.matteo
Community Member
![* *](https://designers-guide.org/forum/Templates/Forum/default/stargold.gif) ![* *](https://designers-guide.org/forum/Templates/Forum/default/stargold.gif)
Offline
Posts: 51
Padova, Italy
|
Hi everybody, thanks for reading my post. I'm trying to simulate the IIP2 of a fully differential LNA + transconductor + mixer chain. The BW of my sistem is from 2GHz to 18GHz.
This is the way I set up the simulation. My input port is sine type, with some power "prf", rf frequency "frf" and "pacmagdb" as the magnitude of PAC analysis in dBm. QPSS analysis run a flexible balance engine on frf and flo (the LO freq.) where frf=2.401G and flo=2.4G, tstab=10n, sweeping prf=pacmagdb from -60 to 10dBm. The I do a QPAC analysis at 2.4GHz, max clock order = 2.
Hence, the fundamental freq is at |flo-fqpac|=0 and the second order harmonic at |flo - (frf-fqpac)|=2.399GHz (flo,frf are (1,-1) in the results window).
The result that I get is in the image and it looks like I'm doing something wrong.
Can somebody help me or pointing me in the right direction?
Thanks a lot, .mat
|