Edge detection using Combinatorial Logic

[ravics]

Is there a way to design an edge detection digital circuit without using Sequential logic?

 

[cent24.3]

Hi ravics,

Sure : just an RC cell and a schmitt trigger.

 

[ravics]

Thanks. Any way to implement using VHDL?

 

[xtcx]

I think you can use an Xor gate logic to detect the edges.

Begin

A_bar <= not (A) after 2 ns;

Y <= A_bar XOR A;

Your difference will be detected by the XOR gate. Resulting output will show an impulse whenever you get +ve and -ve edges.
If this is what you expect....You can simulate this for accurate results.