公开(公告)号：US12113498B2

公开(公告)日：2024-10-08

申请号：US18181575

申请日：2023-03-10

Applicant: SHENZHEN SHOKZ CO., LTD.

Inventor： Xin Zhou ,  Lei Su ,  Yuxiang Zhang ,  Meiqi Li ,  Fengyun Liao ,  Xin Qi

IPC: A61B5/305 ,  A61B5/00 ,  H03H11/04

CPC classification number: H03H11/04 ,  A61B5/7225 ,  A61B5/725 ,  A61B5/305 ,  H03H2011/0488

Abstract: The embodiments of the present disclosure are for a signal processing circuit. The signal processing circuit includes an analog circuit. The analog circuit is used for processing an initial signal it receives. The initial signal includes a target signal and a noise signal. The analog circuit includes a first processing circuit and a second processing circuit. The first processing circuit is used to increase a ratio of the target signal to the noise signal, and output a first processed signal. The second processing circuit is used to amplify the first processed signal. A gain multiple of the second processing circuit to the first processed signal varies with a frequency of the first processed signal. The first processing circuit includes a common mode signal suppression circuit used to suppress a common mode signal in the initial signal, a low-pass filter circuit, and a high-pass filter circuit.