SYSTEM FOR MEASURING AND INDICATING CHANGE IN RESISTANCE OF LIVING BODY

摘要

PROBLEM TO BE SOLVED: To provide a system for measuring resistance of a living body by including an active calibration circuit for correctly indicating a small change of resistance of the living body, eliminating undesirable properties in a signal representing the resistance of the living body, and providing response of an almost constant amplitude to a desired measured input so as to maintain the device sensitivity at a specified level.

SOLUTION: The system for measuring the change of the resistance in the living body includes a resistance measuring circuit 20, an amplifying circuit 30, and a display circuit 24. The amplifying circuit 30 includes a calibration circuit 50 to provide an almost constant amplitude response to a specific measured input.

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