A System for Indicating Changes in the Resistance of a Living Body, Used therein Circuit of Feedback and Control Used therein and Method for Preservation of Constant Amplitude Characteristics

摘要

1. Technical Result Increase in sensitiveness and preciseness of measuring. 2. Essence A system comprises connected with one another a resistance measuring circuit having outputs, an amplifier circuit, an indicator circuit and a sensitivity regulating circuit. By means of the resistance measuring circuit is conducted the measuring in parallel to a living body in the scope of the first range of comparatively low variable resistances and in the scope of the second range comparatively high resistances and formation of measured signal. By means of the amplifier circuit the measured signal is amplified to the sensed level. The indicator circuit forms the measured signal in the perceptive form. The sensitivity regulating circuit automatically increases the sensitivity of the indicator circuit measured by the resistance measuring circuit for formation of high resistance in the second range. 3. Field of Application Medical equipment. Figures: 23