For cmos LNA building LC tank in AWR

[eses23]

Cmos LNA Design Example in AWR

I want to design a cmos LNA circuit in AWR. I built in AWr and run.But I can't obtain reasonable result. I think I can't choose the right element.Could someone give me an example circuit,Please?

 

[BigBoss]

Re: Cmos LNA Design Example in AWR

What kind of LNA ???
Frequency, Gain, Linearity, Noise Level, Wideband/Narrowband, Topology, Process etc. etc... ??

Please don't ask such questions that carry any information at all...

 

[eses23]

Re: Cmos LNA Design Example in AWR

Sorry, I wrote this informations the previous post. So,I couldn't think that. I used 180nm Cmos process and apply the folded cascode LNA with Mds Technique (modified derivative superposition). The center frequency is 5GHz. I import the spice netlist in Awr, Level 49. I obtain some values but the gain is very odd. So I think that all circuit is wrong. (S21(gain)=-2.798dBm,S11=-11,355dBm,S22=-20.21dBm,Noise figure=2.278dBm,IIP3=12.76dBm).These are my results.

 

[BigBoss]

Re: Cmos LNA Design Example in AWR

Sorry, I wrote this informations the previous post. So,I couldn't think that. I used 180nm Cmos process and apply the folded cascode LNA with Mds Technique (modified derivative superposition). The center frequency is 5GHz. I import the spice netlist in Awr, Level 49. I obtain some values but the gain is very odd. So I think that all circuit is wrong. (S21(gain)=-2.798dBm,S11=-11,355dBm,S22=-20.21dBm,Noise figure=2.278dBm,IIP3=12.76dBm).These are my results.

S-Parameters are not defined being as "dBm".
Your results are really unaccepable, there should be a biasing or matching errors or something else.It's you who will correct these results.
There also might be a importing netlist errors while translating into AWR because AWR interprets this netlist in according with its own netlisting procedure.Drawing the circuit again onto AWR will give you an insight.

 

[eses23]

Re: Cmos LNA Design Example in AWR

Sorry, I wrote these accidentally. S11,S22 and S21 are dB. Do you have any circuit example. If you will give me an example circuit,I can compare with mine.

 

[eses23]

My Cmos LNA circuit's has an LC tank. I don't know which element should I use for inductor and capacitor. For capacitor can I use varactor? And If I can use a vcap, how can I import the data file of vcap?