1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: CMOS gate for the logic function

  1. Apr 8, 2012 #1
    Hello. One of my friends told me that the logic function for (A.or.B).and.(C.or.D) is

    rmidjd.jpg


    From a book, I know the P1, P2 , N1, N2 form a NAND. The same for P3, P4, N3, N4.
    And P5, P6, N5, N6 form a NOR.

    My question is, is this circuit the same as (A.or.B).and.(C.or.D) ?

    Thank you
     
  2. jcsd
  3. Apr 8, 2012 #2
    O/P of first stage(nand) = (A.B)* , second stage = (C.D)*
    and third stage(nor) = ( (A.B)* + (C.D)* )* = (A.B)** . (C.D)** = A.B.C.D
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook