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Simulators >> RF Simulators >> Issues and doubts about IIP3 using PSS and PAC of cadence.
https://designers-guide.org/forum/YaBB.pl?num=1398872047

Message started by VINAY RAO on Apr 30^th, 2014, 8:34am

Title: Issues and doubts about IIP3 using PSS and PAC of cadence.
Post by VINAY RAO on Apr 30^th, 2014, 8:34am

Hello all,
This is the first time I am doing IIP3 kind of analysis that too with PSS and PAC for a LNA. I have got few doubts and issues with the simulation.

1> In PSS, what does periodic steady state refers to? I read Ken Kundert's document but didn't understand completely.
In PSS, whether simulator only computes DC operating point and its corresponding responses first at each point throughout the time in a given period? For example: If input is large sinusoidal, then whether PSS computes DC op point and its corresponding responses at each time instance of that signal over a period?

2> After PSS and PAC run, under direct form plot, what does Single point Input Power Value refers to? Is this the power value of second tone or the first fundamental tone?

3> As I change this Single point Input Power Value from -50dBm to -20dBm, IIP3 values are also getting changed respectively. Why IIP3 values changes with input power and at which input power, IIP3 values have to be measured?

Thank you,

Regards,
Vinay Rao.