US 12,295,710 B2
Device and method for human body impedance analysis insensitive to high contact impedance and parasitic effects
Artem Yurievich Nikishov, Moscow (RU); Konstantin Alexandrovich Pavlov, Moscow (RU); and Namseok Chang, Suwon-si (KR)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Sep. 8, 2022, as Appl. No. 17/940,655.
Application 17/940,655 is a continuation of application No. PCT/KR2022/008590, filed on Jun. 17, 2022.
Claims priority of application No. 2021117779 (RU), filed on Jun. 18, 2021.
Prior Publication US 2023/0016653 A1, Jan. 19, 2023
Int. Cl. A61B 5/053 (2021.01); A61B 5/00 (2006.01); A61B 5/0537 (2021.01)
CPC A61B 5/053 (2013.01) [A61B 5/0537 (2013.01); A61B 5/681 (2013.01); A61B 5/7225 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A device for determining bioimpedance, the device comprising:
first and third contact electrodes, configured to contact a first part of a user's body;
second and fourth contact electrodes configured to contact a second part of the user's body, the first part being different from the second part;
an alternating current source;
a current measurement circuit, wherein the alternating current source and the current measurement circuit have a common ground;
at least one voltage measurement circuit configured to measure a voltage between one of the first and third contact electrodes and the common ground, and between one of the second and fourth contact electrodes and the common ground;
a first switch comprising four ports, a first port being connected to the alternating current source, a second port being connected to the current measurement circuit, the first switch having at least two states and configured to form, in a first state and a second state, respectively, first and second current measuring paths so that a current flows through the user's body from the first part of the user's body to the second part of the user's body; and
a control unit connected to the first switch, to the current measurement circuit and to the at least one voltage measurement circuit, and configured to:
control the states of the first switch,
receive current and voltage values measured by the current measurement circuit and the at least one voltage measurement circuit for each current measurement path, and
determine a bioimpedance of the user based on the received current and voltage values.