An injection locked, RF powered, telemetry IC in 0.25 /spl mu/m CMOS

This wireless transponder recovers power and a reference clock from an incident RF signal and returns data on a 900MHz carrier. A multi-stage voltage multiplier/rectifier converts the received low power RF signal to a useful DC voltage and stores the energy on a storage capacitor. The injection locking technique facilitates power efficient generation of a low phase noise 900MHz internal clock from the received 450MHz signal by employing a fully integrated low power LC oscillator. A fully integrated pseudodifferential power amplifier operating in class AB regime is used as the output stage of the system. The system dissipates an average of 5 /spl mu/A in standby mode and 1.1 mA during active operation.

[1]  K. Najafi,et al.  Low-power interface circuits for bio-implantable microsystems , 2003, 2003 IEEE International Solid-State Circuits Conference, 2003. Digest of Technical Papers. ISSCC..

[2]  T. Ohguro,et al.  The impact of scaling down to deep-submicron on CMOS RF circuits , 1998, Proceedings of the 23rd European Solid-State Circuits Conference.

[3]  K. Wise,et al.  A double-sided single-chip wireless pressure sensor , 2002, Technical Digest. MEMS 2002 IEEE International Conference. Fifteenth IEEE International Conference on Micro Electro Mechanical Systems (Cat. No.02CH37266).

[4]  J. F. Dickson,et al.  On-chip high-voltage generation in MNOS integrated circuits using an improved voltage multiplier technique , 1976 .

[5]  Y. Sugawara,et al.  A 13.56 MHz CMOS RF identification transponder integrated circuit with a dedicated CPU , 1999, 1999 IEEE International Solid-State Circuits Conference. Digest of Technical Papers. ISSCC. First Edition (Cat. No.99CH36278).

[6]  M. Tiebout,et al.  Low-power low-phase-noise differentially tuned quadrature VCO design in standard CMOS , 2001, IEEE J. Solid State Circuits.

[7]  Edgar H. Callaway,et al.  Wireless Sensor Networks: Architectures and Protocols , 2003 .

[8]  A. Hajimiri,et al.  Design issues in CMOS differential LC oscillators , 1999, IEEE J. Solid State Circuits.

[9]  Clive Poole.  Subharmonic injection locking phenomena in synchronous oscillators , 1990 .

[10]  Qiuting Huang,et al.  A 0.5mW passive telemetry IC for biomedical applications , 1998, Proceedings of the 23rd European Solid-State Circuits Conference.