A 22 nm CMOS 2.4 GHz 40.91 dB voltage gain RX front-end design

This briefing introduces a receiver (RX) front-end integrated with a virtual switch-based transmit/receive switch (TRSW) and a reconfigurable capacitor cross-coupled low noise amplifier (LNA) that employs the gain control scheme of direct shunt. Simulation and testing results indicate that the TRSW has an insertion loss of 0.2 dB and an isolation of 30 dB. The LNA achieves a maximum voltage gain of 40.91 dB or a power gain of 31.91 dB, a minimum S11 of −18.5 dB, and an input third-order intercept point of −22 dBm. The LNA consumes 2 mA from a 0.9 V power supply and has a minimum NF of 2.97 dB.