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Simulators >> Circuit Simulators >> transient noise simulation
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Message started by raja.cedt on Oct 25^th, 2011, 1:10am

Title: transient noise simulation
Post by raja.cedt on Oct 25^th, 2011, 1:10am

hello all,
i want to verify one of my serial link TX with transient noise, so for that i want to use transient noise to get proper estimation of DJ. So in the transient noise options what is the meaning of

a. Noise seed
b. noise fmax
c.noise scale
d.noise fmin
e. noise tmin

Thanks,
raj.

Title: Re: transient noise simulation
Post by sheldon on Oct 25^th, 2011, 6:18am

Raja,

No you don't need a transient noise simulation. A transient simulation
will give you the deterministic jitter. You will need a PRBS source and
your channel model for DJ. You need transient noise if you want to
simulate random jitter, RJ.

Best Regards,

Sheldon

Title: Re: transient noise simulation
Post by raja.cedt on Oct 26^th, 2011, 1:18am

hello seldon,
sorry it's a typo, i wanted to calculate RJ, not DJ. so this RJ how to determine all setting what i had in the previous post. Or can yo uplease point me any ref which explains

Title: Re: transient noise simulation
Post by sheldon on Oct 27^th, 2011, 6:25am

Raja,

Usually, you only need to set noisefmax when simulating white
noise and noisefmax/noisefmin when simulating 1/f and white
noise.

Best Regards,

Sheldon

a. Noise seed, seed for the noise generator, not really required
b. Noise fmax, sets the maximum frequency of the noise
c. Noise scale, probably not required. scales the noise up to
reduce the effect of numerical noise on the calculation
d. Noise fmin, used if you want to model 1/f noise, sets the
minimum frequency for the 1/f noise generator
e. Noise tmin, the inverse of noisefmax, sets the minimum time
step size