A convenient, low cost, heart rate monitor. In one embodiment, a digital filter structure (64) includes a low pass filter having a notch at 60 Hz and a bandpass filter which amplifies signals in a frequency range from 10 Hz to 40 Hz and has a notch at 60 Hz. This digital filter has a recursive structure and uses integer coefficients to simplify and speed up the calculations. A four bit microcontroller (70) may implement the digital filter. The output of the digital filter is subject to enhancement signal processing to emphasize QRS complexes indicative of human heartbeats.
申请公布号
WO9717015(A1)
申请公布日期
1997.05.15
申请号
WO1996US18349
申请日期
1996.11.07
申请人
SALUTRON, INC.;LO, THOMAS, YING-CHING;TSAI, YUH, SHOW