Ukubuya umva ngoku kuxa amandla ombane ekuphumeni kwenkqubo engaphezulu kombane kwigalelo, ebangela ukuba umsinga uqukuqelele kwisistim usiya kwicala elingasemva.
Imithombo:
1. I-body diode iba calanye xa i-MOSFET isetyenziselwa ukutshintshwa kokulayisha izicelo.
2. ukuhla ngokukhawuleza kwi-voltage yegalelo xa umbane unqanyuliwe kwisistim.
Amathuba apho kufuneka kuqwalaselwe umva ukuvaleka kwangoku:
1. xa unikezelo lwamandla oluphindiweyo lulawulwa yiMOS
2. Ulawulo lwe-ORing.I-ORing ifana nokuphindaphinda amandla, ngaphandle kokuba endaweni yokukhetha unikezelo lwamandla ukunika amandla inkqubo, i-voltage ephezulu ihlala isetyenziselwa ukunika amandla inkqubo.
3. Ukwehla kombane ocothayo ngexesha lokulahleka kwamandla, ngakumbi xa i-capacitance yemveliso inkulu kakhulu kunomthamo wegalelo.
Iingozi:
1. i-reverse current inokonakalisa i-circuitry yangaphakathi kunye nezixhobo zombane
2. i-spikes yangoku ebuyela umva inokonakalisa iintambo kunye nezihlanganisi
3. I-diode yomzimba we-MOS iphakama ekusebenziseni amandla kwaye inokonakala
Iindlela zokuphucula:
1. Sebenzisa iidiode
IiDiode, ngakumbi ii-Schottky diodes, zikhuselwe ngokwemvelo kwi-reverse current kunye ne-reverse polarity, kodwa zibiza, zinemisinga yokuvuza ephezulu, kwaye zifuna ukuchithwa kobushushu.
2. Sebenzisa umva-umva MOS
Zombini izikhombisi zinokuvaleka, kodwa zihlala kwindawo enkulu yebhodi, i-impedance ephezulu yokuqhuba, iindleko eziphezulu.
Kulo mfanekiso ulandelayo, ulawulo lwe-transistor conduction, umqokeleli wayo uphantsi, i-PMOS conduction ezimbini, xa i-transistor ivaliwe, ukuba imveliso iphezulu kunegalelo, icala lasekunene le-MOS body diode conduction, ukwenzela ukuba inqanaba le-D phezulu, ukwenza inqanaba le-G liphezulu, icala lasekhohlo le-MOS yomzimba we-diode alidluli, kwaye kwangaxeshanye, ngenxa ye-MOS ye-VSG ye-voltage ye-diode ye-voltage ye-diode ye-body drop ayifikanga kwi-voltage yombane, ngoko ke ezimbini MOS zivaliwe, nto leyo ivale imveliso kwigalelo langoku.Oku kuthintela yangoku ukusuka kwimveliso ukuya kwigalelo.
3. Ukubuyisela umva iMOS
Ukubuyisela umva i-MOS inokuthintela imveliso kwigalelo le-reverse yangoku, kodwa into engalunganga kukuba kusoloko kukho indlela ye-diode yomzimba ukusuka kwigalelo ukuya kwimveliso, kwaye ingabi krelekrele ngokwaneleyo, xa imveliso inkulu kunegalelo, ayinakujika. Icime i-MOS, kodwa kufuneka yongeze isekethe yokuthelekisa i-voltage, ke kukho idiode efanelekileyo kamva.
4. Ukutshintsha umthwalo
5. Ukwenza izinto ezininzi
Multiplexing: ukukhetha enye yezimbini okanye ngaphezulu zonikezelo zongeniso phakathi kwazo ukunika amandla imveliso enye.
6. IDiode efanelekileyo
Kukho iinjongo ezimbini ekwenzeni i-diode efanelekileyo, enye kukulinganisa i-Schottky kwaye enye kukuba kufuneka kubekho i-input-output comparison circuit ukuyicima ngasemva.
Ixesha lokuposa: Aug-10-2023