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1 International Journal of Microelectronics and Computer Science

1 2014

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A reconﬁgurable electrical stimulator for the needs of multichannel neurobiological experiments

Kmon P., Drozd A.

International Journal of Microelectronics and Computer Science

2014

Vol. 5, nr 3

87--91

The article presents a project of an output stage of the system designed for electrical stimulation of neural cells. The construction proposed is based on an operational ampliﬁer working in a conﬁguration of adjustable current source and is dedicated to the multichannel integrated electronic system destined for neurobiological experiments. The system has been tested in the CMOS 180nm technology and is characterized by a wide range of changes in stimulation currents (3 current ranges: 2 μA, 10 μA, 200 μA), high output impedance (above 20 MΩ), as well as a wide range of an output voltage ± 1.45 V for a ± 1.65 V supply voltage). The stimulator can generate different current patterns thanks to RAM and stimulator control logic employed. The work presents results of the simulations that concern both the scope of adjustments of stimulation currents and their mismatches between stimulation channels. The exemplary current waveforms are also shown.