A 28.5dBm 3.3V/1.1V All-Digital Wi-Fi 7 Polar Transmitter employing Triple-Stacked Doherty Class-G SC-DPA in 14 nm Fin-FET

This work presents a novel class G topology that enables reliable triple-transistor stacking dual-supply in Switched-Capacitor Digital Power Amplifier working from 3.3/1.1 V. A glitch-free logic for smooth supply mode switching was implemented. A 28.5dBm/31.6% dual-core Doherty combining DPA at 2.3-2.6GHz was integrated in an all-digital polar transmitter using 14-nm Fin-FET node. An error vector magnitude (EVM)/power efficiency of -38dB/19% is measured at 2.412GHz and 7.3-dB backoff (dBBO) from Pmax, thus meeting MCS13 4096-QAM OFDM Wi-Fi7 requirement.