A 14.7mW Blocker-Tolerant Wideband Receiver Using a Transformer-Based N-Path Passive-LNA and a 2^nd-Order TIA Achieving 110MHz RF-BW and 13dBm OB-IIP3

To underpin high-speed wireless communication in the sub-6GHz bands, especially for the 5G New Radio (NR) and towards the 6G standards, RF receivers (RXs) are evolved to support a wide signal bandwidth (BW) (e.g. 100MHz in 5G-NR), cover a wide RF spectrum, and become more resilience to out-of-band (OB) blockers. In [1], the mixer-first RX (Fig. 1, upper) supports a wide range of RF and has a high linearity (27 dBm OB-IIP3) by delaying the signal amplification to baseband (BB). This topology yet sacrifices the NF $(5.5 \mathrm{~dB})$ and power consumption $(60 \mathrm{~mW})$ due to no RF gain. In [2], the LNTA-based RX (Fig. 1, upper) attains a better tradeoff between NF (2.2dB) and power consumption (40 mW) with an RF gain, but at the expense of linearity (5 dBm OB-IIP3) and active area $\left(0.8 \mathrm{~mm}^{2}\right.$). In [3], the gainboosted N-path mixer-first RX (Fig. 1, lower) exhibits 2.9dB NF and 8 dBm OB-IIP3 with only 11 mW power consumption. Yet, the RF passband BW is limited to $\sim 4 \mathrm{MHz}$, hindering its applications on the standards such as 5G-NR. In addition, the RF coverage of the RXs [1]–[3] is limited by the input capacitance.