A-90dbm Sensitivity 0.13 Mu M Cmos Bluetooth Transceiver Operating In Wide Temperature Range

A 2.4GHz 0.13 mu m CMOS transceiver achieving high RX sensitivity and high-quality TX signals between -40 degrees C and +90 degrees C is presented. A low-IF receiver and direct-conversion transmitter architecture is employed. A temperature compensated receiver chain including LNA achieves a sensitivity of -89.6dBm even in the worst environmental condition. Linearity optimization for the transmitter chain including a variable biasing circuit in PA reduces the second harmonics of TX signals so that it suppresses the VCO pulling and keeps the carrier frequency drift within 18kHz.