A Brain Computer Interface (BCI) is needed to acquire and process the activity of several neurons in the cortex in real time for investigations in neuroscience experiments and to retrieve the control signals in prosthetic applications.
A fully implantable architecture that presents low-power consumption, small area and low-noise is proposed. It includes:
- A microelectrode array.
- A mixed-signal data acquisition IC with conditioning and digitization.
- A digital IC for control and digital signal processing.
- A wireless interface IC to transfer data supplies energy.
A 16-channel multi-chip prototype including different processing ICs has been implemented in a CMOS 0.18-μm process. It dissipates 138 μW per channel and has a surface of 2.3 mm2. In-vivo testing of the prototype is in progress.
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