Midterm 1 Problems
1. Show the arrangement of transistors needed to construct a gate whose output F is the inverted
value of
.
F
(
A
,
B
,
C
)
(
A
B
C
( )
A
B
( )
A
B
C
)
=
+
+
+
+
+
Try to minimize the number of transistors involved.
Place the arrangement of transistors within the dashed boxes below, making sure to
make appropriate connections to the ground, the high voltage, the inputs A, B, C, and the
output F.
(20 points)
Solution and Grading:
(
A B C A B A B C
) (
) (
) (
A B C A B
)(
) (
B
(
A C
))(
B A
)
B A A C
(
)
B AC
+ +
+
+ +
=
+ +
+
=
+
+
+
=
+
+
=
+
F A B C
( , , ) (
B AC
)
=
+
B
C
A
A
A
F
A
B
C