Changing clock domain

[ALuPin]

Hi,

following question:

I have a signal in an 48MHz clock domain, it is high for exactly one clock
cycle.
Now I want to pass it to an 90MHz clock domain where the synchronized signal
should also be high for one 90MHz clock cycle.
Is the following approach reasonable?



signal l_valid_48 : std_logic; -- high for one 48MHz clock cycle
signal l_valid_h1 : std_logic;
signal l_valid_h2 : std_logic;
signal l_valid_h3 : std_logic;
signal l_valid_90 : std_logic; -- should be high for one 90MHz clock cycle

process(Reset, Clk_90)
begin
if Reset='1' then
l_valid_h1 <= '0';
l_valid_h2 <= '0';
l_valid_h3 <= '0';

elsif rising_edge(Clk_90) then
l_valid_h1 <= l_valid_48;
l_valid_h2 <= l_valid_h1;
l_valid_h3 <= l_valid_h2;
end if;
end process;

process(l_valid_h2, l_valid_h3)
begin
l_valid_90 <= '0';

if ((l_valid_h2='1') and (l_valid_h3='0')) then
l_valid_90 <= '1';
end if;
end process;


I would appreciate your opinion.

Rgds