Bioelectrical impedance measuring apparatus constructed by one-chip integrated circuit

A bioelectrical impedance measuring apparatus for measuring a bioelectrical impedance of a test subject based on the bioelectrical impedance method, comprising:

• an input device which inputs a personal body data of the test subject;
• at least a pair of current supply electrodes for applying a current into a living body,
• at least a pair of voltage measuring electrodes for measuring a voltage of the living body,
• a display unit for indicating a result of measurement, and
• a one-chip microcomputer including an alternating current signal generating device, an amplifier, an analog-to-digital converter, a control and processing device, a storage unit, an output terminal and an oscillator, wherein:
• said alternating current signal generating device generates an alternating current signal to be applied to a living body through said current supply electrodes;
• said amplifier amplifies a measured alternating voltage signal;
• said analog-to-digital converter converts an analog value representative of said amplified alternating voltage signal to a digital value;
• said control and processing device estimates a factor relating to a body constitution of the test subject based on the inputted personal body data and a measured bioelectrical impedance value, and controls each device;
• said storage unit stores the inputted personal body data, the estimated factor concerning the body constitution of the test subject, or the like;
• said output terminal outputs a signal for indicating a set of estimated data concerning the body constitution;
• and
• said oscillator generates a clock signal to actuate the control and processing device.