A batteryless wireless system uses ambient heat with a reversible-power-source compatible CMOS/SOI DC-DC converter

A 1mW, self-powered wireless system that utilizes ambient heat is described. A switched-capacitor DC-DC converter composed of fully-depleted SOI MOSFETs and a microthermoelectric module makes use of such heat possible. An experimental 300MHz band short-range wireless transmitter transmits from a distance of 5m using only heat from a hand or from water. The chip is fabricated in a 0.8/spl mu/m fully-depleted SOI process.

[1]  F. Utsunomiya,et al.  SOI circuit technology for batteryless mobile system with green energy sources , 2002, 2002 Symposium on VLSI Circuits. Digest of Technical Papers (Cat. No.02CH37302).

[2]  M. Kishi,et al.  Micro thermoelectric modules and their application to wristwatches as an energy source , 1999, Eighteenth International Conference on Thermoelectrics. Proceedings, ICT'99 (Cat. No.99TH8407).

[3]  H. Kyuragi,et al.  Ultralow-power CMOS/SOI LSI design for future mobile systems , 2002, 2002 Symposium on VLSI Circuits. Digest of Technical Papers (Cat. No.02CH37302).