Fig. 3

Block diagram showing the overall architecture of the proposed instrument. The data received by the receiver module can either be directed i) to a personal computer (PC) through universal serial bus (USB) 2.0 interface, or ii) to a commercially available data acquisition system (e.g. Powerlab) that digitizes and depicts the data on a PC. Path (ii) ensures that the proposed instrument can functionally integrate with existing medical biosignal acquisition systems, if required