A 2.8-to-8.5mW GSM/bluetooth/UMTS/DVB-H/WLAN fully reconfigurable CTΔΣ with 200kHz to 20MHz BW for 4G radios in 90nm digital CMOS

Abstract

A 0.4mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> low-power fully-reconfigurable continuous-time (CT) feedforward ΔΣ ADC for 4G radios is implemented in 90nm CMOS. By reconfiguring the topology architecture, quantizer bits, biasing current and component parameters, optimal power consumption can be achieved for every mode. The modulator achieves a DR of 85/78/76/72/58dB for GSM/BT/UMTS/DVB-H/WLAN with 2.8/2.6/3.6/4.9/8.5mW from 1V supply. The FOM is 0.68/0.5/0.28/0.27/0.41pJ/conv.