Stats

Locked Locked
Replies 4
Subscribers 63
Views 6430
Members are here 0

This discussion has been locked.

You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Defining Noise in VDC by using noise/freq pairs

MicheleA over 12 years ago

Hi All,

if I set:

number of noise/freq pairs : 3

Freq1 : 1k

Noise1 : 1e-12

Freq2 : 100k

Noise2 : 1e-18

Freq3 : 1M

Noise3 : 1e-24

I would expect, similarly to what happens with pwl sources in time domain, to get a piecewise linear frequency characteristic.

This is however what I get:

So indeed the values at the points I have set are correct, but the interpolation is not what I would expect.

What am I doing wrong? It looks like the source is 'understanding' only 20dB/dec slopes..

Thanks for your help,

Michele

Parents

MicheleA over 12 years ago

Ok Andrew,
there it is. Very basic...But I think it is usable to build 'noise profiles' on the fly. It is fixed @10 points per decade but it is easy to change that. One possible improvement would be to allow for kneepoints not on the raster...But that involves some check :)
Hope this is of some use,
Michele

Noise from lin to log.zip
Cancel
Vote Up 0 Vote Down

Cancel

Reply

MicheleA over 12 years ago

Ok Andrew,
there it is. Very basic...But I think it is usable to build 'noise profiles' on the fly. It is fixed @10 points per decade but it is easy to change that. One possible improvement would be to allow for kneepoints not on the raster...But that involves some check :)
Hope this is of some use,
Michele

Noise from lin to log.zip
Cancel
Vote Up 0 Vote Down

Cancel

Children

No Data

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.