Stability and Phase Response Analysis of Optimum Reduced-Order IIR Filter Designs for ECG R-Peak Detection

Figure 10

The stability of three different filter designs was investigated using pole-zero graphs. (a) For the Pan–Tomkins LPF filter. (b) For the 60-order FIR filter. (c) With optimum reduced-order IIR filter.

(a)

(b)

(c)