A Fully Integrated 0.2V 802.11ba Wake-Up Receiver with -91.5dBm Sensitivity
Jaeho Im, Jacob Breiholz, Shuo Li, Benton H. Calhoun, David D. Wenzloff
Abstract
A standalone, fully integrated 0.2V 578μW ultra-low voltage (ULV) 2.4GHz 802.11ba WiFi wake-up receiver (WRX) is presented. It includes a current-efficient ULV noise cancelling LNA with a high turn step-up transformer, and Q-enhanced RF gain stages for low noise figure. A 1/3 f <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">RF</sub> mixer and ULV FLL are implemented to reduce current. The chip includes micro-power managers for regulating all internal voltages from a single 0.2V supply. Fabricated in 40nm CMOS, the ULV WRX achieves -91.5dBm sensitivity at 10-3 BER and data-rate of 62.5kbps, while rejecting a 45dB adjacent blocker with only 0.2V supply. The WRX includes an energy-efficient 5ms startup sequence which interfaces to an external node controller over serial peripheral interface (SPI).