[SOLVED] What is active biasing in LNA design?

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rula

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HI,
I am interested in a LNA design using BJT for low noise.
I am told to use an active biasing to minimise the noise figure and also have a lower VSWR ratio.

Does anyone have idea what is active biasing and where can I find information on it?
Thanks for the help
Rula
 

Re: LNA design

The term active biasing means that you are using transistors that are operates in active region to bias you’re LNA, i.e. LDO or op Amp buffer…
I hope that this helps.
Bouchy
 

Re: LNA design

You are wrong.... I did not ask about biasing in active region. I am referring to biasing method...active biasing....
 

Re: LNA design

Sorry for my miss understanding.
Good luck,

bouchy
 

Re: LNA design

Active bias is used to maintain performance over PVT variations.

You may wanna read this paper:

A 2.7-V gsm rf transceiver IC, JSSC december 1997
 

LNA design

the active biasing , it to use , other active device to bias ur LNA , this decice could be current mirror , current soure band gap reffernce

khouly
 

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