Abstract
In the first part of this thesis, an ultra-wideband (UWB) LNA is proposed. The input matching of this circuit used a LC Ladder with current-reused so that this topology is suitable for low voltage. Using current-reused to amplify RF signal. Therefore, the proposed LNA can simultaneously achieve input impedance matching and high gain. The simulated results:-10dB input and output return loss, minimum noise figure of 3.3dB, and maximum gain of 14.3dB from 17.75mW. In the second part, a 9-26GHz LNA using 0.18um technology different from 3.1-10.6 GHz (In general, the 0.18um CMOS LNA usually be designed for 3−10GHz operating range.) is proposed. The design of this circuit used L and R-C matching to achieve wideband and low noise figure. The simulated results:-10dB input and output return loss, low noise figure, and high gain at different bias voltage.
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