Question

分析所示电路的逻辑功能

Answer 1

Y1=(ABC)'

Y3=(Y1 C)'=ABC+C'

Y2=(Y1 B)'=ABC+B'

Y4=(Y1 A)'=ABC+A'

Y=(Y2+Y3+Y4)'=(ABC+A'+B'+C')',但ABC=(A'+B'+C')'

=(1)' = 0 .