Method and apparatus for measuring bioimpedance
First Claim
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1. An apparatus to measure a bioimpedance, the apparatus comprising:
- a first electrical signal generator configured to generate a first electrical signal to measure a bioimpedance of an object;
a compensation signal generator configured to generate a compensation signal to compensate a biosignal generated based on the first electrical signal and the bioimpedance; and
an amplifier configured to amplify the compensated biosignal,wherein the compensation signal corresponds to impedance of interface between electrodes and the object,wherein the compensation signal generator comprises a second electrical signal generator configured to generate a second electrical signal comprising a phase identical to or opposite to a phase of the first electrical signal and adjust an amplitude of the second electrical signal based on comparison of an amplitude of the compensation signal and a predetermined threshold range, and the compensation signal generator is configured to generate the compensation signal in response to the second electrical signal flowing from the electrodes into the object.
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Abstract
A method and an apparatus for measuring a bioimpedance are disclosed. The apparatus includes a first electrical signal generator configured to generate a first electrical signal to measure a bioimpedance of an object. The apparatus also includes a compensation signal generator configured to generate a compensation signal to compensate a biosignal measured based on the first electrical signal, and an amplifier configured to amplify the compensated biosignal.
17 Citations
16 Claims
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1. An apparatus to measure a bioimpedance, the apparatus comprising:
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a first electrical signal generator configured to generate a first electrical signal to measure a bioimpedance of an object; a compensation signal generator configured to generate a compensation signal to compensate a biosignal generated based on the first electrical signal and the bioimpedance; and an amplifier configured to amplify the compensated biosignal, wherein the compensation signal corresponds to impedance of interface between electrodes and the object, wherein the compensation signal generator comprises a second electrical signal generator configured to generate a second electrical signal comprising a phase identical to or opposite to a phase of the first electrical signal and adjust an amplitude of the second electrical signal based on comparison of an amplitude of the compensation signal and a predetermined threshold range, and the compensation signal generator is configured to generate the compensation signal in response to the second electrical signal flowing from the electrodes into the object. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus to measure a bioimpedance, the apparatus comprising:
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switches configured to adjust connections between electrodes electrically connected to the object, the electrical signal generator, and the amplifier; a first electrical signal generator configured to generate a first electrical signal to measure a bioimpedance of an object according to the adjusted connections; a compensation signal generator configured to generate a compensation signal to compensate a biosignal generated based on the first electrical signal and the bioimpedance; and an amplifier configured to amplify the compensated biosignal, wherein the compensation signal generator comprises a second electrical signal generator configured to generate a second electrical signal comprising a phase identical to or opposite to a phase of the first electrical signal and adjust an amplitude of the second electrical signal based on comparison of an amplitude of the compensation signal and a predetermined threshold range, and the compensation signal generator is configured to generate the compensation signal in response to the second electrical signal flowing from the electrodes into the object. - View Dependent Claims (11)
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12. A method of measuring a bioimpedance, the method comprising:
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generating a first electrical signal to measure a bioimpedance of an object; generating a compensation signal to compensate for a biosignal generated based on the first electrical signal and the bioimpedance; and amplifying the compensated biosignal, wherein the compensation signal corresponds to impedance of interface between electrodes and the object, wherein the generating a compensation signal comprises generating a second electrical signal comprising a phase identical or opposite to a phase of the first electrical signal, adjusting an amplitude of the second electrical signal based on comparison of an amplitude of the compensation signal and a predetermined threshold range, and generating the compensation signal in response to the second electrical signal flowing from the electrodes into the object. - View Dependent Claims (13, 14, 15, 16)
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Specification