Noise in transient analysis

[Robert Hagglund]

Dear all,

We are simulating a mixed-signal system in the Cadence (4.4.6)
environment and we observe the response for a given stimuli. We want to
simultaneously observe the effect of for example thermal noise on the
system response, but we have observed that the transient analysis that
we used so far does not include noise. How can we include noise, or is
there another way of including these effects while feeding predefined
input signals to the simulation?

For example how can we study the noise contribution in a mutitone test
of a resistor-ladder DAC.

Best regards,
Robert Hägglund

 

[Hristo Brachkov]

No transient noise analysis, I guess we already discussed that. Eventually
you may run PSS+PNOISE analysis. After it you may get the noise contribution
of each component. In the PSS analysis you may use PSIN to inject the noise.

I'm not totally sure what is the case for Cadence 5.0, but I guess it is
pretty much the same.


Hristo


"Robert Hagglund" <roberth@isy.liu.se> wrote in message
news:bp2led$4c0$1@news.island.liu.se...

Dear all,

We are simulating a mixed-signal system in the Cadence (4.4.6)
environment and we observe the response for a given stimuli. We want to
simultaneously observe the effect of for example thermal noise on the
system response, but we have observed that the transient analysis that
we used so far does not include noise. How can we include noise, or is
there another way of including these effects while feeding predefined
input signals to the simulation?

For example how can we study the noise contribution in a mutitone test
of a resistor-ladder DAC.

Best regards,
Robert Hägglund