Surgery – Truss – Pad
Patent
1989-04-20
1992-05-19
McGraw, Vincent P.
Surgery
Truss
Pad
356 41, A61B 500
Patent
active
051138611
ABSTRACT:
A method is used for processing signals, particularly for oximetric measurements on living human tissue. Spurious signals are suppressed with respect to information signals. The spurious signals have a frequency lying in a first frequency range, and the information signals have a frequency lying in a second frequency range being different from said first frequency range. The signals are conducted over a filter having essentially a blocking characteristic in said first frequency range and having essentially a transmission characteristic in said second frequency range. An output signal of the filter is further processed.
In order to eliminate distorting effects from the filter on the information signal, a first function is determined representing the deviation of the frequency response of the filter in said frequency range from an ideal transmission characteristic. A second function inverted with respect to said first function is generated. The output signal is weighted by the second function to generate a weighted output signal.
REFERENCES:
patent: 3987293 (1976-10-01), Crooke
patent: 4714080 (1987-12-01), Edgar, Jr. et al.
patent: 4811097 (1989-05-01), Ritter et al.
Proceedings of the IEEE vol. 64, no. 8, Aug. 1976, New York, USA, pp. 1151-1162.
Hewlett--Packard Company
Keesee LaCharles P.
McGraw Vincent P.
Schuette Richard F.
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