64 channel acquisition system for recording biomedical signals

This paper presents the design and preliminary measurements of the 64 channel electronic chip for neurobiology experiments. Chip is designed in the 180nm technology and operates with ±0.9 V supply voltage. Preliminary measurements show the low and the high cut off frequencies may be tuned in 9 – 90 Hz and in the 1.6 – 24 kHz range respectively while the gain of the amplifier may be set either to 700 V/V or 350 V/V. To decrease the number of wires and make designed chip convenient for the experiments it is equipped with the analogue multiplexer. The single channel consumes 200 µW of power and this together with other parameters make the chip suitable for recording neurobiology signals.