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A New Transponder Architecture With On-Chip ADC for Long-Range
提出一种新型无线能量与数据遥测架构，通过高效RF-DC转换器和注入锁定LC振荡器实现远距离通信。
0.25μm CMOS, 3V供电, 900MHz载波, 18米通信距离
无线能量传输数据遥测RF-DC转换器注入锁定振荡器远距离通信
▸高效RF-DC转换器从弱RF信号中提取能量
▸注入锁定LC振荡器无需PLL生成系统时钟
▸集成片上ADC实现长距离遥测
Abstract
We present a new architecture for wireless power and data telemetry that recovers power and a system clock from a weak incident RF signal. A high-efficiency RF–DC converter generates a 3-V /68/67supply for the system from a 12.3-dBm incident RF signal, gathered by a commercial 50- /10antenna. A system clock is extracted from the same incident signal, by an injection-locked LC oscillator. Sub-harmonic injection-locking facilitates the sepa- ration of the incident and the transmit signal frequencies, without need for a PLL. The proposed architecture is used in a long-range telemetry device, incorporating an on-chip ADC, and employing active telemetry for data transmission. Data is transmitted through binary phase-shift-keying of a 900-MHz carrier. The prototype, implemented in 0.25- m CMOS, occupies less than 1 mm/50. A wire- less operation range of more than 18 meters is indicated by ane- choic chamber testing.