Apparatus and system for measuring electrical potential variations in human body
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United States of America Patent
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Feb 15, 2000
Grant Date -
N/A
app pub date -
Mar 31, 1998
filing date -
Apr 2, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus for measuring potential variations in the human body, comprising: a pair of conductors, an attachment patch for attaching the conductors to the measurement sites; an amplifier that amplifies, as AC signals, the potential variations input from the conductors through connecting wires, a transmitter that transmits the amplified signals, a battery that supplies electric power to the amplifier and transmitter, a voltage-divider circuit that divides the voltage applied from the battery, and a compensator circuit that applies a voltage so divided to the amplifier as a reference voltage and, concurrently, rejects DC components input to the conductors, using the divided voltage as a reference voltage. Hence is provided a compact apparatus for measuring body signals such as myoelectric potentials, without restricting the movements of the test subject.
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