Surgery – Truss – Pad
Patent
1979-02-15
1981-01-20
Kamm, William E.
Surgery
Truss
Pad
128709, 128908, A61B 504
Patent
active
042456509
ABSTRACT:
In an exemplary embodiment a multiplexer unit is arranged in the first device unit in the input channels for electric physiological signals and a demultiplexer unit is arranged in the second device unit on the side of the output channels for the time-shared scanning of the signals in the input or, respectively, output channel; and a pulse amplitude modulator and a single galvanically separating coupling location are inserted in series between the multiplexer unit of the first device unit and the demultiplexer unit of the second device unit at the interface between both device units for the de-coupled signal transmission in the time multiplex mode. By this arrangement the minimized number of coupling locations holds coupling capacitance and leakage current to a minimum with only a modest outlay for appertaining control circuitry.
REFERENCES:
patent: 3690313 (1972-09-01), Weppner et al.
patent: 3815109 (1974-06-01), Carraway et al.
patent: 3910257 (1975-10-01), Fletcher et al.
Analog Devices, "Medical and Industrial Isolation Amps", no date, pp. 54-59.
Skutt et al., "IEEE Transactions on Biomedical Engineering", vol. 17, No. 4, Oct. 1970, pp. 339-348.
Welker Manfred
Wolf Herbert
Kamm William E.
Siemens Aktiengesellschaft
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