A 460MHz∼870MHz CMOS wideband low noise amplifier for DVB-T

This paper focuses on a wideband low noise amplifier (LNA) for DVB-T fabricated with the TSMC 0.18 mum CMOS process. The proposed wideband LNA, from 460 MHz to 870 MHz, achieves a wideband and flat gain property by using the resistive feedback technique. Compared with other wideband LNAs, the proposed circuit can achieve a flatter gain curve, a flatter IIP3 in band, and a small chip area. The overall power gain of the proposed LNA is 21.5 dB to 21.8 dB. It simply varies 0.3 dB in band. Sll is smaller than -12.7 dB, and S22 is smaller than -12 dB. Noise Figure (NF) is 3 dB~4.7 dB, and IIP3 is -5 dBm~-5.6 dBm in band.