Anti Aliasing Filter

Since we intend to sample the signal at a frequency of 200 Hz, the bandwidth of the signal needs to be limited at 100 Hz. To do so, on the production board, we will use two second-order active lowpass filters to get a fourth-order filter with a cut-off frequency of 100 Hz, as shown on figure 9.

Figure 8: Low-Pass Filter Schematic

Figure 9: Low-Pass Filter Response