Surgery – Truss – Perineal
Patent
1975-06-19
1977-05-17
Kamm, William E.
Surgery
Truss
Perineal
A61B 504
Patent
active
040235653
ABSTRACT:
A circuit arrangement for the processing of physiological measuring signals, in which there is provided a plurality of input amplifiers each having a positive and a negative input, whose output signals control a signal reproducing arrangement, and which are each connected to a collector electrode. Connected to the positive inputs of the input amplifier are the collector electrodes for the signals, and that resistors are located between the negative inputs and the outputs of the input amplifiers, the negative inputs being connected across resistors with a common potential junction, and that the two inputs of a differential amplifier are connected to the outputs of respectively two input amplifiers, the output signal of the differential amplifier controlling the signal reproducing arrangement, and in which the common potential junction is connected to the collector electrode.
REFERENCES:
patent: 3709212 (1973-01-01), Koeblitz
patent: 3811428 (1974-05-01), Van Horn et al.
Huntsman et al., "IEEE Transactions on Bio-Medical Engineering" vol. 18, No. 4, July, 1971 pp. 301-302.
Duffin, Jr., et al., "Proceedings of the 23rd Annual Conference on Engineering In Medicine & Biology", Washington D.C. Nov. 16-19, 1970 p. 193.
Kamm William E.
Siemens Aktiengesellschaft
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