BioLC-Oscillator: A Self-Powered Wireless Glucose-Sensing System with the Glucose Dependent Resonance Frequency

Abstract

A stand-alone wireless glucose-sensing system can be constructed by combining a biofuel cell and a transmitter that sends signals to the receiver using only the power generated in the biofuel cell without any external power source. However, the inherent low power supply of biofuel cells limits its application as a power source for signal transmittance. We have previously reported a novel device, called a “BioCapacitor.” In this study, we report a stand-alone, self-powered, wireless glucose sensing system called a “BioLC-Oscillator.” A BioLC-Oscillator is composed of a BioCapacitor and voltage controlled oscillator (VCO) circuits, whose resonance frequencies depend on the input voltage level. We succeeded in constructing a stand-alone, self-powered, wireless glucose sensing system called the BioLC-Oscillator by using a radio transmitter in which the radio wave resonance frequency changes according to glucose concentration within the range from 0.86 to 10.1 mM, which covers from the hypoglycemic range to a part of the hyperglycemic range.