Table 1. Performance comparison of different filters and interpolation methods utilized in the proposed ECG baseline removal circuitry.

Filter +Interpolation	Power (μW)	Core Area^* (mm²)	SNR improvement (dB)
1^st order HPF + Quadratic	16.82	3.04 × 4.12	8.96
2^nd order HPF + Quadratic	17.4	3.17 × 4.29	9.21
3^rd order HPF + Quadratic	18.56	3.32 × 4.49	9.15
4^th order HPF + Quadratic	19.14	3.38 × 4.58	9.96
4^th order HPF + Linear	15.66	2.76 × 3.75	9.54
4^th order LPF + No Interpol.	6.38	1.17 × 1.59	7.58

Estimated chip area