ELEC1155: Digital Systems 1 Section 2, Marcus, Fall 2015 Homework 5 Homework is due at the beginning of the next class. Late homework is not accepted. Reading: Chapter 1 & 2 & 3 & 4 1) Find the DUAL of the following expression (do not reduce)
a) f = (a’ + b�0 + 1)[1 � (ab’ + c)d + e�0] + a’b�1] b) f = ab’c + (a’+b+d)(abd’ + b’)
2) The following table shows the input and output voltages for a 2-‐input logic gate. a) Translate this table to a truth table using positive logic. What logic function is
realized for positive logic? b) Translate this table to a truth table using negative logic. What logic function
is realized for negative logic? E1 E2 E0 -‐5 -‐5 +5 -‐5 +5 -‐5 +5 -‐5 -‐5 +5 +5 +5 3) Find all possible terms that could be added to each expression using the
consensus theorem. F = A’C’D’ + BC’D + AB’C’ + A’BC