Table 1.
Performance comparison between the proposed filter and other fifth-order low-pass filters for ECG signal acquisition.
| Symbol | This Work | MEJ (2019) [10] | IEEE TBioCAS (2019) [9] | IEEE TCAS-II (2018) [8] | IEEE TBioCAS (2009) [7] |
|---|---|---|---|---|---|
| VDD [V] | 0.5 | 0.25 | 1 | 1 | 1 |
| Tech [um] | 0.18 | 0.13 | 0.18 | 0.18 | 0.18 |
| VTH [V] | 0.5 | 0.44 | 0.5 | 0.5 | 0.5 |
| Order (N) | 5 | 5 | 5 | 5 | 5 |
| No. of active device | 5 MIGD-OTAs | 6 FDDTAs | 6 OTAs | 6 OTAs | 11 OTAs |
| Structure | Gm-C fully-diff. | Gm-C fully-diff. | Gm-C fully-diff. | Gm-C fully-diff. | Gm-C fully-diff. |
| BW [Hz] | 250 | 100 | 250 | 250 | 250 |
| IRN [µVrms] | 167 | 4.7 | 134 | 100 | 300 |
| DR [dB] | 63.24 | 57.00 | 61.2 | 49.9 | 50 |
| Power (P) [nW] | 34.65 | 603 | 41 | 350 | 453 |
| FOM = P/(N * BW * DR) [pJ] | 0.0191 | 1.7 | 0.0286 | 0.896 | 1.15 |
| LV capability = VTH/VDD * 100 [%] | 100 | 176 | 50 | 50 | 50 |
| Area [mm2] | 0.08 (estim.) (off-chip cap.) |
0.67 (off-chip cap.) |
0.24 | 0.12 | 0.13 |
| Obtained results | Simulation | Measured | Measured | Measured | Measured |