In my cadence develop environment there is a noise source model in library "ahdl",if you have such library you can simply use it for Spectre simulation.
Hope this will help!
Hi IBO,
I just wanna make sure It's our SWS
I'm an SWS graduate too, I was in the first graduation project sponsored by SWS
anyway to make spread spectrum clock generator you can make in in different ways but the most common one is to make Fractional N PLL as you will modulate the division factor N
best regards,
Rania