US 12,440,143 B2
Signal acquisition circuit and physiological detection apparatus
Bao Fu, Beijing (CN)
Assigned to Beijing BOE Technology Development Co., Ltd., Beijing (CN)
Appl. No. 17/772,253
Filed by BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
PCT Filed Jun. 17, 2021, PCT No. PCT/CN2021/100598
§ 371(c)(1), (2) Date Apr. 27, 2022,
PCT Pub. No. WO2022/022145, PCT Pub. Date Feb. 3, 2022.
Claims priority of application No. 202010754068.4 (CN), filed on Jul. 30, 2020.
Prior Publication US 2022/0369987 A1, Nov. 24, 2022
Int. Cl. A61B 5/308 (2021.01); A61B 5/00 (2006.01); A61B 5/0205 (2006.01); A61B 5/282 (2021.01); A61B 5/08 (2006.01); A61B 5/318 (2021.01)
CPC A61B 5/308 (2021.01) [A61B 5/0205 (2013.01); A61B 5/282 (2021.01); A61B 5/7203 (2013.01); A61B 5/08 (2013.01); A61B 5/318 (2021.01)] 13 Claims
OG exemplary drawing
 
1. A signal acquisition circuit, comprising: at least one signal acquisition electrode, wherein each of the at least one signal acquisition electrode is provided with at least one signal acquisition branch circuit corresponding to the signal acquisition electrode, and each of at least part of the at least one signal acquisition electrodes is provided with a feedback network branch circuit;
a first terminal of each of the at least one signal acquisition branch circuit is electrically connected to a corresponding signal acquisition electrode, a second terminal of each of the at least one signal acquisition branch circuit is electrically connected to a corresponding signal input terminal of a signal processing module, and each of the at least one signal acquisition branch circuit is configured to transmit a bioelectrical signal acquired by the corresponding signal acquisition electrode for physiological detection to the signal processing module; and
a first terminal of the feedback network branch circuit is electrically connected to the corresponding signal acquisition electrode, a second terminal of the feedback network branch circuit is electrically connected to a Driven-Right-Leg Circuit, and the feedback network branch circuit is configured to transmit a common mode interference signal acquired by the corresponding signal acquisition electrode to the Driven-Right-Leg Circuit such that the Driven-Right-Leg Circuit performs a backward process on the common mode interference signal to generate an anti-interference signal, and the feedback network branch circuit is configured to transmit the anti-interference signal output by the Driven-Right-Leg Circuit to the corresponding signal acquisition electrode,
wherein the at least one signal acquisition electrode comprises two signal acquisition electrodes, and only one of the two signal acquisition electrodes is provided with the feedback network branch circuit.