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Automatic rezeroing of drifting physiologic signals

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Abstract

An electronic circuit is described which automatically rezeroes a physiologic signal whenever it reaches the limit of a display. This modified signal can be used for polygraph monitoring while the raw signal is processed by a wide-range high-resolution a.d. convertor. The device is currently used in conjunction with the barometric method for measuring tidal volume, but should find general use in plethysmography.

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Epstein, R.A., Epstein, M.A.F. Automatic rezeroing of drifting physiologic signals. Med. Biol. Eng. Comput. 18, 746–748 (1980). https://doi.org/10.1007/BF02441900

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  • DOI: https://doi.org/10.1007/BF02441900

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