didac
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There's a million ways to see the things in life
Posts: 247
manresa,spain
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Hi, As ACWWong say Q depends on your design criteria, so it's better to choose a Q as Q=f0/BW and take into account the component variations, the L-match doesn't give you enough degrees of freedom to design, maybe it's useful to study a pi or T matching network, because having to redesign the transconductance stage to fullfill matching criteria it's not very optimum. For the intrinsic gain of your mixer it depends really on your specs(are you worried about power consumption?,which specs do you have in NF ,linearity,gain?), I find it is a low gain for an active mixer but all goes to your specs and power budget so judge if it is a successful design or not it's up to you, the only thing I can say is that if you are designing as a low noise Mixer to eliminate the LNA take into account Friis, the noise it's determined by the first stage noise sure but it needs Gain to reduce subsequent stages contribution. Hope it helps,
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