US 11,653,850 B2
Apparatus and method of measuring bio signal
Myounghoon Jung, Bucheon-si (KR); Kak Namkoong, Seoul (KR); Youngjun Koh, Yongin-si (KR); Jungmok Bae, Seoul (KR); Yeolho Lee, Anyang-si (KR); and Hyeongseok Jang, Daejeon (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Dec. 31, 2018, as Appl. No. 16/237,310.
Application 16/237,310 is a division of application No. 15/266,410, filed on Sep. 15, 2016, granted, now 10,285,620.
Claims priority of application No. 10-2015-0141040 (KR), filed on Oct. 7, 2015.
Prior Publication US 2019/0133487 A1, May 9, 2019
Int. Cl. A61B 5/053 (2021.01); A61B 5/0537 (2021.01); A61B 5/00 (2006.01); A61B 5/0205 (2006.01); A61B 5/024 (2006.01); A61B 5/026 (2006.01); A61B 5/08 (2006.01)
CPC A61B 5/0537 (2013.01) [A61B 5/0205 (2013.01); A61B 5/026 (2013.01); A61B 5/02405 (2013.01); A61B 5/02438 (2013.01); A61B 5/0809 (2013.01); A61B 5/4519 (2013.01); A61B 5/4872 (2013.01); A61B 5/681 (2013.01); A61B 5/6826 (2013.01); A61B 5/7203 (2013.01); A61B 5/6824 (2013.01); A61B 2560/0223 (2013.01); A61B 2560/0468 (2013.01); A61B 2562/04 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A method of measuring a bio signal using a bio signal measuring apparatus, an impedance measuring circuit of the bio signal measuring apparatus comprising a voltmeter, a current source, a plurality of electrodes comprising a pair of a first current electrode and a second current electrode to which the current source applies current, a pair of a first voltage electrode; and a second voltage electrode from which the voltmeter detects a voltage between the first voltage electrode and the second voltage electrode, a first switch disposed between the first current electrode and the first voltage electrode, and a second switch disposed between the second current electrode and the second voltage electrode, the method comprising:
positioning the plurality of electrodes to contact a surface of an examinee;
measuring a first impedance value of the examinee while operating the impedance measuring circuit according to a first mode in which the first switch and the second switch are in an open state;
measuring a second impedance value of the examinee while operating the impedance measuring circuit according to a second mode in which the first switch and the second switch are in a closed state; and
obtaining bio impedance of the examinee by directly using the first impedance value, the second impedance value, an internal impedance value of the current source, and an input impedance value of the impedance measuring circuit as data for obtaining the bio impedance,
wherein, in the second mode, an internal impedance of the current source, an input impedance of the impedance measuring circuit, the current source and the voltmeter are parallel-connected to each other, one end of each of the internal impedance of the current source, the input impedance of the impedance measuring circuit, the current source and the voltmeter is electrically connected to both the first current electrode and the first voltage electrode connected in parallel, and the other end of each of the internal impedance of the current source, the input impedance of the impedance measuring circuit, the electrically current source and the voltmeter is connected to both the second current electrode and the second voltage electrode connected in parallel.