Noise Pollution

Example : 4 bit Johnson Counter with testbench A Johnson act is a digital roach which consists of a series of switch over flops connected to subscribe toher in a feedback manner.The tour is gaunt type of shift register where the complement eruptput of the lemniscus point flipflop is fed back to the input of first flipflop.This is close to mistakable to ring counter with a few extra advantages.When the enlistment is reset all the flipflop outputs are made zero. For n-flipflop Johnson counter we take out up a MOD-2n counter. That means the counter has 2n different states. The circuit diagram for a 3 bit Johnson counter is shown to a lower place: library IEEE; use IEEE.STD_LOGIC_1164.ALL; use IEEE.NUMERIC_STD.ALL; entity johnson_counter is port (         DAT_O : out unsigned(3 downto 0);         RST_I : in std_logic;         CLK_I : in std_logic         ); end johnson_counter; architecture Behavioral of johnson_counter is augury temporary : unsigned(3 downto 0):=(others => 0); begin DAT_O <= temp; sue(CLK_I) begin     if( rising_edge(CLK_I) ) hence         if (RST_I = 1) then             temp <= (others => 0);         else             temp(1) <= temp(0);             temp(2) <= temp(1);             temp(3) <= temp(2);             temp(0) <= not temp(3);         end if;     end if; end exploit;     end Behavioral; The testbench code used for testing the plan is given below: LIBRARY ieee; USE ieee.std_logic_1164.ALL; USE ieee.numeric_std.ALL; ENTITY tb2 IS expiration tb2; ARCHITECTURE behavior OF tb2 IS    --Inputs    signal RST_I : std_logic := 0;    signal CLK_I : std_logic := 0;     --Outputs    signal DAT_O : unsigned(3 downto 0);    -- time period definitions    constant CLK_I_period : time := 1 ns; BEGIN     -- represent the unit Under Test (UUT)    uut: entity work.johnson_counter PORT MAP (   !         DAT_O => DAT_O,           RST_I => RST_I,           CLK_I => CLK_I         );    -- Clock...If you destiny to get a full essay, order it on our website: OrderCustomPaper.com

If you want to get a full essay, visit our page: write my paper