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Design >> RF Design >> simultaneous noise and input power matching
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Message started by baab on Mar 16^th, 2014, 11:24pm

Title: simultaneous noise and input power matching
Post by baab on Mar 16^th, 2014, 11:24pm

Hi.

I just simulated optimum noise impedance Zopt = Ropt + jXopt as Vgs changes. And just realise that Zopt changes a lot as Vgs varies. However, this makes me really confused.
According to the simultaneous noise and input power matching procedure below, after steps 2 and 3, Zopt will be fixed.
However, in step 4, until at this time Vgs is chosen. And this will change Zopt.
It seems useless.
Please explain.

Title: Re: simultaneous noise and input power matching
Post by baab on Mar 16^th, 2014, 11:29pm

Here is the reference lecture:

http://ishare.edu.sina.com.cn/download.php?fileid=23307601%E2%80%8E