Highly linear TIA for SAW-less FDD receivers

摘要

A highly linear trans-impedance amplifier TIA is proposed to meet stringent linearity requirements of SAW-less frequency-division duplexing (FDD) LTE receivers with 20MHz channel bandwidth. In the proposed solution the operational amplifier is compensated exploiting the passive feedback network in order to achieve wide bandwidth and low power dissipation. The prototype in 28nm CMOS achieves 14dB of gain with 20MHz bandwidth and features 46 dBm IIP3 and 12μV in-band noise, with 5.4mW power dissipation and a filter FOM of 183 dB.