Czasopismo | ELEKTRONIKA - KONSTRUKCJE, TECHNOLOGIE, ZASTOSOWANIA | Rocznik 2011 - zeszyt 12

Low noise and low power multichannel integrated circuit for recording neural spikes and LFP signals

nr katalogowy: 64766

Availability of the modern submicron technologies makes it possible to build small integrated systems covering broad range of the researches. For instance, BioMEMS and ASIC technologies are used to build systems dedicated for exploring the specific areas of human nervous systems. These projects employ micromachined electrodes combined with integrated electronics in order to record or stimulate neural network activity [1, 2]. Such neurobiology experiments are led in order to answer many questions referring to the human nervous system, i.e. how it processes information, how the diseases such as Parkinson or epilepsy originates, how new medicines influence the nervous system, etc. [3, 4]. Many researches also consider employing modern integrated technologies to build system for disabled persons. These systems are called BCI’s (Brain Controlled Interface) and first positive results have been reported [5]. Many of these experiments need to record neurobiological signals, some of them involve only systems with an ability to generate stimulation pulses. Nevertheless, there are many studies which require both recording the neurobiological signals and stimulating the neural networks. Additionally, systems requiring the recording ability also need to deal with different types of neurobiological signals differing from each other with voltage amplitudes and frequency bands [6]. Thus it requires from one to build a system that will give a user ability to change the frequency band and the voltage gain according to the requirements of the experiment. Furthermore, the more signals are recorded simultaneously the better the spatial resolution of the experiment is and the better is the understanding of the observed processes. This involves using multichannel architecture of neurobiological readout systems. Thus one has to also consider the spread from channel to channel of the main parameters of such a multichannel ASIC. Based on our exp[...]

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2011-12

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