Kule mihla, i-PLC inokufumana i-eceder kunye nemiqondiso yesenzi ngaphandle kwe-Amplifier, ngoko kuzonwabisa 'kumthombo "kunye' nokuntywila"? Kuphela kukuphumeza kwe-PLC kuya kuba nemifanekiso "yomthombo" kunye "nokuvuza".

Ngapha koko, ngaphandle kweJapan iPlC, akuyimfuneko kwezinye ii-PLCs zokusebenzisa izifinyezo ezinje ngokuthi "ngumthombo" kunye "nokuntywila", kodwa i-PNP kunye ne-NPN isetyenziswe ngqo.

I-PNP ngumgca we-voltage ephantsi, kwaye i-NPN ingumgca woluntu oluphezulu. Ngalo lonke ixesha olu nxibelelwano luchanekile, kubonakala ngathi akunamsebenzi ukuba iikhonsepthi "zomthombo" kunye "nokuntywila" kubuyisiwe. Nangona kunjalo, enye into "ingcinga yengqondo kwaye iphosakele" iphosakele, eya kubangela isiginali ukuba ihlawulwe.

Ingqondo entle nengalunganga

Kwisekethe yohlobo lwe-PNP, i-terminal eqhelekileyo yokuhambisa amandla kunye nomqondiso kwinqanaba eliphantsi le-0V. Xa igalelo likwinqanaba eliphantsi, akukho mahluko wevoltage ene-terminal eqhelekileyo, ngoko akukho nto isungulwa i-Ispaling Imveliso yokuTshintshana (inani ledijithali ngu-0). Kuphela kuxa igalelo likwinqanaba eliphezulu, kukho umahluko wevolthi kunye ne-terminal eqhelekileyo kunye nokutshintsha kwetshiphu kukuphumelela kwinqanaba eliphezulu. Le ndlela yedijithali (inani ledijithali li-1) elisebenza xa isiginali kwinqanaba eliphezulu libizwa ngokuba yi-PNP elungileyo.

Kwisekethe ye-NPN, i-terminal eqhelekileyo yokuhambisa amandla kunye nomqondiso kwinqanaba eliphezulu (uphawu lwesekethe le-Amplifier). Xa igalelo likwinqanaba eliphezulu, akukho mahluko phakathi kwegalelo kunye nemveliso, ke akukho mveliso itshintshiweyo (inani ledijithali ngu-0). Kuphela kuxa igalelo likwinqanaba eliphantsi (ukwenza i-funnel), kukho igalelo le-swinting, kwaye lo mqondiso usebenzayo (inani ledijithali liyi-1) Imo yedijithali kwinqanaba eliphantsi le-NPN.