Multi-electrode cuffs have been proposed as a means for the parallel recording of naturally-occurring neural signals. Compared to a conventional tripole cuff providing a single channel signal, additional information about the velocity and direction of nerve signals can be extracted from the multi-electrode recordings. Moreover, interference suppression is improved and overall power consumption reduced, as the analysis shows. In this paper a new recording system is proposed, each channel of which consists of a low-noise preamplifier employing lateral bipolar transistors to provide an impedance match to the tissue and a path to ground for the switching currents of a single high-gain amplifier, which is multiplexed between the channels. The proposed system provides low-noise, low-power operation and practically identical channel gains and is suitable for integration in a larger CMOS-based system.
|Number of pages||12|
|Journal||Analog Integrated Circuits and Signal Processing|
|Publication status||Published - Aug 2011|
|Event||15th IEEE International Conference on Electronics, Circuits and Systems Location - Westin Dragonara Resort, St. Julian's, Malta|
Duration: 31 Aug 2008 → 3 Sep 2008