Homework 4
Problem 1
Find the functionality for the following circuit. Complete a truth table (please include which FETs
are on or off), then write the final function in sum-of-products format. (if you cannot figure out
the funciton by looking at the circuit, place the truth table in a K-Map. Simplify the K-Map to find
the resulting sum-of-products function.)
Problem 2
Develop the CMOS circuit for the following function. Do not simplify the function. Implement it
in it’s current form. Make sure that your circuit does not produce a short between VDD and GND
or a floating output.
Problem 3
The DC characteristic of a 3-input NAND can be found by assuming that A=B=Vdd and C moves
from 0V to Vdd. Vdd=5V for this problem.
Vout
AA
B
C
A
A
B
C
C
C
m1
m2
m3
m4m5
m6m7
m8
m9
m10
XAB+()CD AB+=
