Subject: Digital System Design

Topic: Introduction to VHDL

Difficulty: High

VHDL Code for 4-bit full adder/ 4 bit Ripple Carry Adder:

library IEEE;

use IEEE.STD_LOGIC_1164.ALL;

entity Ripple_Adder is

Port ( A : in STD_LOGIC_VECTOR (3 downto 0);

B : in STD_LOGIC_VECTOR (3 downto 0);

Cin : in STD_LOGIC;

S : out STD_LOGIC_VECTOR (3 downto 0);

Cout : out STD_LOGIC);

end …