Designer’s Guide Community

‹ Previous topic | Next topic ›

Pages: 1

exclude transistor from noise analysis (Read 4875 times)

mkaragou

Junior Member

Offline

Posts: 30
Germany Soest

exclude transistor from noise analysis
Jun 01^st, 2006, 4:42am

Do you know if there is a way to exclude transistors from the noise analysis in spectre?
Is there a option to make a transistor noisless like it is possible for resistors?

Because sometimes it is nice to see the noise contribution of every single transistor to check where the dominant noise source is located.

Furthermore is it possible to simulate only one sort of noise soure like only thermal or only flicker noise?
Again the goal would be, to see what kind of noise is dominant in the design.

IP Logged

Chromatik New Member Offline Posts: 5	Re: exclude transistor from noise analysis Reply #1 - Jun 1^st, 2006, 6:12am Depends for the simulator you're using... Anyway, if you change the transistor model to a noiseless model, the noise contribution of the transistor would be fine ;) Regards
Back to top	IP Logged

mkaragou Junior Member Offline Posts: 30 Germany Soest	Re: exclude transistor from noise analysis Reply #2 - Jun 1^st, 2006, 6:21am I am using spectre in cadence v5.0.33 my models are written in bsimv3.3 I already have set the noia, noib, noic parameters to zero to get rid of the flicker noise but I have not found any way to switch off the thermal noise in the model files!
Back to top	IP Logged

mkaragou Junior Member Offline Posts: 30 Germany Soest	Re: exclude transistor from noise analysis Reply #3 - Jun 1^st, 2006, 6:51am http://www.designers-guide.org/Forum/?board=rfsim;action=display;num=1091334193 I should develop the good habit to use the search function before stating question!
Back to top	IP Logged

mkaragou Junior Member Offline Posts: 30 Germany Soest	Re: exclude transistor from noise analysis Reply #4 - Jun 1^st, 2006, 7:38am One thing that would be nice to have would be, the possibility to present results of the noise summary graphically when a parameter is sweeped.
Back to top	IP Logged

Andrew Beckett Senior Fellow Offline Life, don't talk to me about Life... Posts: 1742 Bracknell, UK	Re: exclude transistor from noise analysis Reply #5 - Jul 20^th, 2006, 1:57pm You can use the results browser to navigate to the noise analysis outputs - you can plot the contribution of any noise source (at the output) for any device in the circuit. Regards, Andrew.
Back to top	IP Logged

Pages: 1

‹ Previous topic | Next topic ›