System for Measuring Electric Signals
First Claim
1. A sensor system for measuring an electric potential of interest generated by a distant source in a body in the presence of locally produced artifacts comprising:
- a first sensor placed at a first measurement location for detecting the electric potential of interest and generating a first electrical signal possibly representative of the electric potential of interest;
a second sensor placed at a second measurement location near the first sensor for detecting the electrical potential of interest and generating a second electrical signal possibly representative of the electric potential of interest;
a comparator for comparing the first and second electrical signals to produce a comparison result; and
an electronic circuit for determining if the comparison result suggests that the first and second electrical signals represent the electric potential of the source of interest or locally produced artifacts.
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Accused Products
Abstract
A system for determining if signals present at bioelectric sensors derive from an intended source or from different, localized sources or artifacts includes a first sensor placed to detect the electric potential of interest and generate a first electric signal possibly representative of the electric potential of interest and a second sensor placed near the first sensor and preferably a relatively large distance away from the source. The second sensor detects the electrical potential of interest and generates a second electrical signal which also possibly represents the electrical potential of interest. An electronic circuit determines whether a difference between the electrical signals exceeds a certain threshold, thus indicating that either one or both of the signals is a measure of an artifact and not the electric potential of interest.
62 Citations
28 Claims
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1. A sensor system for measuring an electric potential of interest generated by a distant source in a body in the presence of locally produced artifacts comprising:
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a first sensor placed at a first measurement location for detecting the electric potential of interest and generating a first electrical signal possibly representative of the electric potential of interest; a second sensor placed at a second measurement location near the first sensor for detecting the electrical potential of interest and generating a second electrical signal possibly representative of the electric potential of interest; a comparator for comparing the first and second electrical signals to produce a comparison result; and an electronic circuit for determining if the comparison result suggests that the first and second electrical signals represent the electric potential of the source of interest or locally produced artifacts. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A sensor system for measuring an electric potential of interest generated by a distant source in a body in the presence of locally produced artifacts comprising:
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a first sensor placed at a first measurement location for detecting the electric potential of interest and generating a first electrical signal possibly representative of the electric potential of interest; and a second sensor placed at a second measurement location near the first sensor for detecting the electric potential of interest and generating the second electrical signal possibly representative of the electric potential of interest; means for comparing the first and second signals and generating a comparison result; and means for determining if the comparison result suggests that the first and second signals are sufficiently similar to each other that they describe the electrical potential of interest as opposed to some locally produced artifacts. - View Dependent Claims (17, 18, 19, 20, 21)
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22. A method of measuring an electric potential of interest generated by a relatively distant source in a body in the presence of locally produced artifacts comprising:
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generating a first electrical signal at a first measurement location possibly representative of the electric potential of interest; and generating a second electrical signal at a second measurement location possibly representative of the electric potential of interest; comparing the first and second electrical signals to produce a comparison result; and determining from the comparison result which portions of the first and second electrical signals actually represent the electrical potential of interest and which portions represent locally produced artifacts. - View Dependent Claims (23, 24, 25, 26, 27, 28)
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Specification