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some question about gilbert cell in ADS

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laperla

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Hi friend

I have some question about designing of gilbert cell.
1- what are RF power and LO power affect in the cirtcuit?

2- how can I choise them? ( what are the best value for them? )
 

You already posted a similar question about gilbert cell and got some answers:
How can I find basic information about gilbert cell?

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Click to expand...

this was my previouse post unfortunately that informations don't relat to my new post!!!!
 

Just do simulation in ADS, and maybe you will get answer.
You should make sure that the gilbet model in ADS is as close as possible to the real component.
 

I did it but I couldn't find my problem
when I RFPower=-10db , gain is so different from RFpower=10dB???why?????
 

check the P1dB point , maybe RF=+10dBm cause the mixer saturated. IIP3 is IM3 of input, that is always about 10dB greater than input P1dB.
 

thanks for reply

another problem
in this design, I can obtain and draw C.G but I don't know why the noise figure is zero?

 

no one here to help me!!!!!!!!!!1
 

I want to know how I can realize that MOS in saturation or linear( in ADS)?
 

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