AND Gate library ieee; use ieee.std_logic_1164.all; entity and_gate is port (a,b : in std_logic ; c : out std_logic); end and_gate; architecture arc of and_gate is begin c <= a and b; end arc; OR Gate library ieee; use ieee.std_logic_1164.all; entity or_gate is port (a,b : in std_logic ; c : out std_logic); end or_gate; architecture arc of or_gate is begin c <= a or b; end arc; NOT Gate library ieee; use ieee.std_logic_1164.all; entity not_gate is port (a: in std_logic ; b : out std_logic); end not_gate; architecture arc of not_gate is begin b <= not a; end arc; NAND Gate library ieee; use ieee.std_logic_1164.all; entity nand_gate is port (a,b : in std_logic ; c : out std_logic); end nand_gate; architecture arc of nand_gate is begin c <= a or b; end arc; NOR Gate library ieee; use ieee.std_logic_1164.all; entity nor_gate is port (a,b : in std_logic ; c : out std_logic); end nor_gate; architecture ar
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