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[Moved]digital system to detect a pulse

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sun_ray

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Please provide a digital system or circuit to detect a pulse.
 

To avoid further inquiries, you should by all means clarify the context of your question or explain what you want to achieve.
 

Without any details it is not possible to "provide a digital system".

Pulse detectors generally use comparators.
 

Here's a "digital system" to detect a pulse:
Capture.PNG
 
Can anybody please help to provide a digital circuit to detect a pulse where the pulse is being used as the input of the clock pin of a D flipflop?

Regards
 

sun_ray said:
Can anybody please help to provide a digital circuit to detect a pulse where the pulse is being used as the input of the clock pin of a D flipflop?

Regards
Click to expand...

Probably not, as that would be bad practice inside an fpga

How about giving us some of the specs and slow is what you've done already.
 


The problem is the lack of any specification in the original post, resulting in the slighty ironical but technical correct answers...

If you are e.g. looking for a circuit that can detect an asynchronous pulse of variable width (shorter or longer than the system clock) you should read about toggle synchronizers.
 

sun_ray said:
Please provide a digital system or circuit to detect a pulse.
Click to expand...

Here is a single code to detect a pulse. You can easily figure out the circuit from the code. This circuit actually detect the changes in the input 'in'. 'in' is normally tied to 'high' and if it produces a low pulse, the output of the circuit gives a single pulse. This is actually a Fall Edge Detector(FED).
I don't really understood what it meant by 'pulse detector'. Hope this is helpful.

Code: 
module FED(in,clk,out);
input in,clk;
output out;
wire q0,q1;
D_FF D1(in,clk,q0),
	  D2(q0,clk,q1);
assign out=(q0 && !q1);
endmodule

module D_FF(d,clk,q);
input d,clk;
output reg q;
always@(negedge clk)
 begin
  q<=d;
 end
endmodule
 

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