Device and method for sensing electrical activity in tissue
First Claim
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1. A method for sensing electrical activity in tissue of a user in an environment which can cause electrical noise in electronics, comprising:
- detecting the electrical activity from the tissue between a first point and a second point on skin of the user and generating a voltage signal in response thereto which contains a signal of interest and undesired signals;
amplifying the voltage signal to amplify the signal of interest and undesired signals without substantially amplifying the noise, the amplification resulting in an output signal.
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Abstract
An exemplary embodiment providing one or more improvements includes apparatus and methods for sensing electrical activity in tissue of a person in a manner which is substantially limits or eliminates interference from noise in a surrounding environment.
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Citations
75 Claims
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1. A method for sensing electrical activity in tissue of a user in an environment which can cause electrical noise in electronics, comprising:
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detecting the electrical activity from the tissue between a first point and a second point on skin of the user and generating a voltage signal in response thereto which contains a signal of interest and undesired signals;
amplifying the voltage signal to amplify the signal of interest and undesired signals without substantially amplifying the noise, the amplification resulting in an output signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for sensing electrical activity in tissue of a user in a noise environment subjected to electrical noise, comprising:
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connecting a sensor electrode with skin of the user at a first point;
connecting a reference electrode with skin of the user at a second point which is in a spaced apart relationship to the first point to allow the sensor electrode to sense the electrical activity in the tissue at the first point relative to the second point; and
providing an amplifier which is configured to amplify the electrical activity while substantially reducing the influence from the noise environment. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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45. A sensor circuit for sensing electrical activity in tissue of a user and isolating and amplifying a signal of interest from the sensed electrical activity, the circuit comprising:
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a sensor electrode for placing on skin of the user at a first point;
a reference electrode for placing at a second point which is a distance away from the first point to allow the sensor electrode to sense the electrical activity and to produce a voltage signal relative to the second point which includes the signal of interest in response; and
an electronic module comprising;
a power source with positive and negative source voltages and a source reference voltage which is electrically connected to the reference electrode;
an amplifier connected to receive power from the power source and to receive the voltage signal from the sensor electrode and the power source reference voltage, and wherein the amplifier produces an output signal which is proportional to the voltage signal relative to the power source reference voltage; and
a filter portion which receives the output signal from the amplifier and attenuates electrical activity unrelated to the signal of interest while passing the signal of interest. - View Dependent Claims (46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73)
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74. A system for sensing electrical activity in tissue of a user, comprising:
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means for detecting electrical activity from the tissue of the user at a first point on the skin of the user relative to a second point which is in a spaced apart relationship to the first point and generating a voltage signal in response thereto which contains a signal of interest and undesired signals;
means for amplifying the voltage signal to amplify the signal of interest and the undesired signals without substantially amplifying the noise, the amplification resulting in an output signal.
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75. A system for sensing electrical activity in tissue of a user, comprising:
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an arrangement which detects electrical activity from the tissue of the user at a first point on the skin of the user relative to a second point which is in a spaced apart relationship to the first point and generating a voltage signal in response thereto which contains a signal of interest and undesired signals;
an arrangement which amplifies the voltage signal to amplify the signal of interest and the undesired signals without substantially amplifying the noise, the amplification resulting in an output signal.
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Specification