This paper proposes a surface-acoustic wave (SAW)less tunable RF front end (RF-FE) using an electrical-balance duplexer (EBD) integrated with a switched-LC N-path low-noise amplifier (LNA). The EBD cancels the transmitter-receiver (TX-RX) leakage at the RX frequency by dynamically optimizing the balance of a hybrid transformer, which enables in-band full-duplex (IBFD) operation. A transconductor-based LNA in parallel with a switched-LC N-path network creates input and output notches to reject TX leakage for frequency-division duplexing (FDD) operation. The LNA's signal-handling capability is enhanced via optimum switch biasing. Fabricated in 0.18-mu m SOI CMOS, the RF-FE offers > 50-dB tunable rejection from the TX port to LNA output at both TX and RX frequencies, for all 3GPP bands from 0.7 to 1 GHz (i.e., FDD case). It is the first tunable RF-FE including an LNA that achieves + 70-dBm TX-path IIP3, and <-100-dBm IM3 at + 20-dBm TX power when a full-duplex spaced jammer is applied at the antenna (FDD case). It is also the first to handle >+ 30-dBm in-band TX power while cancelling the self-interference by > 50 dB (i.e., IBFD case). The RF-FE consumes 62.5 mW at 1 GHz with 11.7-dB RX cascaded NF, 3.6-dB TX insertion loss, and 9.62 mm(2) active area.