Biopotential Signal Acquisition System and Method
First Claim
1. A biopotential signal acquisition system, comprising:
- a first active electrode including an integrated pre-amplifier and an analogue to digital converter;
a second active electrode including an integrated pre-amplifier and an analogue to digital converter, wherein the second active electrode has a variable gain;
a test signal generator configured to generate a test signal at a test frequency and to couple the test signal to the first and/or second active electrodes; and
a digital signal processor configured to process the digital outputs of the first and second active electrodes to derive a gain control signal based on a difference between the first and second active electrode outputs at the test frequency, and to apply the gain control signal to the second active electrode.
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Abstract
A biopotential signal acquisition system, comprising: a first active electrode including an integrated pre-amplifier and an analogue to digital converter; a second active electrode including an integrated pre-amplifier and an analogue to digital converter, wherein the second active electrode has variable gain; a test signal generator for generating a test signal at a test frequency and coupling the test signal to the first and/or second active electrodes; and a digital signal processor configured to: process the digital outputs of the first and second active electrodes to derive a gain control signal based on a difference between the first and second active electrode outputs at the test frequency, and apply the gain control signal to the second active electrode. The disclosure also relates to an electronic circuit or device and a biopotential signal acquisition method.
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Citations
16 Claims
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1. A biopotential signal acquisition system, comprising:
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a first active electrode including an integrated pre-amplifier and an analogue to digital converter; a second active electrode including an integrated pre-amplifier and an analogue to digital converter, wherein the second active electrode has a variable gain; a test signal generator configured to generate a test signal at a test frequency and to couple the test signal to the first and/or second active electrodes; and a digital signal processor configured to process the digital outputs of the first and second active electrodes to derive a gain control signal based on a difference between the first and second active electrode outputs at the test frequency, and to apply the gain control signal to the second active electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A biopotential signal acquisition method, comprising:
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capturing a first biopotential signal using a first active electrode comprising an integrated pre-amplifier and an analogue to digital converter; capturing a second biopotential signal using a second active electrode comprising an integrated pre-amplifier and an analogue to digital converter, wherein the second active electrode has a variable gain; generating a test signal at a test frequency and coupling the test signal to the first and/or second active electrodes; and processing the digital outputs of the first and second active electrodes to derive a gain control signal based on a difference between the first and second active electrode outputs at the test frequency, and applying the gain control signal to the second active electrode. - View Dependent Claims (13, 14, 15, 16)
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Specification