What is a D-latch? Write the VHDL Code for it?

Answers were Sorted based on User's Feedback



What is a D-latch? Write the VHDL Code for it?..

Answer / rams

D latch is a device it simply transfers data from input to
output when the enable is activated.its used for the
forming of d flip flops.

Is This Answer Correct ?    17 Yes 4 No

What is a D-latch? Write the VHDL Code for it?..

Answer / sghsg

library ieee;
use ieee.std_logic_1164.all;

entity D_latch is
port (
clk : in std_logic;
d : in std_logic;
q : out std_logic
);
end D_latch;

architecture arch_D_latch of D_latch is
begin
process(d,clk)
begin
-- +ve level sensitive
if(clk = '1') then
q <= d;
else
q <= q;
end if;
end process;
end arch_D_latch;

Is This Answer Correct ?    0 Yes 0 No

What is a D-latch? Write the VHDL Code for it?..

Answer / bhushan

D-Latch is a level sensitive flip-flop.
output changes as long as clock is High(for +ve level
sensitive) or High(for -ve level sensitive)


library ieee;
use ieee.std_logic_1164.all;

entity D_latch is
port (
clk : in std_logic;
d : in std_logic;
q : out std_logic
);
end D_latch;

architecture arch_D_latch of D_latch is
begin
process(d,clk)
begin
-- +ve level sensitive
if(clk = '1') then
q <= d;
else
q <= q;
end if;
end process;

end arch_D_latch;

Is This Answer Correct ?    23 Yes 24 No

Post New Answer

More VLSI Interview Questions

Give the expression for calculating Delay in CMOS circuit?

1 Answers   Infosys,


In what cases do you need to double clock a signal before presenting it to a synchronous state machine?

3 Answers   IBM, Intel, nvidia,


How to improve these parameters? (Cascode topology, use long channel transistors)

0 Answers  


Explain what is multiplexer?

0 Answers  


Draw a transistor level two input NAND gate. Explain its sizing (a) considering Vth (b) for equal rise and fall times

0 Answers   Infosys,






Tell me how BJT works.

2 Answers  


You have a driver that drives a long signal & connects to an input device. At the input device there is either overshoot, undershoot or signal threshold violations, what can be done to correct this problem?

4 Answers   Intel,


what is the difference between the TTL chips and CMOS chips?

0 Answers  


If not into production, how far did you follow the design and why did not you see it into production?

0 Answers   Intel,


Have you studied buses? What types?

1 Answers   Intel,


what is charge sharing?

0 Answers   Intel,


What are the main issues associated with multiprocessor caches and how might you solve them?

1 Answers   Intel,


Categories