Apparatus and method for reducing interference
First Claim
Patent Images
1. An electronic apparatus for reducing interference in a desired signal, the apparatus comprising (a) a signal line connected to a signal electrode;
- and (b) a reference line connected to a reference electrode;
said signal line and reference line being associated by being in close physical proximity for a substantial part of their lengths, said electronic apparatus further comprising subtraction means for subtracting an interference signal on the reference line from an interference signal on the signal line thereby to enhance a desired signal on the-signal line.
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Abstract
In an electronic apparatus and method for reducing interference in an EPM signal, there is provided (a) a signal line connected to a-signal electrode; and (b) a reference line connected to a reference electrode. The signal line and reference line are associated by being in close physical proximity for a substantial part of their lengths. Subtraction means subtracts an interference signal on the reference line from an interference signal on the signal line to enhance a desired signal on the signal line.
40 Citations
41 Claims
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1. An electronic apparatus for reducing interference in a desired signal, the apparatus comprising
(a) a signal line connected to a signal electrode; - and
(b) a reference line connected to a reference electrode;
said signal line and reference line being associated by being in close physical proximity for a substantial part of their lengths, said electronic apparatus further comprising subtraction means for subtracting an interference signal on the reference line from an interference signal on the signal line thereby to enhance a desired signal on the-signal line. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A combined fMRI and EPM apparatus comprising an MRI unit and an EPM system which comprises an electronic apparatus for reducing interference in a desired signal, the apparatus comprising
(a) a signal line connected to a signal electrode; - and
(b) a reference line connected to a reference electrode;
said signal line and reference line being associated by being in close physical proximity for a substantial part of their lengths, said electronic apparatus further comprising subtraction means for subtracting an interference signal on the reference line from an interference signal on the signal line thereby to enhance a desired signal on the signal line. - View Dependent Claims (14)
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15. A method of reducing interference from a designed signal, the method comprising
(a) providing a signal line carrying a desired signal and an interference signal; -
(b) providing a reference line carrying at least an interference signal, said signal line and reference line being associated by being in close physical proximity for a substantial part of their lengths; and
(c) a subtraction step of subtracting the interference signal on the reference line from the interference signal on the signal line. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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23. A method of performing a simultaneous fMRI and EPM, the method comprising placing a subject in an MRI apparatus and performing MRI scans and simultaneously taking EPM measurements by a method which comprises reducing interference from a designed signal by steps comprising
(a) providing a signal line carrying a desired signal and an interference signal; -
(b) providing a reference line carrying at least an interference signal, said signal line and reference line being associated by being in close physical proximity for a substantial part of their lengths; and
(c) a subtraction step of subtracting the interference signal on the reference line from the interference signal on the signal line.
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24. An electronic apparatus for reducing interference in a signal derived from an EPM, the apparatus comprising
(a) a signal line connected to a signal electrode; -
(b) a reference line connected to a reference electrode; and
(c) at least one ground line for said signal line and reference line, said ground line or lines being connected to a ground electrode or individually to respective ground electrodes;
said electronic apparatus further comprising subtraction means for subtracting an interference signal on the reference line from a signal on the signal line. - View Dependent Claims (25, 26, 27)
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28. A method of reducing interference on a signal derived from an EPM, the method comprising
(a) providing a signal line carrying a desired signal and a first interference signal, said signal line being connected to a signal electrode; -
(b) providing a reference line carrying at least a second interference signal, said reference line being connected to a reference electrode;
(c) providing at least one ground line for said signal line and reference line, said ground line or lines being connected to at least one ground electrode or individually to respective ground electrodes; and
(d) a subtraction step of subtracting the second interference signal on the reference line from the first interference signal on the signal line. - View Dependent Claims (29, 30, 31, 33)
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- 32. An electrode support structure apparatus for effecting an EPM, the apparatus comprising an electrode support having supported thereon, an array of signal electrodes presented for contacting the skin of a subject, first connection means being provided for independent electrical connection to each of said signal electrodes, the apparatus further comprising an electrically insulated mesh having one or more of reference nodes and second connection means for independent electrical connection to the or each of said reference nodes.
Specification