System for measuring and indicating changes in the resistance of a living body

摘要

A device for indicating changes in resistance of a living body is disclosed. The method comprises: (a) a resistance measuring circuit having external leads for sensing the resistance of a living body placed across the external leads; (b) amplifier means for producing an analog measurement signal indicative of the sensed body resistance; (c) a digital processing unit for digitizing and digitally processing the measurement signal to substantially offset the effects of component aging, tolerances and temperature on the accuracy of the measurement signal; and (d) indicator means responsive to the processed measurement signal for displaying visually perceivable indicia representative of small sensed body resistance changes.