半导体学报2011，Vol.32Issue(6)：111-118,8.DOI:10.1088/1674-4926/32/6/065008
An ultra-low-power RF transceiver for WBANs in medical applications*
An ultra-low-power RF transceiver for WBANs in medical applications*
摘要
Abstract
A 2.4 GHz ultra-low-power RF transceiver with a 900 MHz auxiliary wake-up link for wireless body area networks (WBANs) in medical applications is presented. The RF transceiver with an asymmetric architecture is proposed to achieve high energy efficiency according to the asymmetric communication in WBANs. The transceiver consists of a main receiver (RX) with an ultra-low-power free-running ring oscillator and a high speed main transmitter (TX) with fast lock-in PLL. A passive wake-up receiver (WuRx) for wake-up function with a high power conversion efficiency (PCE) CMOS rectifier is designed to offer the sensor node the capability of work-ondemand with zero standby power. The chip is implemented in a 0.18 μm CMOS process. Its core area is 1.6 mm2.The main RX achieves a sensitivity of-55 dBm at a 100 kbps OOK data rate while consuming just 210μA current from the 1 V power supply. The main TX achieves +3 dBm output power with a 4 Mbps/500 kbps/200 kbps data rate for OOK/4 FSK/2 FSK modulation and dissipates 3.25 mA/6.5 mA/6.5 rnA current from a 1.8 V power supply.The minimum detectable RF input energy for the wake-up RX is -15 dBm and the PCE is more than 25％.关键词
ultra-low-power/ RF transceiver/ fast lock-in PLL/ passive wake-up receiver/ on-off keying/ frequency shift keyingKey words
ultra-low-power/ RF transceiver/ fast lock-in PLL/ passive wake-up receiver/ on-off keying/ frequency shift keying引用本文复制引用
Zhang Qi,Kuang Xiaofei,Wu Nanjian..An ultra-low-power RF transceiver for WBANs in medical applications*[J].半导体学报,2011,32(6):111-118,8.基金项目
Project supported by the National High-Tech Research and Development Program of China (Nos.2008AA010703,2009AA011606) and the National Natural Science Foundation of China (No.60976023). （Nos.2008AA010703,2009AA011606）
