A tunable multi-band/multi-standard receiver front-end supporting LTE

Abstract

Current wireless communication devices demand multi-band/multi-standard receiver that can access all the available services specifications. This work introduces a tunable receiver front-end for multi-band multi-standard applications. The receiver adopts a down-conversion quadrature band-pass FIR charge sampling mixer tuned via its controlling clocks. A time varying impedance matching network provides further selectivity. The architecture is simulated over three different frequencies spanning two octaves (2G, 1G and 500MHz) targeting LTE specifications. The proposed design is tested across process corners and post layout. Simulations result in Noise Figure of 7.5 to 9 dB, out-of-band IIP3 of -1.9 to -7 dBm, in-band IIP3 of -1.5 to -10 dBm and S11 <-10dB. The design is implemented using 65nm CMOS technology.