This paper presents a novel design of 5th order direct delta-sigma receiver for multi-band multi-standard wireless applications. The receiver is designed to cover Frequency Division Duplex (FDD) bands from 0.4 GHz to 3.6 GHz with a configurable bandwidth of 3.84 MHz (WCDMA), and 9.0/13.5/18/37 MHz (LTE-10M/15M/20M/37M) complying with 3GPP specifications. The configuration is implemented and controlled by a digital controller. System modelling in MATLAB is carried out to tune the key design parameters aiming to optimize noise figure (NF) and linearity of the receiver. The post-simulation results of the receiver show a good match with that of the MATLAB receiver model, an NF of 2.5 dB, an in-band (IB) third-order intercept point (IIP3) of −15 dBm, an out-of-band (OOB) IIP3 of 0 dBm, and a peak signal-to-noise-and-distortion ratio (SNDR) of 58 dB. The receiver is designed in 65-nm CMOS technology with a 70 mA static current and a 1.2 V voltage supply.
