ECET-230 – Digital Circuits and Systems
Homework Assignment #3

Name ____________________________

1.      Determine the decimal value of each of the followingunsigned binary numbers:
a.  10011001

1.      Determine the decimal value of each of the followingsigned binary number displayed in the 2’s complement form:
a.  10011001

1.      Determine the outputs (Cout, Sout) of a full-adder for each of the following inputs:
a. A = 1, B = 0, Cin = 0

b. A = 0, B = 1, Cin = 1

c. A = 0, B = 0, Cin = 1

d. A = 1, B = 1, Cin = 1

1.      The circuit below is an attempt to build a half-adder. Will the Cout and Sout function properly? Demonstrate your rationale.

1.      Determine the outputs for the circuit shown below. Assume that C0 = 0 for all cases.

1.     

Write the VHDL text for the 2-bit magnitude comparator shown below.
solution:

1.      Write the VHDL text file for a 2-bit full-adder using BIT types.

1.      Write the VHDL text file for a 2-bit full-adder using INTEGER types.