Socionext Inc.

Ryusuke Kurachi

Masaya Tamamura

Mari Kobayashi

Amane Inoue

Kazuyuki Kanazashi

Masato Yoshioka

Hiroyuki Tomura

Minoru Nakagawara

A pulse signal generator circuit generates first and second pulse signals for electrodes placed on the chest of a subject with phases that differ by 180&#xb0;. A rectifier circuit receives a potential difference signal, which reflects an impedance between the electrodes that changes according to respiratory motion and in which timing of changes caused by changes in the first pulse signal or the second pulse signal is delayed from the timing of the changes in the first pulse signal and the second pulse signal, and outputs a rectified signal produced by rectifying the potential difference signal. A control signal generator circuit causes the rectifier circuit to invert the potential difference signal, which becomes a negative voltage value from the certain timing, to a positive voltage value from the certain timing. An AD converter circuit outputs a digital value based on the magnitude of the rectified signal.

Semiconductor integrated circuit and respiratory motion testing apparatus

The purpose of the present invention is to reduce the influence of pump ripple and to achieve fast control of cuff pressure with a general purpose magnetic valve when continuously measuring blood pressure. A blood pressure meterincludes a pump, a cuffto be mounted on the site of blood pressure measurement of a subject, a first valve, a first pressure sensor, a detection sensor, a second valve, and a second pressure sensor. The blood pressure meteralso includes a valve opening adjustment unitand a blood pressure measurement unit. The first valveadjusts discharge volume of the pumpand the second valveadjusts cuff pressure inside the cuff. The first pressure sensordetects the discharge pressure of the pump, the second pressure sensordetects the cuff pressure, and the detection sensordetects the amount of light associated with the volume of the artery at the site of blood pressure measurement of the subject. The valve opening adjustment unitacquires the discharge pressure, the cuff pressure, and the amount of light, and adjusts the openings of the first valveand the second valve. The blood pressure measurement unitmeasures the blood pressure of the subject on the basis of the cuff pressure.

Blood pressure meter

Body composition measuring apparatus

Electrode for electrocardiogram measurement

Growing community of inventors

Yokohama, Japan

Ryusuke Kurachi