Patent ID: 8197406

Claim:
A device for measuring a property of living tissue, in particular a glucose level of the tissue, said device comprising an electrode arrangement for application to the tissue, a signal source for generating an AC voltage at a series of frequencies in a given frequency range to be applied to said electrode arrangement, and processing circuitry comprising measuring means for measuring a series of measurement values at the series of frequencies, each measurement value depending on dielectric properties of the tissue at one frequency, fitting means for fitting a function M(f, b 0 , . . . , b K ) with parameters b 0 to b K to the measurement values at their given frequencies, or to values derived from the measurement values at their given frequencies, and determining the parameters b 0 to b K thereby, and means for using at least part of the parameters b 0 to b K for determining said property, wherein said processing circuitry comprises a measuring circuit having a first input for an input value dependent on said property and on said AC voltage and a second input for an input value dependent on said AC voltage but substantially independent of said property, wherein said measurement values are derived from a ratio between said first and said second input value.