A 0 dBm IIP3, 23.5 dB Gain,1.9 dB NF, ESD Protected Wideband Programmable LNA for Multi-band Navigation Receiver Front-End

This paper represents a digitally controlled, gain programmable SiGe BiCMOS low noise amplifier operating at 1-1.8 GHz used in multi-band navigation receiver front-end. An inductively degenerated common emitter LNA with an off-chip second order band-pass filter is adopted to achieve wideband input impedance matching without degrading much noise performance. The current splitting technique is used which doesn´t affect the input impedance matching and the gain flatness of the LNA when gain varies. The simulation results show a 23.5 dB maximum gain with noise figure of 1.9 dB and IIP3 of 0 dBm. The LNA can be tuned from 3.5 dB to 23.5 dB, only drawing 3.8 mA current from 3.3 V power supply.