isisombululo se-AD sihlala silinganiselwe.Ukucinga ukuba isisombululo se-AD si-3 bits kwaye i-voltage ephezulu yokulinganisa i-8V, i-converter ye-AD ilingana nesikali esahlulahlulwe kwi-8, icandelo ngalinye li-1V.uya 1v.Isiphumo somlinganiselo wale AD sihlala siyinani elipheleleyo, kwaye inxalenye yesishumi isoloko ithwalwa okanye ilahliwe, ekucingelwa ukuba ithwalwe kweli phepha.Ukuthwala okanye ukulahla kuya kubangela iimpazamo zomlinganiselo.Umzekelo, i-6.3V inkulu kune-6V kwaye ingaphantsi kwe-7V.Isiphumo somlinganiselo we-AD ngu-7V, kwaye kukho impazamo ye-0.7V.Le mpazamo siyibiza ngempazamo yobungakanani beAD.
Ukuze kube lula ukuhlalutya, sicinga ukuba isikali (i-AD converter) ayinayo enye impazamo yokulinganisa ngaphandle kwephutha le-AD quantization.
Ngoku, sisebenzisa izikali ezibini ezifanayo ukulinganisa ii-voltages ezimbini ze-DC eziboniswe kuMfanekiso 1 ngaphandle kokuphazamiseka (imeko efanelekileyo) kunye nokuphazamiseka.
Njengoko kubonisiwe kwi-Figure 1, i-voltage ye-DC elinganiselweyo yi-6.3V, kwaye i-voltage ye-DC kumfanekiso wasekhohlo ayinakho ukuphazamiseka, kwaye ixabisa rhoqo kwixabiso.Umzobo osekunene ubonisa umsinga othe ngqo ophazamiseke ngokutshintshatshintshayo, kwaye kukho ukuguquguquka okuthile kwixabiso.I-voltage ye-DC kumzobo wasekunene ilingana nombane we-DC kumzobo osekhohlo emva kokuphelisa umqondiso wokuphazamiseka.Isikwere esibomvu kumfanekiso simele umphumo wokuguqulwa kwesiguquli se-AD.
Umbane ofanelekileyo weDC ngaphandle kokuphazamiseka
Faka umbane ophazamisayo we-DC onexabiso eliphakathi elinguziro
Yenza imilinganiselo ye-10 yombane othe ngqo kwiimeko ezimbini kulo mzobo ungentla, kwaye emva koko ulinganise imilinganiselo ye-10.
Isikali sokuqala ngasekhohlo silinganiswa amaxesha ali-10, kwaye ufundo luyafana ngexesha ngalinye.Ngenxa yempembelelo yempazamo ye-AD quantization, ukufundwa ngalunye yi-7V.Emva kwemilinganiselo ye-10 i-avareji, isiphumo sise-7V.Iphutha le-AD quantization yi-0.7V, kunye nephutha lokulinganisa ngu-0.7V.
Isikali sesibini ngasekunene sitshintshe kakhulu:
Ngenxa yokumahluko kwizinto ezilungileyo kunye ezimbi zokuphazamiseka kwe-voltage kunye ne-amplitude, impazamo ye-AD ye-quantization iyahluka kwiindawo ezahlukeneyo zokulinganisa.Ngaphantsi kokutshintshwa kwephutha le-AD quantization, umphumo wokulinganisa i-AD utshintsha phakathi kwe-6V kunye ne-7V.Imilinganiselo esixhenxe yayiyi-7V, emithathu kuphela yayiyi-6V, kwaye i-avareji yemilinganiselo ye-10 yayiyi-6.3V!Impazamo ngu-0V!
Enyanisweni, akukho mpazamo engenakwenzeka, kuba kwihlabathi lenjongo, akukho 6.3V engqongqo!Nangona kunjalo, kukho ngokwenene:
Kwimeko yokungabikho kokuphazamiseka, ekubeni umphumo ngamnye wokulinganisa uyafana, emva kokulinganisa imilinganiselo ye-10, impazamo ihlala ingatshintshi!
Xa kukho isixa esifanelekileyo sokuphazamiseka, emva kokuba imilinganiselo ye-10 ilinganiswe, impazamo ye-AD yokulinganisa iyancipha ngomyalelo wobukhulu!Isisombululo siphuculwe ngomyalelo wobukhulu!Ukuchaneka komlinganiselo kwakhona kuphuculwe ngomyalelo wobukhulu!
Imibuzo ephambili yile:
Ngaba kuyafana xa i-voltage elinganisiweyo imanye amaxabiso?
Abafundi banokunqwenela ukulandela isivumelwano sokuphazamiseka kwicandelo lesibini, bavakalise uphazamiseko ngothotho lwamanani amanani, babeke ngaphezulu kokuphazamiseka kombane olinganisiweyo, baze babale iziphumo zomlinganiselo wenqaku ngalinye ngokomgaqo wokuthwala we-AD converter. , kwaye emva koko ubale ixabiso eliqhelekileyo lokuqinisekisa, nje ukuba i-amplitude yokuphazamiseka inokubangela ukuba ukufundwa emva kwe-AD quantization itshintshe, kwaye i-sampling frequency iphezulu ngokwaneleyo (ukuphazamiseka kwe-amplitude utshintsho lunenkqubo yenguqu, kunokuba amaxabiso amabini alungile kwaye angalunganga. ), kwaye ukuchaneka kufuneka kuphuculwe!
Kunokungqinwa ukuba okoko nje amandla ombane alinganisiweyo angeyonto ipheleleyo (ayikho kwihlabathi lenjongo), kuya kubakho impazamo ye-AD ye-quantization, nokuba ingakanani na impazamo yobungakanani be-AD, ukuba nje ubukhulu be-AD ukuphazamiseka kukhulu kunephutha le-AD quantization okanye inkulu kunesisombululo esincinci se-AD, kuya kubangela ukuba umphumo wokulinganisa utshintshe phakathi kwamaxabiso amabini asondeleyo.Ekubeni ukungenelela ku-positive kunye ne-negative symmetric, ubukhulu kunye namathuba okuhla kunye nokunyuka kuyalingana.Ngoko ke, xa ixabiso langempela lisondele kwiliphi ixabiso, amathuba okuba liphi ixabiso eliya kubonakala likhulu, kwaye liya kufutshane neliphi ixabiso emva kokulinganisa.
Oko kukuthi: ixabiso eliqhelekileyo lemilinganiselo emininzi (ukuphazamiseka kwexabiso lemilinganiselo ngu-zero) kufuneka ibe kufutshane nesiphumo sokulinganisa ngaphandle kokuphazamiseka, oko kukuthi, ukusebenzisa isignali yokuphazamiseka kwe-AC kunye nexabiso eliqhelekileyo le-zero kunye ne-avareji yemilinganiselo emininzi inokunciphisa i-AD elinganayo. iimpazamo, phucula isisombululo somlinganiselo we-AD, kwaye uphucule ukuchaneka komlinganiselo!
Ixesha lokuposa: Jul-13-2023
