An 8-channel neural recording system with programmable gain and bandwidth

Abstract

In this paper we present the design and implementation of an 8-channel programmable neural recording system that can be used to study and record electrophysiological data of freely behaving animals. Each neural amplifier has two programmable gains in two programmable bandwidths. The bandwidths are programmable between 0.1-300Hz, suitable to measure local field potentials and 0.3-4kHz, suitable for measuring action potentials. The programmable gains are 54dB, 66dB in the lower bandwidth region and 80dB, 86dB in the higher bandwidth region. A chip has been designed and implemented using a 0.5μm technology working at 3.3V