JSSC 2015第6期RF & Wireless0.18μm

A4 5 W Injection-Locked FSK Wake-Up Receiver With Frequency-to-Envelope Conversi

一款用于无线体域网的超低功耗FSK唤醒接收器，采用0.18μm CMOS工艺，功耗仅45μW。

0.18μm CMOS, 0.7V, 312kb/s, 45μW

FSK唤醒接收器无线体域网超低功耗注入锁定频率校准

▸创新点1：注入锁定数字控制振荡器（IL-DCO）通过锁定输入信号频率实现超高增益和低功耗解调，在0.7V电源电压下仅消耗45μW，显著降低了传统FSK接收机的功耗复杂度。

▸创新点2：频率到包络转换技术通过IL-DCO将FSK信号的频率变化直接转换为幅度变化，简化了接收机架构，实现了312kb/s的数据速率，同时保持高能效。

▸创新点3：SAR自动校准算法无需外部组件即可快速校准IL-DCO的频率漂移，校准时间仅102秒且频率稳定性达0.25%，解决了晶体振荡器的高成本问题。

▸创新点4：整体系统采用80MHz载波的体信道通信（BCC）物理层，实现了单芯片1mm²的集成度，为WBAN应用提供了无晶振的稳定时钟解决方案。

Abstract

A dedicated ultra-low power fully integrated FSK wake-up receiver (WuRx) for wireless body area network (WBAN) is implemented in 0.18 m CMOS technology with 0.7 V supply voltage. For low power consumption, a body channel communi- cation (BCC) physical layer (PHY) is adopted with an 80 MHz carrier frequency. Moreover, an inje ction-locking digitally-con- trolled oscillator (IL-DCO) is used to provide an extraordinary gain and frequency-to-envelope conversion in the simple and power-efﬁcient envel