A 0.08mm2 1-6.2 GHz Receiver Front-End with Inverter-Based Shunt-Feedback Balun-LNA

An inverter-based active feedback CMOS LNA with balun function is within a direct converter receiver. The LNA has three gain stages. The Multi-gated transistor (MGTR) technique is employed to null the third-order distortion of the last two gain stages while complementary configurations are used to compensate second-order nonlinearity in all stages. The complete direct-conversion receiver was fabricated in 28nm CMOS. Measurement results indicate that the integrated receiver provides a minimum NF of 3.4 dB, and a maximum gain of 48.2 dB from 1 to 6 GHz. The in-band and out-of-band IIP3 are -10 dBm and -4 dBm, respectively. The receiver dissipates 22.2 mW at 5 GHz LO frequency and occupies an area of 0.08 mm
²
.