Ukuba i-interlayer capacitance ayinkulu ngokwaneleyo, intsimi yombane iya kusasazwa kwindawo enkulu yebhodi, ukwenzela ukuba i-impedance ye-interlayer iyancitshiswa kwaye i-current ibuyele ingabuyela kwinqanaba eliphezulu.Kule meko, intsimi eveliswa ngulo mqondiso inokuphazamisa intsimi yesignali yokutshintsha ekufutshane.Le asiyonto ebesiyilindele kwaphela.Ngelishwa, kwibhodi ye-4 ye-intshi ye-0.062, iileyile zikude kwaye i-interlayer capacitance incinci.
Xa iingcingo zitshintsha ukusuka kumaleko woku-1 ukuya kuLuleko lwesi-4 okanye ngokuphendululekileyo, iya kukhokela le ngxaki iboniswe njengomfanekiso.

Umzobo ubonisa ukuba xa umqondiso ulandelela ukusuka kwi-1 ukuya kumgca we-4 (umgca obomvu), i-current current kufuneka itshintshe indiza (umgca ohlaza okwesibhakabhaka).Ukuba i-frequency ye-signal iphezulu ngokwaneleyo kwaye iindiza zisondelene kunye, i-current current iyakwazi ukuhamba nge-interlayer capacitance ekhoyo phakathi komgangatho womhlaba kunye nomgangatho wamandla.Nangona kunjalo, ngenxa yokungabikho koxhumo oluthe ngqo lwe-conductive yangoku, indlela yokubuya iphazamisekile, kwaye sinokucinga ngolu kuphazamiseka njenge-impedance phakathi kweenqwelomoya eziboniswe njengomfanekiso ongezantsi.

Ukuba i-interlayer capacitance ayinkulu ngokwaneleyo, intsimi yombane iya kusasazwa kwindawo enkulu yebhodi, ukwenzela ukuba i-impedance ye-interlayer iyancitshiswa kwaye i-current ibuyele ingabuyela kwinqanaba eliphezulu.Kule meko, intsimi eveliswa ngulo mqondiso inokuphazamisa intsimi yesignali yokutshintsha ekufutshane.Le asiyonto ebesiyilindele kwaphela.Ngelishwa, kwibhodi ye-4 ye-intshi ye-0.062 intshi, iileyile zikude (ubuncinci i-0.020 intshi), kwaye i-interlayer capacitance incinci.Ngenxa yoko, ukuphazamiseka kwendawo yombane echazwe ngasentla kwenzeka.Oku kusenokungabangeli imiba yemfezeko yomqondiso, kodwa ngokuqinisekileyo kuya kudala i-EMI engaphezulu.Yiyo loo nto, xa sisebenzisa i-cascade, sinqanda ukutshintsha iileya, ngakumbi kwiimpawu zefrikhwensi ephezulu njengewotshi.
Kuyinto eqhelekileyo ukongeza i-capacitor decoupling kufuphi nomngxuma wokudlula inguqu ukunciphisa i-impedance efunyanwa yimbuyekezo yangoku eboniswe njengomfanekiso ongezantsi.Nangona kunjalo, le capacitor yokuqhawula ayisebenzi kwiimpawu ze-VHF ngenxa yobuninzi be-self-resonant frequency.Kwiimpawu ze-AC ezinamaza angaphezulu kwe-200-300 MHz, asikwazi ukuxhomekeka kwi-decoupling capacitors ukudala indlela yokubuya ephantsi.Ke ngoko, sidinga i-capacitor yokuqhawula (phantsi kwe-200-300 MHz) kunye ne-capacitor enkulu ye-interboard yeefrikhwensi eziphezulu.

Le ngxaki inokuphetshwa ngokungatshintshi umaleko wesiginali engundoqo.Nangona kunjalo, i-interboard capacitance encinci yebhodi enemigangatho emine ikhokelela kwenye ingxaki enkulu: ukuhanjiswa kwamandla.Ii-ics zedijithali zewotshi zidla ngokufuna imisinga emikhulu yonikezelo lwamandla okwethutyana.Njengoko ixesha lokunyuka / lokuwa kwemveliso ye-IC iyancipha, kufuneka sihambise amandla kwizinga eliphezulu.Ukubonelela ngomthombo wentlawulo, sihlala sibeka i-decoupling capacitors kufutshane kakhulu kwi-logic nganye ye-IC.Nangona kunjalo, kukho ingxaki: xa sihamba ngaphaya kwee-self-resonant frequencies, i-decoupling capacitors ayikwazi ukugcina ngokufanelekileyo kunye nokudlulisa amandla, kuba kula maxesha i-capacitor iya kwenza njenge-inductor.
Ekubeni i-ics ezininzi namhlanje zinexesha elikhawulezayo lokunyuka / lokuwa (malunga ne-500 ps), sidinga isakhiwo esongezelelweyo sokuqhawula kunye ne-self-resonant frequency frequency than the decoupling capacitor.I-interlayer capacitance yebhodi yesekethe ingaba yisakhiwo esisebenzayo sokudibanisa, ngaphandle kokuba iileyile zisondelene ngokwaneleyo ukuze zinike amandla okwaneleyo.Ngoko ke, ukongeza kwii-capacitors ezisetyenziswa ngokuqhelekileyo, sikhetha ukusebenzisa iileyile zamandla ezisondeleleneyo kunye neengqimba zomhlaba ukubonelela amandla adlulayo kwii-ics zedijithali.
Nceda uqaphele ukuba ngenxa yenkqubo yokuvelisa ibhodi yesekethe eqhelekileyo, ngokuqhelekileyo asinazo i-insulators ezincinci phakathi kwesibini kunye neyesithathu ibhodi yebhodi ezine.Ibhodi enemigangatho emine enee-insulators ezincinci phakathi kwesibini kunye neyesithathu ingabiza kakhulu kunebhodi yesiqhelo emine.