[SOLVED] Random data signal in cadence

[rjshmadala]

Hello friends,

I have small doubt.when we simulationg digital gates in cadence.which symobl in cadence should we use for producing a random data(suppose we use Vpulse for pulse signal,what should we use for random data).i used input data as a pulse it is giving results.but for random data what we have to use
Regards
Rjshmadala

 

[suhas_shiv]

You will have to use the VPWL and specify the nunber of pairs of points you want and specify the timing.

 

[vbhupendra]

use vpwl. u can specifies ur values at different time.

 

[rjshmadala]

hello,
I have used that signal and i did simulations too. actually i need random signal for Clock anda Data recovery circuits there the width of 0 and 1 should be same.i need a siganl like 0001111000111100011. like that in using Vpwl it is difficlut to produce random siganl with some frequency and having same widths isnt'it

regards
rjshmadala

 

[suhas_shiv]

You can do it using VPWL, but the timing information has to be correct for that. A little bit of basic calculation is needed thats all. I have used it to produce random data for my I/O receiver design.