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Design >> RF Design >> Low Noise Amplifier Design
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Message started by prameela on Feb 22^nd, 2017, 1:54am

Title: Low Noise Amplifier Design
Post by prameela on Feb 22^nd, 2017, 1:54am

I am working with a Low Noise Amplifier (LNA) design using gpdk 180 technology from cadence.The simulations are done in cadence virtuoso Spectre in 2-3GHz range at 1.8V supply. I have the following queries.

1. Whether a Noise Figure less than 1dB(simulated) is an acceptable value?

2. I am using simple 'nmos' in the gpdk library. Whether I have to use the foundry library or RF library?

3. For layouting the LNA whether the gpdk library is suitable. ( I have done the post layout simulation of the LNA. But I am getting a negative gain and very high value of NF)

Title: Re: Low Noise Amplifier Design
Post by Hammad33 on Mar 13^th, 2017, 10:35pm

For your first question, many practical LNAs (good ones) have NF less than 1 dB. So, yes in simulation, an LNA can have less than 1 dB NF.