Random input for data modeling in Cadence Spectre

[Mostafa_Said]

Hi,

My problem is that the power consumption behavior of my circuit is highly dependent on the data values (current and previous) therefore I want to produce a random input to my circuit, the randomization here is in the timing between each consecutive pulses, I mean that the time between each two pulses is random while the voltage of every pulse is constant

does anybody know how to make that in Cadence-Spectre,

your help is highly appreciated, thanks in advance

 

[sudheerkm]

if u know the statistics of ur pulses

just integrate the power supply current and findout power for one cycle of ur pulse

and multiply by the rate of pulses .....

to get average power

no need to generate random pulses

 

[Mostafa_Said]

if u know the statistics of ur pulses

just integrate the power supply current and findout power for one cycle of ur pulse

and multiply by the rate of pulses .....

to get average power

no need to generate random pulses

Thanks a lot Sudheerkm for your reply,

The problem is that I have 2 random data sources, and the power consumption (charging and discharging of the parasitic capacitance) relay on the correlation between then and their previous values too, so I really need to generate 2 inputs with uniform random timing between each two consecutive pulses

plz Sudheerkm if you find my reply reveals that I did not get your idea well, then clarify more your previous reply to me, and thanks again for your reply

 

[dick_freebird]

If you understand the circuit and the nature of the data
then you ought to be able to predict a worst case, best
case pulse configuration that will serve for endpoint spec
verification. But if you want a use-model statistical average
you'd have to get fancier.

 

[Mostafa_Said]

Thanks a lot for all,

I have successfully found the solution,

it is using ahdlLib library, then select rand_bit_stream generator that will generate a constant voltage but with varying timing between bits.

Thanks agian for your time and effort