Method of, and apparatus for, measuring electrogastrogram and intestinal electrogram
AssigneesGram Corporation, Nissho Corporation
InventorsFumitaka Asano, Yoshio Yamada
Life of this patent
Estimating the term…
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.
Claims7
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.
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.
Dependencies are inferred from the claim text.