Simulation, Optimisation and Design a Platform for in-vivo Electrophysiological Signals Processing

The paper presents a hardware solution of the in vivo electrophysiological signals continuous processing and using a data vector acquisition on PC. The originality of the paper comes from some blocks proposal, which selective amplify the biosignals. One of the major problems in the electrophysiological monitoring is the difficulty to record the weak signals from deep organs that are covered by noise and the cardiac or muscular strong signals. An automatic gain control block is used, so that the high power skin signals are less amplified than the low components. The analog processing block is based on a dynamic range compressor, containing the automatic gain control block. The following block is a clipper since to capture all the transitions that escape from the dynamic range compressor. At clipper output a lowpass filter is connected since to abruptly cut the high frequencies. The data vector recording is performing by strong internal resources microcontroller including ten bits A/D conversion port. Design of analogical blocks is assisted by electronics circuit's simulation and optimization.