Title :
SAW-Less Analog Front-End Receivers for TDD and FDD
Author :
Fabiano, I. ; Sosio, M. ; Liscidini, Antonio ; Castello, Rinaldo
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Univ. of Pavia, Pavia, Italy
Abstract :
A multistandard SAW-less receiver is designed exploring a current-mode architecture. A class-AB common-gate transformer-based low-noise transconductor amplifier (LNTA) is used to provide high linearity and harmonic filtering. A resonant passive mixer is adopted in order to allow the current-mode operation and improve the harmonic rejection. A low-power divider with intrinsic 25% duty-cycle is introduced to drive the passive mixer. A second-order Rauch biquad with complex poles makes-up the IQ blocker tolerant baseband. The receiver is designed to be suitable for SAW-less TDD and typical FDD applications with 3.8 and 1.9 dB of NF and > 18 and > 16 dBm of IIP3, respectively, using only 32 mW for each receiver.
Keywords :
code division multiple access; frequency division multiplexing; low noise amplifiers; mixers (circuits); surface acoustic wave devices; time division multiplexing; FDD applications; IQ blocker tolerant baseband; LNTA; Rauch biquad; SAW-less TDD; SAW-less analog front end receivers; class AB common gate transformer; current mode architecture; current mode operation; duty cycle; harmonic filtering; harmonic rejection; low noise transconductor amplifier; low power divider; multistandard SAW-less receiver; resonant passive mixer; Coils; Harmonic analysis; Impedance; Mixers; Noise; Noise measurement; Receivers; 25% duty cycle; GSM; SAW-less; UMTS; W-CDMA; baseband; blocker tolerant; current-mode; direct conversion; divider; dynamic range; frequency-division duplexing (FDD); harmonic mixing; linearity; low power; low-noise transconductor amplifier (LNTA); noise folding; reciprocal mixing; resonant mixer; time-division duplexing (TDD);
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2013.2271859
