Design of high stability factor LNA using cascade mosfet at 850MHz Rf frequency

Abstract

Controlling noise is the primary effort in any amplifier. LNA (Low Noise Amplifier) will control the noise in front panel of amplifier stage as per FRISS law. Instead of single MOS in LNA, cascaded the MOS generates the stability factor in a better way in 850MHz RF frequency at load impedance of 50Ω. But additionally capacitor inserted cascaded MOS will pull down the stability factor. Cascasded MOS LNA have a stability factor of 1.387 and Noise Figure(dB) of 0.518.