discr.txt

全数字锁相环（adpll)的部分源程序代码

library ieee; 
use ieee.std_logic_1164.all; 
entity discr is 
 port(V1,V2:in std_logic; 
      VD:out std_logic); 
end discr; 
architecture discr_arch of discr is 
begin 
     VD<=V1 xor V2; 
end discr_arch;