TABLE IV.
Comparison of this work with the state-of-the-art
| Parameter | This Work | [37] | [10] | [18] | [28] | [38] | [27] | [14] | [13] |
|---|---|---|---|---|---|---|---|---|---|
| Year | 2016 | 2015 | 2015 | 2014 | 2014 | 2013 | 2013 | 2012 | 2007 |
| Technology | 0.18 μm | 0.18 μm HV |
0.5 μm HV |
65 nm | 0.35 μm HV |
0.18 μm HV |
65 nm | 0.35 μm HV |
0.7 μm HV |
| Supply Voltage (V) | 3.3 | 18 | 12 | 3 | 15 | 12 | ±2.5 | 20 | +6/−9 |
| Number of Channels | 8 | 1 | 16 | 256 | 2 | 8 | 512 | 2 | 1 |
| Max Istim (mA) | 0.25 | 1.05 | 1.45 | 0.465 | 1 | 0.504 | 0.05 | 1 | 1 |
| Resolution (ENOB) | 8 (7.4) | 7 (-) | 9 (8) | 5 (4.3) | 5 (4.6) | 6 (-) | 5 (-) | 5 (-) | 7 (-) |
| Charge balance architecture | biphasic + calibration | H-bridge | current mirror | dynamic current mirror | dynamic current mirror | asymmetric H-bridge | biphasic + calibration | pulse insertion, offset regulation | dynamic current mirror |
| Matching (%) | 0.3 | <0.01 | 3.6 ±2.5 | 0.5 | 0.1 | 0.05 | 2.24 | N.A. | 0.4 |
| Stimulation Modes | multipolar | monopolar, bipolar | multipolar | multipolar | monopolar | bipolar | monopolar | monopolar | monopolar |