Surgery – Truss – Pad
Patent
1991-02-19
1993-04-27
Kamm, William E.
Surgery
Truss
Pad
128903, A61B 50402
Patent
active
052052940
ABSTRACT:
Biomedical information is directly digitally telemetered from the patient through a frequency modulated transmitter to a remote receiver and computer station. DC offset on the biopotential leads and signals from the patient is compensated by converting the output of the amplifier, such as an electrocardiographic amplifier, into digital format, determining the average or DC component of the digital signal, and generating a digital correction word which is then converted into analog form and fed back into the input of the electrocardiographic amplifier to cancel out the DC offset. The same circuitry is used to insert a standard test signal instead of a correction signal and the output of the amplifier is then checked not to determine its DC component, but to determine whether or not the gain of the electrocardiographic amplifier is performing at a predetermined calibration point. If not, a digital correction word is generated and provided as a correction signal to the programmable gain amplifier.
REFERENCES:
patent: 3953848 (1976-04-01), Dillman et al.
patent: 3972320 (1976-08-01), Kalman
patent: 4958645 (1990-09-01), Cadell et al.
Flach Terry E.
McBride William C.
Dawes Daniel L.
Getzow Scott M.
Kamm William E.
Pacific Communications, Inc.
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