Subversion Repositories simple_fm_receiver

-- ------------------------------------------------------------------------
-- Copyright (C) 2004 Arif Endro Nugroho
-- All rights reserved.
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-- Redistribution and use in source and binary forms, with or without
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-- 1. Redistributions of source code must retain the above copyright
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-- THIS SOFTWARE IS PROVIDED BY ARIF ENDRO NUGROHO "AS IS" AND ANY EXPRESS
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library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
 
entity phase_detector is
   port (
   clock        : in  bit;
   signal_input : in  bit_vector (07 downto 0);
   signal_nco   : in  bit_vector (07 downto 0);
   phase_output : out bit_vector (07 downto 0)
   );
end phase_detector;
 
architecture structural of phase_detector is
   component mult_8bit
   port (
   mult_01    : in  bit_vector (07 downto 00);
   mult_02    : in  bit_vector (07 downto 00);
   result_mult: out bit_vector (15 downto 00)
   );
   end component;
 
   signal output_mult  : bit_vector (15 downto 0);
 
   begin
 
phase_mult: mult_8bit
   port map (
   mult_01     (07 downto 0)  => signal_input,
   mult_02     (07 downto 0)  => signal_nco,
   result_mult (15 downto 0)  => output_mult
   );
 
   process (clock)
 
   begin
 
   if ((clock = '1') and clock'event) then
 
	phase_output <= output_mult(15 downto 8);
 
   end if;
 
   end process;
 
end structural;