自学产 比较图215和图216 B3=43(A3B3)+B3(42B3)=A3由B3=(4=B3) P2=A2④B2=(42=B2) B=A1④B1=(A4=B1) 0=A④B0=(A0=B0) (A=B)o=(A4=B3)(A2=B2)(A1=BA=B)(A=B) 2021/223 作者:清华大学电子工程系罗嵘 第75页2021/2/23 作者：清华大学电子工程系罗嵘 第75页 ( ) ( ) ( ) P3 ＝A3 A3 B3 + B3 A3 B3 = A3  B3 = A3 = B3 ( ) ( ) ( ) 0 0 0 0 0 1 1 1 1 1 2 2 2 2 2 P A B A B P A B A B P A B A B =  = = =  = = =  = = 比较图2.15和图2.16 自学 A B O A B A B A B A B A B I ( ) ( )( )( )( )( ) = = 3 = 3 2 = 2 1 = 1 0 = 0 =