公开(公告)号：US20160324477A1

公开(公告)日：2016-11-10

申请号：US15147720

申请日：2016-05-05

Applicant: Texas Instruments Incorporated

Inventor： Sarma Sundareswara GUNTURI ,  Sunil CHOMAL

IPC: A61B5/00 ,  A61B5/024

CPC classification number: A61B5/721 ,  A61B5/02416 ,  A61B5/725 ,  A61B5/7257 ,  A61B5/7278 ,  A61B2562/0219

Abstract: The disclosure provides a heart rate monitor (HRM) circuit. The HRM circuit includes an analog front end (AFE). The AFE receives a Photoplethysmographic (PPG) signal, and generates a fine PPG signal. A motion cancellation circuit is coupled to the AFE, and receives the fine PPG signal and an accelerometer signal. The motion cancellation circuit subtracts the accelerometer signal from the fine PPG signal to generate a coarse heart rate. A peak detector is coupled to the motion cancellation circuit and the AFE, and generates an instantaneous heart rate. A filter is coupled to the peak detector, and generates an estimated heart rate from the instantaneous heart rate, the estimated heart rate is provided as a feedback to the peak detector.

Abstract translation: 本公开提供了心率监测器（HRM）电路。 HRM电路包括模拟前端（AFE）。 AFE接收到Photoplethysmographic（PPG）信号，并产生一个精细的PPG信号。 运动消除电路耦合到AFE，并且接收精细的PPG信号和加速度计信号。 运动消除电路从精细PPG信号中减去加速度计信号，以产生粗心率。 峰值检测器耦合到运动消除电路和AFE，并产生瞬时心率。 滤波器耦合到峰值检测器，并且从瞬时心率产生估计的心率，将估计的心率作为反馈提供给峰值检测器。