PNP thiab NPN hloov cov cim ntawm lub sensor (2)

PNP thiab NPN sensors feem ntau muaj peb kab, uas yog lub hwj chim kab VCC (lub hwj chim mov zoo), 0V kab (lub hwj chim mov tsis zoo), thiab tawm teeb liab tawm kab.
Hauv kev siv tswv yim, PNP hom feem ntau siv, uas yog, qib siab ua haujlwm hauv lub xeev; NPN tsis tshua siv.

PNP txhais tau hais tias thaum lub teeb liab tshwm sim, lub teeb liab tso tawm kab tawm yog txuas nrog lub hwj chim kab VCC, uas yog sib npaug rau cov kab hluav taws xob tawm mus rau theem siab.

a. Rau PNP-NO hom:

Thaum tsis muaj lub teeb liab tshwm sim, cov kab tso tawm raug tshem tawm, uas yog, VCC fais fab kab thiab cov kab tawm raug txiav tawm.

Thaum lub teeb liab tshwm sim, nws xa tawm tib qhov hluav taws xob raws li VCC cov kab hluav taws xob, uas yog, cov kab tawm tau txuas nrog lub hwj chim kab VCC, thiab tso tawm VCC qib siab.

b. Rau PNP-NC hom:

Thaum tsis muaj lub teeb liab tshwm sim, tib qhov hluav taws xob raws li VCC lub hwj chim kab tau tawm, uas yog, cov kab tawm tau txuas nrog lub hwj chim kab VCC, thiab VCC qib siab yog cov zis.

Thaum lub teeb liab tshwm sim, cov kab hluav taws xob tso tawm raug tshem tawm, uas yog, VCC fais fab kab thiab cov kab tawm raug txiav tawm.

Muaj kev txaus siab txog pebUPS 1ntse hloov siab thiabUPS 2hluav taws xob hloov siab, xav tiv taujStella Meng.