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Design >> RF Design >> Figure of merit for wideband low noise amplifier
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Message started by saam on Nov 23^rd, 2010, 9:17pm

Title: Figure of merit for wideband low noise amplifier
Post by saam on Nov 23^rd, 2010, 9:17pm

Hello
Can anyone give the formula for the Figure of merit(FOM) for wideband low noise amplifier for wimax applications.

ThankU
saam

Title: Re: Figure of merit for wideband low noise amplifier
Post by carlgrace on Dec 1^st, 2010, 4:03pm

There are many figures of merit available. What performance metric are you interested in? NF? IIP3? Gain?

Title: Re: Figure of merit for wideband low noise amplifier
Post by aaron_do on Dec 1^st, 2010, 5:52pm

Hi,

are you talking about one FOM to try and summarize the total performance of the LNA? If so, there is no perfect FOM. However, I have seen some very bad FOMs around. So as a suggestion, when you are deciding your FOM, it should be based on real tradeoffs in the circuit design. It doesn't make sense for you FOM to have something like VoltageGain(dB)/PowerConsumption(mW) because voltage gain in dB is not proportional to power consumption in mW.

cheers,
Aaron