Surgery – Truss – Pad
Patent
1993-12-01
1995-06-27
Kamm, William E.
Surgery
Truss
Pad
128902, A61B 50428
Patent
active
054271118
ABSTRACT:
A receiver or preamplifier for differential signals, in particular electrocardiogram signals, includes n electrodes to provide at least one signal at an acceptable common mode rejection ratio, even if the subject to which the electrodes are applied has a different ground potential than the assigned monitor. This is achieved by two current sources which are controlled by a sum signal representing a sum of the electrode signals, said current sources injecting a corresponding current into the electrodes.
REFERENCES:
patent: 3587562 (1971-06-01), Williams
patent: 4164215 (1979-08-01), Finlayson et al.
patent: 4243044 (1981-01-01), Blancke
patent: 5002063 (1991-03-01), Haner
"High-Quality Recording of Bioelectric Events, Part 2 Low-noise, low-power multichannel amplifier Design", Medical & Biological Engineering & Computing, vol. 29, No. 4, Jul., 91, pp. 433-439.
"Extracellular Amplifier with Bootstrapped Input Stage Results in High Common-Mode Rejection", Medical & Biological Engineering & Computing, G. Mpitsos, vol. 19, No. 5, Sep. 81, one page European Search Report for Application No. EP 93 10 4602 dated Aug. 25, 1993.
Sommer Heinz
Traub Stefan
Hewlett -Packard Company
Kamm William E.
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