US 12,011,272 B2
Process of capturing a biopotential signal at a surface of a body and apparatus therefor
Andrew Lowe, Auckland (NZ); Anubha Kalra, Auckland (NZ); Gautam Anand, Auckland (NZ); and Raymond Simpkin, Auckland (NZ)
Appl. No. 17/609,939
Filed by AUCKLAND UNIVERSITY OF TECHNOLOGY (AUT), Auckland (NZ)
PCT Filed May 11, 2020, PCT No. PCT/NZ2020/050049
§ 371(c)(1), (2) Date Nov. 9, 2021,
PCT Pub. No. WO2020/226515, PCT Pub. Date Nov. 12, 2020.
Claims priority of application No. 2019901584 (AU), filed on May 9, 2019.
Prior Publication US 2022/0202336 A1, Jun. 30, 2022
Int. Cl. A61B 5/302 (2021.01); A61B 5/00 (2006.01); A61B 5/053 (2021.01); A61B 5/308 (2021.01); A61B 5/327 (2021.01); G01R 27/02 (2006.01); G06F 17/16 (2006.01); A61B 5/277 (2021.01)
CPC A61B 5/302 (2021.01) [A61B 5/053 (2013.01); A61B 5/308 (2021.01); A61B 5/327 (2021.01); A61B 5/6813 (2013.01); G01R 27/02 (2013.01); G06F 17/16 (2013.01); A61B 5/277 (2021.01)] 22 Claims
OG exemplary drawing
 
1. An apparatus operable to reconstruct a biopotential signal from a signal received at a surface of a body, the apparatus comprising:
a sensor device which forms a first signal connection for the biopotential signal, the first signal connection having a first sensor impedance, and which forms a second signal connection for the biopotential signal, the second signal connection having a second sensor impedance, wherein the sensor device is arranged such that the second sensor impedance is linearly related to the first sensor impedance by an impedance relation;
sensor circuitry which provides i) a first sensor signal related to the biopotential signal by a first channel expression which is dependent on parameter values for the sensing circuitry providing the first sensor signal, dependent on the first sensor impedance and dependent on the biopotential signal, and ii) a second sensor signal related to the biopotential signal by a second channel expression which is dependent on parameter values for the sensing circuitry, dependent on the second sensor impedance and dependent on the biopotential signal;
a processor operable to read data carrying information on parameter values of the receiver circuitry, operable to read data carrying information on the first sensor signal, operable to read data carrying information on the second sensor signal and operable to generate data carrying information on a reconstruction of the biopotential signal said reconstruction using a derived biopotential relation which is derived from a set of relations comprising the first channel expression, the second channel expression and the impedance relation, wherein the derived biopotential relation used to reconstruct the biopotential signal is independent of the first sensor impedance.