Wireless, remotely powered telemetry in 0.25μm CMOS

This new architecture for wireless power and data telemetry recovers power and system clock from a weak incident RF signal. An efficient RF-DC converter rectifies and multiplies the received signal generating a practical DC voltage, far higher than the incident RF signal amplitude, increasing the range between the. base station and the transponder. An injection locked LC oscillator recovers a system clock from the incident signal. Super-harmonic or sub-harmonic locking facilitates the separation of the incident and telemetry frequency without the need for a PLL. Experimental data from a 900MHz transponder and a remotely powered 2.3GHz wireless temperature sensor are presented. Both prototypes implemented in 0.25mum CMOS occupy less that 1MM(2).