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Hello Sir, Frankly speaking I am just trying to build (simulate) LNA and obtain the S parameters and power gains. I have not given a thought to what my actual load will be.
If i need to get S21, what needs to be done.
Regarding AC simulation - if i connect any high impedance load (lets say...
Hi, Thank you for your reply.
Yes, Id is indeed 5.69mA. Sorry for the typo error.
You are right, I am using parallel LC tank circuit at the cascade transistor that will offer infinite impedance and i am matching it with output port with 50Ohms resistance. Thank you very much.
I request one...
I am designing LNA for GPS application (1.57GHz) using cadence virtuoso (IC616) and Spectre (MMSIM131) tool. Circuit is attached.
My topology is inductive source degeneration. I am able to match the input and output of LNA to 50 Ohms input and output port respectively with S11 = -18dB and S22...
Hi FvM, please let me know how do i go about setting the bias point. It will be really helpful.
Hi Frankrose, i noticed this mistake myself, i tried connecting the C0 left of R1 so that input sees a 10K resistor but no success.
getting incorrect s-parameters (S21 & S12) for LNA design
I am designing LNA for GPS (1.57Ghz), i am getting reasonable S11 and S22 = -10dB and -14dB respectively but my S21 is always coming as equal to S12 (i.e. S12 = S21 = -3dB).
Attached is my circuit and S-parameters analysis.
Can...
Hi,
I am designing LNA for GPS applications (1.57Ghz) using inductive source degeneration topology, circuit is attached. I mathematically calculated the values of Cgs, gm for the gain transistor taking Q = 4 and Rs - 50Ohms. Using this i calculated the value of Lg, Ls & W/L ratio of gain...
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