Cadence Stability Analysis

[nile_king]

cadence stability analysis

Hi

Dear all

I wanna know how to use the stability analysis in cadence tools ?
i'm designing bandgap cts and wanna check the stability and don't know how??
i put an AC source in the loop that i wanna check its stability and run the STB analysis and the probe to this source but obtain no results
is there any problem in what i did??

thanks in advance

 

[eng_Semi]

stability analysis cadence

U may use the cadence documents, its useful

 

[nile_king]

stb analysis cadence

U may use the cadence documents, its useful

what i wrote is exactly what in the documents

 

[ccw27]

stability cadence

Insert a iprobe from analoglib into the loop and select that as your probe in the stability analysis. That should solve the problem. If not clear let me know

 

[Han]

cadence stability

You will see the results if you go to results->direct plot->main form and choose stability analysis

 

[nile_king]

check stability cadence

Thank you for ur help
it works now
BUT i see the phase margin and gain margin in negative is that mean wrong in the design ??

 

[nile_king]

stability analysis stb

Hi

Is it must to open the loopin this analysis STB or the source inside the loop find the open loop gain and its phase margin

Thx