METHOD UTILIZING TWO WIRE ELECTRODE OSCILLATOR SYSTEM FOR DETERMINING BODY IMPEDANCE
First Claim
1. A method for calibrating an apparatus for determining body impedance having first and second electrodes being suitable for being electrically coupled to the body, comprising:
- determining a first period of oscillation for the apparatus associated with an open circuit condition between the electrodes; and
determining a second period of oscillation for the apparatus associated with a short-circuit condition between the electrodes;
wherein, the first period of oscillation is indicative of a first calibration value, and the second period of oscillation in combination with a slope coefficient is indicative of a second calibration value.
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Accused Products
Abstract
A method for measuring an impedance of a body includes the steps of electrically coupling first and second electrodes to the body and electrically biasing a variable frequency relaxation oscillator. The oscillator has both a positive resistive feedback network and a negative feedback network which includes the electrodes. The method further includes a step of measuring the period of oscillation of the variable frequency oscillator. The measured period of oscillation is indicative of the impedance of the body.
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Citations
17 Claims
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1. A method for calibrating an apparatus for determining body impedance having first and second electrodes being suitable for being electrically coupled to the body, comprising:
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determining a first period of oscillation for the apparatus associated with an open circuit condition between the electrodes; and determining a second period of oscillation for the apparatus associated with a short-circuit condition between the electrodes; wherein, the first period of oscillation is indicative of a first calibration value, and the second period of oscillation in combination with a slope coefficient is indicative of a second calibration value. - View Dependent Claims (2, 3)
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4. A method for measuring an impedance of a body, comprising:
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electrically coupling first and second electrodes to the body; electrically biasing a variable frequency relaxation oscillator having both a negative feedback network comprising said electrodes, and a positive resistive feedback network; and measuring the period of oscillation of said variable frequency oscillator, wherein the measured period of oscillation is indicative of the impedance of the body. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification