Math Is Fun Forum

Hannibal lecter

Member

Registered: 2016-02-11

Posts: 392

logic gate

Hi,
which logic gate gives :

x y result
0 0   1
0 1   0
1 0   1
1 1   0

this is the question :

if (A = '1') and (B = '1') then tempY <= '0';
elsif (A = '0') and (B = '0') then tempY <= '0';
else tempY < = '1';
end if;
if (A = '0' and B = '0') then tempZ <= '1';
elsif(A = '0' and B = '1') then tempZ <= '0';
elsif(A = '1' and B = '1') then tempZ <= '0';
elsif(A = '1' and B = '0') then tempZ <= '1';
end if;
end process;
Y <= tempY;
Z <= tempZ;

Y is an xor gate
but what is z

Last edited by Hannibal lecter (2022-02-10 10:49:38)

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Wisdom is a tree which grows in the heart and fruits on the tongue

Bob

Administrator

Registered: 2010-06-20

Posts: 10,623

Re: logic gate

This is NOT y.  The x input has no effect on the output.

B

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You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

pi_cubed

Member

From: A rhombicosidodecahedron

Registered: 2020-06-22

Posts: 115

Re: logic gate

Last edited by pi_cubed (2022-02-12 04:37:43)

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pi³

imcute

Member

Registered: 2022-09-28

Posts: 176

Re: logic gate

what ever it is,its not b