Method of, and apparatus for, measuring electrogastrogram and intestinal electrogram
First Claim
1. An apparatus for measuring an electrogastrogram and an intestinal electrogram comprising,active filter means for making a phase change with respect to a frequency linear, said filter means being able to remove frequency signals other than frequency signals contained in a potential of a bowel, said filter means being connected between an amplifier of biological signals and a recorder for recording the signals amplified by said amplifier;
- whereas said apparatus can make the relationship between a frequency of an input signal of said filter means and a phase of an output signal of said filter is linear.
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Abstract
An apparatus for measuring an electrogastrogram and an intestinal electrogram including at least an electrode fixed to a body surface, an amplifier for amplifying a potential detected by said electrode, a low-pass filter for removing frequency signals other than the potentials of the stomach and the bowel amplified by said amplifier and a recorder.
The relationship between the frequency of the input signal of said low-pass filter and the phase of the output signal is made linear.
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Citations
7 Claims
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1. An apparatus for measuring an electrogastrogram and an intestinal electrogram comprising,
active filter means for making a phase change with respect to a frequency linear, said filter means being able to remove frequency signals other than frequency signals contained in a potential of a bowel, said filter means being connected between an amplifier of biological signals and a recorder for recording the signals amplified by said amplifier; whereas said apparatus can make the relationship between a frequency of an input signal of said filter means and a phase of an output signal of said filter is linear. - View Dependent Claims (2, 3, 4)
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5. An apparatus for measuring an electrogram and an intestinal electrogram comprising,
an electrode fixed to a body surface; -
an amplifier connected to said electrode for amplifying a potential detected by said electrode; active filter means connected to said amplifier for making a phase change with respect to a frequency linear, said filter means removing frequency signals other potentials of a stomach and a bowel amplified by said amplifier; a recorder connected to said filter means; wherein said apparatus can make the relationship between a frequency of an input signal of said filter means and the phase of an output signal linear. - View Dependent Claims (6, 7)
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Specification