... external electronic equipments, such as switch-ing mode power supplies, on the acquisition system.Then, the signal filtering and amplification subsystem isconnected to the A/D conversion subsystem. ... firstone is responsible for acquiring the signal and for condi-tioning it (by filtering and amplifying it). Following, theanalog signal just acquired is converted to a digital one(A/D converter), ... thestudied ones. After such feature extraction, the system hasinformation enough to make decisions (classify) and gen-erate the necessary control actions to be delivered to theelectronic device...