Help me measure the phase margin using Pspice 9.2

[wael_wael]

hi friends
could some one help me to measure the phase margin with using pspice 9.2, I don't know how I do it
regds

 

[hr_rezaee]

help in Pspice

hi
you must plot your 20log(AC output) and phase(AC output) in semilog axis.
ad then easily measure phase margin.
regards

 

[wael_wael]

Re: help in Pspice

thanks
do u mean that
Pspice==>markers==>advanced==>phase of voltage

 

[hr_rezaee]

help in Pspice

hi
no, I mean that when pspice draw plot, you can use math function and plot 20*log() and phase().
see help of pspice.
regards

 

[haytham]

Re: help in Pspice

Hi

no, I mean that when pspice draw plot, you can use math function and plot 20*log() and phase().
see help of pspice.
regards

I used this method before and it is working very well. It is very easy to do

 

[wael_wael]

Re: help in Pspice

hi
no, I mean that when pspice draw plot, you can use math function and plot 20*log() and phase().
see help of pspice.
regards

thank u very much, could u send some tutorial or whatever, to do that
in fact i am not familier with pspice, so i didnt under stand were i can use 20log.
i drew the circuit and i started simulation with AC phase of volt and dB magnutiued of volt, i get result but i dont no where i can writ 20 log AC
so i am waiting ur help
regds for all

 

[hr_rezaee]

help in Pspice

hi
oh, sorry
because of now I don't have spice in my PC.
please wait.
regards

Added after 9 minutes:

hi
see
**broken link removed** --> E: doing math

if you search in google you can find more
regards

 

[020170]

Re: help in Pspice

Some EDA book is helpful for you




the following book is not linked here. but very useful for you.

PSpice : a tutorial / L.H. Fenical. (Englewood Cliffs, N.J. ; New York : Prentice Hall, c1992.)

If you have enough time to find this book, must find it. you never regret.