An Ultra-Low-Power Capacitive Stacking Receiver Front-End with a PVT-Robust Switched-Capacitor-Based Feed-Forward IM3 Cancellation Technique

This work presents an ultra-low-power mixer-first receiver front-end with capacitive stacking and a PVT-robust switched-capacitorbased feed-forward IM3 cancellation scheme. The proposed architecture employs an IF switched-capacitor (SC) network and an auxiliary Gm stage to realize accurate capacitive-stacking-defined gain, achieving nearly 19dB IIP3 enhancement without calibration. The proposed design consumes 0.96 mW under 0.9-V supply, and achieves 46-dB gain, 5.5-dBNF, and 0-dBm IIP3 at a near-band frequency offset (Δf/BW= 3).