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Ruta de datos (Multiplexores y demultiplexores
Página 8
EXAMENES
Mayo del 2002
Circuitos selectores de datos (multiplexores):
a. Conceptos demultiplexores.
b. Aplicarlo al diseño de dos niveles (usando multiplexores de
4 entradas y 1 salida
) de la
siguiente función lógica:
(, ,, ,) ( )
f
x y z u v xyzuv xyzuv xz u v
=+++
(, ,, ,) ( ) ( )
f xy z u v xyzuv xyzuv xz u v xyz u v xyzuv xzu xzv xyzu
x
yzv xyzuv xzu xzv
= + ++= ++ ++=++ ++
1
er
nivel “xz”:
(, ,, ,) ( ) (0) ( ) ( )
f x y z u v xyzu xyzv xyzuv xzu xzv x z uyv xz xz u vxz y
C
y
B
uv
A
=++ ++=⋅ ++++⋅+⋅
2
er
nivel “uy”:
()
A
uyv uy v
==
( ) () () (1) (1)
B
u v uy uy u yv uyv uyv uyv u y v uy v uy uy
=+=++⋅+ + + =⋅ + + +
(1) ( 0) ( ) ( 0)
Cyuyvyuyvuyvuuy uy uyv uy
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Diseño con circuitos multiplexores ydemultiplexores:
a. Aspectos teóricos.
b. Aplicarlo a los circuitos cambiadores de código que pasan de BCD (exceso a 3) a Gray. Para
facilitar la tarea se adjunta la tabla de correspondencia entre los...