Low power high gain CMOS LNA based on inverter cell and self-body bias for UWB receivers

摘要

A low-power low-noise amplifier (LNA) utilized a resistive inverter configuration feedback amplifier to achieve the broadband input matching purposes. To achieve low power consumption and high gain, the proposed LNA utilizes a current-reused technique and a splitting-load inductive peaking technique of a resistive-feedback inverter for input matching. Two wideband LNAs are implemented by TSMC 0.18 μm CMOS technology. The first LNA operates at 2-6 GHz. The minimum noise figure is 3.6 dB. The amplifier provides a maximum gain (S_(21)) of 18.5 dB while drawing 10.3 mW from a 1.5-V supply. This chip area is 1.028 × 0.921 mm~2. The second LNA operates at 3.1-10.6 GHz. By using self-forward body bias, it can reduce supply voltage as well as save bias current. The minimum noise figure is 4.8 dB. The amplifier provides a maximum gain (S_(21)) of 17.8 dB while drawing 9.67 mW from a 1.2-V supply. This chip area is 1.274 × 0.771 mm~2.