A 2.5GHz BiCMOS low noise and high-gain differential LNA for WLAN receiver

A 2.5 GHz BiCMOS differential LNA for WLAN front-end receiver is presented. The LNA is fabricated with a JAZZ 0.35 ¿m 1P4M SiGe BiCMOS process. The LNA provides a 50 ¿ input impedance and achieves good temperature characteristic. In the point of 2.5 GHz, the LNA exhibits a maximum small signal voltage gain of 29.1 dB, noise figure of 1.316 dB, input/output return loss better than 11 dB, and input IIP3 of -0.241 dBm, respectively. The LNA consumes 3.7 mA of current from a 3.0 V DC supply.